Female sexual physiology US Medical PG Practice Questions and MCQs
Practice US Medical PG questions for Female sexual physiology. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Female sexual physiology US Medical PG Question 1: A 17-year-old girl presents to her pediatrician for a wellness visit. She currently feels well but is concerned that she has not experienced menarche. She reports to recently developing headaches and describes them as pulsating, occurring on the left side of her head, associated with nausea, and relieved by ibuprofen. She is part of the school’s rugby team and competitively lifts weights. She is currently sexually active and uses condoms infrequently. She denies using any forms of contraception or taking any medications. Her temperature is 98.6°F (37°C), blood pressure is 137/90 mmHg, pulse is 98/min, and respirations are 17/min. On physical exam, she has normal breast development and pubic hair is present. A pelvic exam is performed. A urine hCG test is negative. Which of the following is the best next step in management?
- A. Serum testosterone
- B. Serum T3 and T4
- C. Serum estradiol
- D. MRI of the head
- E. Pelvic ultrasound (Correct Answer)
Female sexual physiology Explanation: ***Pelvic ultrasound***
- A pelvic ultrasound is the **best initial step** to visualize the anatomy of the reproductive organs and rule out structural abnormalities like **Müllerian agenesis** or an imperforate hymen, which could explain primary amenorrhea despite normal secondary sexual characteristics.
- Given the patient's **primary amenorrhea** (absence of menarche by age 15 with secondary sexual characteristics) and active sexual life, a pelvic ultrasound can also help identify potential abnormalities such as a **cryptomenorrhea** due to outflow tract obstruction.
*MRI of the head*
- While an MRI of the head might be considered later to evaluate for **hypothalamic or pituitary causes** (e.g., tumors like craniopharyngioma or prolactinoma) of primary amenorrhea, it is not the initial imaging step.
- The patient's headaches, though concerning for migraine, are likely **unrelated** to her primary amenorrhea at this stage without other neurological signs or significantly elevated prolactin levels.
*Serum estradiol*
- Measuring serum estradiol levels is important in evaluating primary amenorrhea to assess **gonadal function** and differentiate between hypogonadotropic and hypergonadotropic hypogonadism.
- However, direct visualization of the reproductive tract and ruling out **anatomical obstructions** is typically a more immediate and critical first step in a patient with normal secondary sexual development.
*Serum T3 and T4*
- Thyroid hormone levels (T3 and T4) are assessed to rule out **thyroid dysfunction** (hypothyroidism or hyperthyroidism) as a cause of menstrual irregularities or primary amenorrhea.
- While thyroid issues can affect menstruation, they are generally not the most common or immediate cause to investigate in a patient with **normal secondary sexual characteristics** and no other overt symptoms of thyroid disease.
*Serum testosterone*
- Serum testosterone levels are useful in evaluating for **hyperandrogenism**, which might be seen in conditions like **Polycystic Ovary Syndrome (PCOS)** or **androgen-secreting tumors**.
- However, in this patient with normal breast development and pubic hair but no menarche, the initial focus is on confirming the presence of a **uterus and ovaries** and ruling out anatomical obstructions, rather than immediately investigating androgen excess.
Female sexual physiology US Medical PG Question 2: A 51-year-old woman presents to the primary care clinic complaining of trouble sleeping. She reports that she has episodes of "overheating" and "sweating" during the day and at night. The nightly episodes keep her from staying asleep. She also explains how embarrassing it is when she suddenly becomes hot and flushed during work meetings. The patient becomes visibly upset and states that she is worried about her marriage as well. She says she has been fighting with her husband about not going out because she is "too tired." They have not been able to have sex the past several months because "it hurts." Labs are drawn, as shown below:
Follicle stimulating hormone (FSH): 62 mIU/mL
Estradiol: 34 pg/mL
Progesterone: 0.1 ng/mL
Luteinizing hormone (LH): 46 mIU/mL
Free testosterone: 2.1 ng/dL
Which of the following contributes most to the production of estrogen in this patient?
- A. Adrenal glands
- B. Adipose tissue (Correct Answer)
- C. Bartholin glands
- D. Mammary glands
- E. Ovaries
Female sexual physiology Explanation: **Adipose tissue**
- In **postmenopausal women**, the ovaries no longer produce significant amounts of estrogen; instead, **adipose tissue** becomes the primary site for estrogen synthesis through the conversion of **androgens** (like androstenedione from the adrenal glands) into **estrone** via **aromatase**.
- The patient's presentation with **hot flashes**, **night sweats**, **sleep disturbance**, **vaginal dryness** (painful intercourse), and **elevated FSH/LH** with **low estradiol** is classic for **menopause**, highlighting the shift in estrogen production.
*Adrenal glands*
- The **adrenal glands** primarily produce **androgens** (e.g., androstenedione, DHEA) and a small amount of estrogens, but their main contribution to estrogen in menopause is indirect, by providing substrates for conversion in peripheral tissues.
- While they are a source of **androgens**, they do not directly contribute most significantly to **estrogen production** in a menopausal woman compared to the peripheral conversion in adipose tissue.
*Bartholin glands*
- **Bartholin glands** are located at the vaginal opening and produce **lubricating fluid**, but they play no role in **hormone production**, including estrogen.
- They are exocrine glands involved in lubrication during sexual arousal.
*Mammary glands*
- **Mammary glands** are primarily involved in **milk production** (lactation) and are target organs for sex hormones, but they do not produce significant amounts of **estrogen**.
- They respond to estrogen but do not synthesize it in substantial quantities.
*Ovaries*
- In premenopausal women, the **ovaries** are the primary source of **estrogen** (mainly estradiol), but in this 51-year-old woman with menopausal symptoms and high FSH/LH, ovarian function has significantly declined.
- The **elevated FSH and LH** levels, coupled with **low estradiol**, indicate **ovarian failure**, meaning the ovaries are no longer actively producing estrogen.
Female sexual physiology US Medical PG Question 3: A 41-year-old woman with subclinical hypothyroidism comes to the physician because of a 6-month history of progressively worsening headaches and irregular menses. Her menses had previously occurred at regular 30-day intervals with moderate flow, but her last menstrual period was 12 weeks ago. She also reports that her interest in sexual intercourse has recently decreased. Her serum prolactin level is elevated. Which of the following is the most appropriate pharmacotherapy for this patient?
- A. Methyldopa
- B. Estrogen
- C. L-thyroxine
- D. Bromocriptine (Correct Answer)
- E. Metoclopramide
Female sexual physiology Explanation: ***Bromocriptine***
- The patient's symptoms (headaches, irregular menses, decreased libido) coupled with an **elevated serum prolactin level** are indicative of **hyperprolactinemia**, likely due to a pituitary adenoma (prolactinoma).
- **Bromocriptine** is a **dopamine agonist** that effectively reduces prolactin secretion by stimulating dopamine D2 receptors in the pituitary, leading to resolution of symptoms and potential shrinkage of prolactinomas.
- This is the **first-line pharmacotherapy** for prolactinomas.
*Methyldopa*
- **Methyldopa** is an **antihypertensive medication** that works by stimulating central alpha-2 adrenergic receptors.
- It is not indicated for the treatment of hyperprolactinemia; in fact, **methyldopa can cause hyperprolactinemia** as a side effect.
*Estrogen*
- **Estrogen** therapy is sometimes used in women with irregular menses, but it would not address the underlying hyperprolactinemia.
- In fact, **estrogen can stimulate prolactin secretion**, potentially worsening the condition and should be avoided in patients with prolactinomas.
*L-thyroxine*
- **L-thyroxine** is used to treat **hypothyroidism**, which the patient has (subclinical), but it will not directly address the symptoms related to hyperprolactinemia (headaches, irregular menses, elevated prolactin).
- While severe primary hypothyroidism can sometimes cause secondary hyperprolactinemia via TRH stimulation, this patient's **subclinical hypothyroidism** is unlikely to be the primary cause of her significantly elevated prolactin and symptoms.
- The **most appropriate therapy** targets the hyperprolactinemia directly.
*Metoclopramide*
- **Metoclopramide** is a **dopamine antagonist** used as an antiemetic and prokinetic agent.
- It **increases prolactin secretion** by blocking dopamine D2 receptors in the pituitary, which would significantly exacerbate the patient's hyperprolactinemia.
Female sexual physiology US Medical PG Question 4: A 36-year-old man comes to the clinic for follow-up of his general anxiety disorder. He was diagnosed a year ago for excessive worry and irritability and was subsequently started on paroxetine. He demonstrated great response to therapy but is now complaining of decreased libido, which is affecting his marriage and quality of life. He wishes to switch to a different medication at this time. Following a scheduled tapering of paroxetine, the patient is started on a different medication that is a partial agonist of the 5-HT1A receptor. Which of the following is the most likely drug that was prescribed?
- A. Diazepam
- B. Duloxetine
- C. Phenelzine
- D. Amitriptyline
- E. Buspirone (Correct Answer)
Female sexual physiology Explanation: ***Buspirone***
- **Buspirone** is a **5-HT1A receptor partial agonist** used for generalized anxiety disorder
- Has a **lower incidence of sexual side effects** compared to SSRIs, making it an ideal alternative when patients experience SSRI-induced sexual dysfunction
- Delayed onset of action (2-4 weeks) but effective for long-term anxiety management without dependence risk
*Diazepam*
- Benzodiazepine that enhances GABA-A receptor activity, not a 5-HT1A partial agonist
- While effective for acute anxiety, carries risks of dependence, sedation, and tolerance
- Not appropriate for long-term management or as a switch for SSRI-induced sexual dysfunction
*Duloxetine*
- Serotonin-norepinephrine reuptake inhibitor (SNRI), not a 5-HT1A partial agonist
- Can also cause **sexual dysfunction** similar to SSRIs (decreased libido, anorgasmia)
- Would not address the patient's primary complaint
*Phenelzine*
- Monoamine oxidase inhibitor (MAOI) affecting multiple neurotransmitters, not a 5-HT1A partial agonist
- Requires strict dietary restrictions (tyramine-free diet) and has significant drug interactions
- Reserved for treatment-resistant anxiety/depression, not first-line for SSRI side effect management
*Amitriptyline*
- Tricyclic antidepressant (TCA) that inhibits norepinephrine and serotonin reuptake
- Not a 5-HT1A partial agonist
- Can cause sexual dysfunction along with anticholinergic effects (dry mouth, constipation, urinary retention), sedation, and orthostatic hypotension
Female sexual physiology US Medical PG Question 5: A 21-year-old female presents to her first gynecology visit. She states that six months ago, she tried to have sexual intercourse but experienced severe pain in her genital region when penetration was attempted. This has continued until now, and she has been unable to have intercourse with her partner. The pain is not present at any other times aside from attempts at penetration. The patient is distressed that she will never be able to have sex, even though she wishes to do so. She does not recall ever having a urinary tract infection and has never been sexually active due to her religious upbringing. In addition, she has never tried to use tampons or had a Pap smear before. She denies alcohol, illicit drugs, and smoking. The patient is 5 feet 6 inches and weighs 146 pounds (BMI 23.6 kg/m^2). On pelvic exam, there are no vulvar skin changes, signs of atrophy, or evidence of abnormal discharge. The hymen is not intact. Placement of a lubricated speculum at the introitus elicits intense pain and further exam is deferred for patient comfort. Office urinalysis is negative. Which of the following is a risk factor for this patient’s condition?
- A. Low estrogen state
- B. Generalized anxiety disorder (Correct Answer)
- C. Endometriosis
- D. Squamous cell carcinoma of the vulva
- E. Body dysmorphic disorder
Female sexual physiology Explanation: ***Generalized anxiety disorder***
- The patient describes **severe pain upon attempted penetration** and significant distress about her inability to have intercourse, consistent with **genito-pelvic pain/penetration disorder (GPPPD)**, formerly known as dyspareunia, vaginismus, and sexual aversion disorder.
- While GPPPD is multi-factorial, **anxiety and psychological distress** are significant risk factors and often exacerbate the condition, leading to muscle guarding and increased pain perception.
*Low estrogen state*
- This patient is a pre-menopausal 21-year-old with a normal BMI, making a **low estrogen state** highly unlikely.
- Low estrogen typically leads to **vulvovaginal atrophy**, dryness, and pain, which would present with objective findings like vulvar skin changes or atrophy, not observed in this case.
*Endometriosis*
- Endometriosis causes **deep dyspareunia** (pain with deep penetration), often accompanied by chronic pelvic pain, dysmenorrhea, and infertility.
- The patient's pain is described as severe with *attempted penetration at the introitus*, which is more superficial than typical endometriosis-related pain.
*Squamous cell carcinoma of the vulva*
- This condition is typically found in older women and associated with a history of **HPV infection** or chronic inflammation.
- It would present with **visible vulvar lesions**, itching, bleeding, or palpable masses, none of which are described in the patient's exam.
*Body dysmorphic disorder*
- Body dysmorphic disorder involves a **preoccupation with perceived flaws** in physical appearance, leading to significant distress or impairment.
- While it can impact sexual intimacy, the primary symptom described is **physical pain during attempted intercourse**, not distress over her genital appearance.
Female sexual physiology US Medical PG Question 6: A 56-year-old man comes to the clinic complaining of sexual dysfunction. He reports normal sexual function until 4 months ago when his relationship with his wife became stressful due to a death in the family. When asked about the details of his dysfunction, he claims that he is “able to get it up, but just can’t finish the job.” He denies any decrease in libido or erections, endorses morning erections, but an inability to ejaculate. He is an avid cyclist and exercises regularly. His past medical history includes depression and diabetes, for which he takes citalopram and metformin, respectively. A physical examination is unremarkable. What is the most likely explanation for this patient’s symptoms?
- A. Testosterone deficiency
- B. Autonomic neuropathy secondary to systemic disease
- C. Psychological stress
- D. Damage to the pudendal nerve
- E. Medication side effect (Correct Answer)
Female sexual physiology Explanation: ***Medication side effect***
- The patient's inability to ejaculate while maintaining normal libido, erections, and morning erections is highly suggestive of **ejaculatory dysfunction** caused by the **citalopram**, a selective serotonin reuptake inhibitor (SSRI).
- SSRIs, like citalopram, are known to commonly cause sexual side effects, including **delayed ejaculation** and **anorgasmia**, by increasing serotonin levels, which can inhibit the ejaculatory reflex.
*Testosterone deficiency*
- Testosterone deficiency usually presents with **decreased libido**, **erectile dysfunction**, and a reduction in **morning erections**, which are not reported by this patient.
- While it can impact sexual function, the specific symptom of inability to ejaculate with preserved erections points away from low testosterone.
*Autonomic neuropathy secondary to systemic disease*
- **Autonomic neuropathy**, often seen in patients with **diabetes**, can lead to ejaculatory dysfunction, including **retrograde ejaculation**.
- However, the patient's normal erections and libido, along with the recent onset coinciding with a stressful event and medication use, make medication a more likely primary cause in this scenario.
*Psychological stress*
- **Psychological stress** can certainly contribute to sexual dysfunction, leading to decreased libido or erectile difficulties.
- However, the patient explicitly states his erections and libido are normal, and he only experiences an inability to ejaculate, which is less commonly the sole manifestation of stress.
*Damage to the pudendal nerve*
- **Pudendal nerve damage** typically results in issues with **erectile function**, sensation in the perineum, and potentially urinary or fecal incontinence.
- This patient's preserved erections and specific issue with ejaculation make pudendal nerve damage an unlikely primary cause.
Female sexual physiology US Medical PG Question 7: A 51-year-old man presents to his physician with decreased libido and inability to achieve an erection. He also reports poor sleep, loss of pleasure to do his job, and depressed mood. His symptoms started a year ago, soon after his wife got into the car accident. She survived and recovered with the minimal deficit, but the patient still feels guilty due to this case. The patient was diagnosed with diabetes 6 months ago, but he does not take any medications for it. He denies any other conditions. His weight is 105 kg (231.5 lb), his height is 172 cm (5 ft 7 in), and his waist circumference is 106 cm. The blood pressure is 150/90 mm Hg, and the heart rate is 73/min. The physical examination only shows increased adiposity. Which of the following tests is specifically intended to distinguish between the organic and psychogenic cause of the patient’s condition?
- A. Angiography
- B. Duplex ultrasound of the penis
- C. Penile tumescence testing (Correct Answer)
- D. Biothesiometry
- E. Injection of prostaglandin E1
Female sexual physiology Explanation: ***Penile tumescence testing***
- This test, often performed as a **nocturnal penile tumescence (NPT) test**, measures erections during sleep. The presence of normal nocturnal erections indicates a **psychogenic** cause for erectile dysfunction, as physiological mechanisms are intact.
- The absence of nocturnal erections, despite adequate sleep, suggests an **organic** cause, as the body's natural erectile reflex is impaired.
*Angiography*
- **Angiography** is an invasive procedure used to visualize blood vessels and identify arterial blockages or abnormalities. It is typically reserved for cases where vascular disease is strongly suspected as the cause of erectile dysfunction and often considered before revascularization surgery.
- While it can identify **vascular organic causes** of erectile dysfunction, it does not directly differentiate between psychogenic and organic causes universally; it focuses specifically on arterial flow.
*Duplex ultrasound of the penis*
- **Duplex ultrasound** evaluates blood flow within the penile arteries and veins, assessing both arterial inflow and veno-occlusive function. It aids in diagnosing **vascular abnormalities**, such as arterial insufficiency or venous leakage.
- Similar to angiography, duplex ultrasound identifies specific **organic vascular pathologies** but does not definitively distinguish between psychogenic and organic causes of erectile dysfunction if vascular function is normal.
*Biothesiometry*
- **Biothesiometry** measures penile vibratory sensation threshold, which assesses **neurological function** of the penis. It helps detect peripheral neuropathy, a potential organic cause of erectile dysfunction, especially in diabetic patients.
- While useful for uncovering **neurological organic causes**, biothesiometry does not differentiate between psychogenic and organic etiologies in cases where neurological function is normal.
*Injection of prostaglandin E1*
- The **injection of prostaglandin E1** (alprostadil) is a diagnostic and therapeutic tool that induces an erection by relaxing smooth muscle in the penile arteries, increasing blood flow. A strong response indicates intact vascular smooth muscle function.
- A successful response to prostaglandin E1 suggests that vascular smooth muscle and neurological pathways are largely functional, which can indirectly point away from severe organic causes, but it's not a definitive differentiator between **psychogenic and organic** causes as it by-passes some physiological mechanisms.
Female sexual physiology US Medical PG Question 8: A 52-year-old woman comes to the physician because of vaginal itchiness and urinary frequency for the past 1 year. She stopped having vaginal intercourse with her husband because it became painful and occasionally resulted in vaginal spotting. Her last menstrual cycle was 14 months ago. She has vitiligo. Her only medication is a topical tacrolimus ointment. Her temperature is 37.1°C (98.8°F), pulse is 85/min, and blood pressure is 135/82 mm Hg. Examination shows multiple white maculae on her forearms, abdomen, and feet. Pelvic examination shows scarce pubic hair, vulvar pallor, and narrowing of the vaginal introitus. Which of the following most likely contributes to this patient's current symptoms?
- A. Decrease of pH
- B. Thinning of the mucosa (Correct Answer)
- C. Sclerosis of the dermis
- D. Dysplasia of the epithelium
- E. Inflammation of the vestibular glands
Female sexual physiology Explanation: ***Thinning of the mucosa***
- The patient's symptoms of vaginal itchiness, painful intercourse, vaginal spotting, and vulvar pallor, along with her postmenopausal status, are consistent with **genitourinary syndrome of menopause (GSM)**, previously known as vulvovaginal atrophy.
- GSM is characterized by a **thinning of the vaginal and vulvar mucosa** due to decreased estrogen levels, leading to dryness, fragility, and susceptibility to irritation and injury.
*Decrease of pH*
- A decrease in vaginal pH indicates a more acidic environment, which is generally protective against certain infections and is typically seen in pre-menopausal women.
- In postmenopausal women with **atrophic vaginitis**, the pH tends to **increase** (become more alkaline) due to a decrease in lactobacilli, not decrease.
*Sclerosis of the dermis*
- Sclerosis of the dermis is characteristic of conditions like **Lichen Sclerosus**, which can cause vulvar itching and pallor, but it's typically associated with a **parchment-like skin appearance** and potential architectural changes like fusion of labia and introital narrowing.
- While overlap in symptoms can exist, the presentation here, especially with painful intercourse and spotting, points more directly to estrogen deficiency and mucosal thinning.
*Dysplasia of the epithelium*
- Dysplasia refers to abnormal cell growth, which is a precancerous condition, seen in conditions like **vulvar intraepithelial neoplasia (VIN)**.
- While VIN can cause itching, it is not typically associated with the widespread symptoms of dryness, dyspareunia, and urinary frequency without other concerning features like pigmented or raised lesions.
*Inflammation of the vestibular glands*
- Inflammation of the vestibular glands (Bartholin's or Skene's glands) primarily causes localized pain, swelling, and sometimes abscess formation at the entrance of the vagina.
- This would not typically present with generalized vaginal itchiness, widespread vulvar pallor, dyspareunia, and urinary frequency as the primary symptoms.
Female sexual physiology US Medical PG Question 9: A 28-year-old female comes to the emergency department complaining of heart palpitations. She has had multiple episodes of these in the past few months. She has found that if she wears tight clothing then sometimes these episodes will stop spontaneously. On presentation to the ED, she feels like her heart is pounding and reports feeling nauseous. She appears mildly diaphoretic. Her blood pressure is 125/75 mmHg, pulse is 180/min, and respirations are 22/min with an O2 saturation of 99% on room air. A neck maneuver is performed and her pulse returns to 90/min with improvement of her symptoms. Stimulation of afferent fibers from which nerve are most responsible for the resolution of her symptoms?
- A. Facial
- B. Hypoglossal
- C. Glossopharyngeal (Correct Answer)
- D. Trigeminal
- E. Vagus
Female sexual physiology Explanation: ***Glossopharyngeal***
- The question specifically asks about **afferent fibers** responsible for the resolution of symptoms during the neck maneuver (carotid sinus massage).
- The **glossopharyngeal nerve (cranial nerve IX)** provides the **afferent (sensory) limb** of the baroreflex by carrying signals from **baroreceptors in the carotid sinus** to the nucleus tractus solitarius in the medulla.
- When the carotid sinus is massaged, baroreceptors are stimulated → afferent signals travel via **CN IX** → medullary cardiovascular centers → efferent vagal output → heart rate slows.
- This is the afferent pathway that initiates the reflex response to terminate **supraventricular tachycardia (SVT)**.
*Vagus*
- The **vagus nerve (cranial nerve X)** is crucial for treating SVT, but it provides the **efferent (motor) limb** of the baroreflex, not the afferent limb.
- After afferent signals from CN IX reach the medulla, the vagus nerve carries parasympathetic output to the SA node to slow the heart rate.
- If the question asked about efferent fibers, vagus would be correct, but it asks specifically about **afferent fibers**.
*Facial*
- The **facial nerve (cranial nerve VII)** primarily controls **facial expressions**, carries taste sensation from the anterior two-thirds of the tongue, and innervates salivary glands.
- It has no role in the baroreflex or cardiac rhythm regulation via neck maneuvers.
*Hypoglossal*
- The **hypoglossal nerve (cranial nerve XII)** is responsible for **tongue movement**.
- It has no involvement in cardiac rhythm regulation or the afferent pathways of the baroreflex.
*Trigeminal*
- The **trigeminal nerve (cranial nerve V)** mediates sensation from the face and controls the muscles of **mastication (chewing)**.
- While trigeminal stimulation via the **diving reflex** (cold water on face) can cause bradycardia, this is not the mechanism involved in carotid sinus massage for SVT treatment.
Female sexual physiology US Medical PG Question 10: Which of the following cells in the body depends on dynein for its unique functioning?
- A. Small intestinal mucosal cell
- B. Skeletal muscle cell
- C. Adipocyte
- D. Lower esophageal mucosal cell
- E. Fallopian tube mucosal cell (Correct Answer)
Female sexual physiology Explanation: ***Fallopian tube mucosal cell***
- Dynein is a **motor protein** that facilitates the movement of **cilia** along microtubules.
- The ciliary action in fallopian tube mucosal cells is crucial for **transporting the ovum** from the ovary to the uterus.
*Small intestinal mucosal cell*
- These cells primarily depend on **microvilli** for absorption, which are actin-based structures and do not directly involve dynein for their primary function of absorption.
- While they have some cilia, their unique and defining function is nutrient absorption, not movement dependent on dynein.
*Skeletal muscle cell*
- Skeletal muscle cells rely on the interaction of **actin and myosin** filaments for **contraction**.
- Dynein is not directly involved in the mechanism of muscle contraction.
*Adipocyte*
- Adipocytes are specialized in **lipid storage** and release, a process that does not involve dynein.
- Their unique function does not depend on intracellular or extracellular movement facilitated by dynein.
*Lower esophageal mucosal cell*
- These cells primarily provide a **protective barrier** against gastric acid reflux.
- Their function involves **stratified squamous epithelium** and mucus production, not ciliary movement dependent on dynein.
More Female sexual physiology US Medical PG questions available in the OnCourse app. Practice MCQs, flashcards, and get detailed explanations.
