Growth and Development — MCQs

Growth and Development Indian Medical PG Practice Questions and MCQs

Question 751: In a child, most of the speech is intelligible to strangers by the age of what?

A. 30 months
B. 36 months (Correct Answer)
C. 48 months
D. 60 months

Explanation: ***36 months*** - By **36 months (3 years old)**, a child's speech is typically **75% intelligible to strangers**, meaning most of what they say can be understood. - At this age, children use **3-4 word sentences**, ask "why" questions, and can follow two-step commands. - This represents the milestone where **"most"** (majority) of speech becomes understandable to unfamiliar listeners. *30 months* - At **30 months (2.5 years old)**, about **50-75% of a child's speech is intelligible to strangers**. - While they are constructing longer sentences, their articulation is still developing, making some words hard to understand. - This does not yet meet the threshold for "most" being clearly intelligible. *48 months* - By **48 months (4 years old)**, a child's speech should be **almost completely intelligible (close to 100%)** to strangers. - This age represents excellent intelligibility beyond the "most" threshold, with sophisticated sentence structure and clear articulation. *60 months* - A child at **60 months (5 years old)** should have **100% intelligibility to all listeners**, with fully developed speech for their age. - Intelligibility is well-established long before this age, making this option too late for the milestone asked.

Question 752: A normally developing 10-month-old child should be able to do all of the following except _______.

A. Play peekaboo
B. Stand alone
C. Pick up a pellet with thumb and index finger
D. Build a tower of 2 cubes (Correct Answer)

Explanation: ***Build a tower of 2 cubes*** - Building a tower of 2 cubes is typically achieved by a child around **15-18 months of age**, as it requires more advanced fine motor coordination and cognitive planning than a 10-month-old usually possesses. - At 10 months, a child might be able to hit two blocks together or pick them up, but not intentionally stack them into a tower. *Stand alone* - Many 10-month-old infants are developing their **gross motor skills** and can **pull themselves up to stand**, and some may even take a few independent steps or stand alone for a brief period. - This milestone is often achieved between **9 and 12 months** of age. *Play peekaboo* - Playing **peekaboo** indicates an understanding of **object permanence**, which typically develops around **8-12 months** of age. - A 10-month-old child can engage in this social game, demonstrating their developing cognitive and social interactive skills. *Pick up a pellet with thumb and index finger* - The development of the **pincer grasp** (picking up small objects with the thumb and forefinger) is a fine motor milestone typically achieved between **9 and 12 months** of age. - This skill is crucial for self-feeding and exploring small objects.

Question 753: The increase in head circumference in the 1st year of life is what percentage of head circumference at birth?

A. 15%
B. 66%
C. 33% (Correct Answer)
D. 90%

Explanation: ***33%*** - The **head circumference** at birth is approximately **35 cm**, and by 1 year of age, it increases to about **47 cm**. - This represents an increase of about **12 cm**, which is roughly **33%** of the birth measurement. *15%* - An increase of 15% would correspond to an increase of roughly **5.25 cm** (35 cm * 0.15), resulting in a head circumference of approximately **40.25 cm** at 1 year. - This rate of growth is **too slow** for normal postnatal head development. *66%* - An increase of 66% would mean an increase of approximately **23.1 cm** (35 cm * 0.66), leading to a head circumference of about **58.1 cm** at 1 year. - This rate of growth is **excessive** and would suggest a pathological condition such as **hydrocephalus**. *90%* - An increase of 90% would correspond to an increase of approximately **31.5 cm** (35 cm * 0.90), resulting in a head circumference of about **66.5 cm** at 1 year. - Such an extreme increase is **highly abnormal** and not physiologically possible within the first year of life.

Question 754: At what age can a child typically walk independently?

A. 15 months (Correct Answer)
B. 18 months
C. 24 months
D. 30 months

Explanation: ***15 months*** - Most children achieve independent walking sometime between 12 and 15 months of age. - While there is a range, 15 months marks a common milestone for **unassisted ambulation**. *18 months* - By 18 months, most children are walking proficiently and often begin to run. - Independent walking usually occurs before this age, with **running** being a more common new motor skill at 18 months. *24 months* - By 24 months, children are typically mastering more complex gross motor skills like jumping and walking up stairs. - Independent walking is almost universally achieved well before this age, with **advanced locomotion** being the focus at 2 years old. *30 months* - At 30 months, children are generally refining balance and coordination, performing tasks like standing on one foot or throwing a ball overhand. - This age is significantly beyond the typical window for initially achieving **independent walking**.

Question 755: In boys, what is the first visible sign of puberty?

A. Testicular enlargement (Correct Answer)
B. Penile growth
C. Dark scrotum
D. Breast hyperplasia

Explanation: **Testicular enlargement** - **Testicular enlargement** is the very first and most reliable visible sign of puberty in boys, usually occurring between ages 9 and 14. - This is due to the activation of the **hypothalamic-pituitary-gonadal (HPG) axis**, leading to increased testosterone production and spermatogenesis. *Penile growth* - While penile growth is a significant pubertal change, it typically occurs **after** the initial testicular enlargement. - It is mediated by **androgens**, which increase as puberty progresses. *Breast hyperplasia* - **Gynecomastia** (breast hyperplasia) can occur in boys during puberty due to a temporary imbalance between estrogen and androgen levels. - However, it is an **occasional and transient** phenomenon, not the primary or first visible sign of puberty. *Dark scrotum* - **Scrotal skin darkens** and thins during puberty as a secondary sex characteristic. - This change occurs **later** in the pubertal sequence, following testicular enlargement.

Question 756: Which of the following is least commonly associated with Down's syndrome?

A. Periodontal disease
B. Delayed eruption of deciduous teeth
C. Premature loss of deciduous teeth (Correct Answer)
D. Retrognathia

Explanation: ***Premature loss of deciduous teeth*** - **Premature loss of deciduous teeth** is the **least commonly associated** feature with Down syndrome among the given options. - While individuals with Down syndrome have increased periodontal disease that can lead to tooth loss, **premature exfoliation of deciduous teeth as a primary developmental feature is uncommon**. - Tooth loss, when it occurs, is typically a **secondary consequence** of severe periodontal destruction rather than an intrinsic developmental anomaly causing premature shedding. - Unlike the delayed eruption pattern which is a consistent finding, premature loss is not a characteristic feature of Down syndrome itself. *Delayed eruption of deciduous teeth* - This is a **common characteristic** of Down syndrome, not the least common. - Infants with Down syndrome frequently experience **delayed eruption of both deciduous and permanent teeth**, reflecting the generalized slower maturation seen in this condition. - Dental developmental delay is well-documented and consistently observed. *Periodontal disease* - This is **very common** in Down syndrome, with prevalence rates of 58-96%. - Individuals have significantly **increased prevalence and severity of periodontal disease** due to compromised immune function, poor oral hygiene, and specific anatomical factors. - One of the most consistent oral manifestations of Down syndrome. *Retrognathia* - **Retrognathia** (recessed lower jaw) is a **common craniofacial feature** in Down syndrome. - Contributes to difficulties in feeding, speech, and can impact airway patency. - Part of the characteristic facial phenotype.

Question 757: All of the following are true regarding congenital dislocation of the hip except which of the following?

A. It is always bilateral (Correct Answer)
B. Asymmetric thigh folds may be seen
C. Galeazzi sign and Ortolani's test may be positive
D. Oligohydramnios is a known risk factor for congenital dislocation of the hip

Explanation: ***It is always bilateral*** - **Congenital dislocation of the hip (CDH)** is more commonly **unilateral**, with a predilection for the left hip. - While it can be bilateral, stating it is *always* bilateral is incorrect. - **Bilateral CDH** occurs in only about 20% of cases. *Asymmetric thigh folds may be seen* - **Asymmetric thigh folds** are a common soft sign of **developmental dysplasia of the hip (DDH)**, though they can also be seen in normal infants. - This asymmetry is due to the femoral head's abnormal position, leading to unequal skin fold distribution on the affected side. *Galeazzi sign and Ortolani's test may be positive* - The **Galeazzi sign** (also known as the Allis sign) indicates limb length discrepancy, often seen in unilateral hip dislocation when the knees are flexed. - **Ortolani's test** is a specific maneuver used to reduce a dislocated hip, producing a characteristic *clunk* as the femoral head re-enters the acetabulum. *Oligohydramnios is a known risk factor for congenital dislocation of the hip* - **Oligohydramnios** (decreased amniotic fluid) is a well-established risk factor for CDH due to restricted fetal movement and abnormal intrauterine positioning. - Other risk factors include **breech presentation**, **female sex**, **firstborn child**, and **family history**. - **Polyhydramnios** (excess amniotic fluid) is NOT associated with increased risk of CDH.

Question 758: Turricephaly is defined as a condition characterized by which of the following?

A. Tall head (Correct Answer)
B. Narrow head
C. Wide head
D. Short head

Explanation: ***Tall head*** - **Turricephaly**, also known as **oxycephaly** or **acrocephaly**, describes a malformation of the skull where the head is abnormally **tall** and pointed. - This condition results from the **premature fusion of cranial sutures**, leading to restricted growth in other directions. *Narrow head* - A narrow head, or **scaphocephaly**, results from the premature fusion of the **sagittal suture**, causing the skull to grow long and narrow. - While it involves abnormal skull shape, it is distinctly different from a tall, pointed head. *Wide head* - A wide head shape, or **brachycephaly**, is characterized by a disproportionately wide and short skull, often due to premature fusion of the **coronal sutures**. - This contrasts with turricephaly, which is defined by vertical rather than horizontal elongation. *Short head* - A short head, or **brachycephaly**, specifically refers to a head that is abnormally short anteroposteriorly and wide in comparison. - This is the opposite of a tall, pointed head which is the defining characteristic of turricephaly.

Question 759: Best indicator of growth monitoring in children is

A. Weight
B. Mid-arm circumference
C. Rate of increase in height & weight (Correct Answer)
D. Head circumference

Explanation: ***Rate of increase in height & weight*** - Monitoring the **rate of increase** in both height and weight over time provides a comprehensive picture of a child's growth trajectory and identifies deviations from normal growth patterns. - This indicator helps detect both **acute and chronic malnutrition**, as well as potential endocrine or genetic disorders affecting growth. *Weight* - While important, **absolute weight** at a single point in time can be misleading as it doesn't account for age or previous growth. - It's a key component of growth assessment but needs to be evaluated in terms of **weight-for-age** or **weight-for-length/height** and plotted over time to show growth velocity. *Mid-arm circumference* - **Mid-arm circumference (MAC)** is primarily an indicator for assessing **acute malnutrition**, especially in emergency settings, due to its correlation with muscle and fat mass. - It does not provide a complete overview of a child's overall growth and development as it doesn't reflect linear growth. *Head circumference* - **Head circumference** is a crucial indicator for monitoring **brain growth and neurological development**, particularly during the first two years of life. - While important for detecting conditions like microcephaly or hydrocephalus, it is not the best single indicator for overall physical growth status.

Question 760: Which of the following is the first sign of sexual maturity in boys?

A. Increase in height
B. Appearance of facial hair
C. Change in voice
D. Increase in testicular size (Correct Answer)

Explanation: ***Increase in testicular size*** - **Testicular enlargement** is the first reliable sign of **puberty** (sexual maturity) in boys, often occurring around age 11-12. - This growth is primarily due to the increase in **Sertoli cells** and **seminiferous tubule** activity, stimulated by rising gonadotropins. *Increase in height* - While a **growth spurt** is a prominent feature of male puberty, it typically follows, rather than precedes, the initial **gonadal changes**. - The rapid increase in height is a later manifestation of **androgen** and growth hormone surges. *Appearance of facial hair* - The development of **facial hair** (beard and mustache) is a manifestation of increasing **androgen levels** during puberty but occurs considerably later than the initial **testicular enlargement**. - It is typically a **Tanner stage 4** or **stage 5** development. *Change in voice* - A deepening of the voice, caused by the enlargement of the **larynx** and lengthening of the **vocal cords**, is a later pubertal event. - This **laryngeal development** is driven by elevated **testosterone** levels and occurs after significant testicular growth has already begun.

Practice by Chapter

Normal Growth Parameters

Practice Questions

Developmental Milestones

Practice Questions

Puberty and Adolescent Development

Practice Questions

Growth Disorders

Practice Questions

Failure to Thrive

Practice Questions

Developmental Screening and Assessment

Practice Questions

Developmental Delays

Practice Questions

Growth Charts and Monitoring

Practice Questions

Short Stature

Practice Questions

Tall Stature

Practice Questions

Precocious and Delayed Puberty

Practice Questions

Psychosocial Development

Practice Questions

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