NEET-PG 2013 - Anatomy PYQs Practice Questions

Q: Terminal branches of the internal carotid artery are all except?

Ophthalmic artery. ***Ophthalmic artery*** - The **ophthalmic artery** is a **branch** (not a terminal branch) of the internal carotid artery that arises shortly after the ICA emerges from the cavernous sinus. - It enters the orbit through the optic canal to supply the eye, orbit, and surrounding structures. - Terminal branches are the **final divisions** of a vessel, not branches that arise earlier in its course. *Anterior cerebral artery* - The **anterior cerebral artery (ACA)** is one of the **two terminal branches** of the internal carotid artery. - It supplies the medial surfaces of the frontal and parietal lobes. - It arises at the terminal bifurcation of the ICA in the supraclinoid region. *Middle cerebral artery* - The **middle cerebral artery (MCA)** is the other **terminal branch** of the internal carotid artery. - It is the larger of the two terminal branches and supplies the lateral surfaces of the cerebral hemispheres. - It supplies critical areas including the motor and sensory cotices. *Posterior communicating artery* - The **posterior communicating artery (PCoA)** arises near the terminal bifurcation of the ICA and connects it to the posterior cerebral artery. - While technically a branch (not terminal), it arises very close to the terminal bifurcation point. - It is part of the circle of Willis, providing collateral circulation between anterior and posterior cerebral circulation. [Practice more Anatomy PYQs on OnCourse]

Q: Boundaries of the anatomical snuff box are all except

ECU. ***ECU*** - The **extensor carpi ulnaris (ECU)** is not a boundary of the anatomical snuff box. Its tendon inserts into the base of the 5th metacarpal, medial to the snuffbox [1][2]. - The ECU's function is **wrist extension** and **ulnar deviation**, and it does not form part of the snuffbox's borders [1]. *APL* - The **abductor pollicis longus (APL)** tendon forms the **anterior (radial) boundary** of the anatomical snuff box [1][2]. - It inserts into the base of the 1st metacarpal and is responsible for **abducting the thumb** [1]. *EPL* - The **extensor pollicis longus (EPL)** tendon forms the **posterior (ulnar) boundary** of the anatomical snuff box [1][2]. - It inserts into the distal phalanx of the thumb and is responsible for **extending the thumb interphalangeal joint**. *EPB* - The **extensor pollicis brevis (EPB)** tendon forms part of the **anterior (radial) boundary** along with the APL [1][2]. - It inserts into the proximal phalanx of the thumb and aids in **extending the thumb metacarpophalangeal joint** [1]. [Practice more Anatomy PYQs on OnCourse]

Q: Follicles are present in which part of lymph nodes?

Cortex. ***Cortex*** - The **cortex** of a lymph node contains lymphoid follicles, which are sites of **B cell proliferation** and differentiation. - These follicles can be primary (inactive) or secondary (active, with a **germinal center**) based on ongoing immune responses. *Red pulp* - The **red pulp** is a component of the **spleen**, not lymph nodes. - It is primarily involved in filtering blood, removing old or damaged red blood cells, and storing monocytes. *White pulp* - The **white pulp** is also a component of the **spleen**, organized around central arterioles. - It contains periarteriolar lymphoid sheaths (PALS) with T cells and lymphoid follicles with B cells. *Medulla* - The **medulla** of a lymph node is the central region, rich in **medullary cords** (containing plasma cells, macrophages, and B cells) and **medullary sinuses**. - While lymphocytes are present, the organized structures of follicles are characteristic of the cortex. [Practice more Anatomy PYQs on OnCourse]

Q: Collecting part of kidney develops from ?

Ureteric bud. ***Ureteric bud*** - The **ureteric bud** (also known as the metanephric diverticulum) is an outgrowth of the **mesonephric duct** that develops into the collecting system of the kidney. - It gives rise to the **ureter**, **renal pelvis**, major and minor calyces, and all collecting ducts. *Pronephros* - **Pronephros** is the earliest, most rudimentary, and transient excretory structure that appears in human embryos. - It is non-functional in humans and **degenerates completely** by the fourth week of gestation. *Mesonephros* - The **mesonephros** develops after the pronephros and functions as a temporary kidney during the early fetal period (weeks 4-8). - Its tubules primarily contribute to the **male reproductive system** (e.g., epididymis, ductus deferens) and **degenerate** in females. *Metanephros* - The **metanephros** is the definitive kidney in mammals and gives rise to the **nephrons** (glomeruli, Bowman's capsule, proximal and distal convoluted tubules, loop of Henle). - While it's crucial for kidney development, the **collecting part** specifically originates from the ureteric bud, which interacts with the metanephric mesenchyme. [Practice more Anatomy PYQs on OnCourse]

Q: Which muscle is derived from the third pharyngeal arch?

Stylopharyngeus. ***Stylopharyngeus*** - The **stylopharyngeus muscle** is uniquely derived from the **third pharyngeal arch**. - It is innervated by the **glossopharyngeal nerve (CN IX)** and plays a role in elevating the pharynx and larynx during swallowing. - This is the **only muscle** derived from the third pharyngeal arch, making it a key anatomical landmark. *Tensor tympani* - The **tensor tympani muscle** is derived from the **first pharyngeal arch**. - It is innervated by the **mandibular nerve (V3)** and dampens sound by tensing the tympanic membrane. *Cricothyroid* - The **cricothyroid muscle** is derived from the **fourth and sixth pharyngeal arches**. - It is innervated by the **external branch of the superior laryngeal nerve (CN X)** and tenses the vocal cords. *Stapedius* - The **stapedius muscle** is derived from the **second pharyngeal arch**. - It is innervated by the **facial nerve (CN VII)** and dampens sound by stabilizing the stapes bone. [Practice more Anatomy PYQs on OnCourse]

Question 1

Terminal branches of the internal carotid artery are all except?

Accepted Answer

Ophthalmic artery

Answer

Anterior cerebral artery

Answer

Middle cerebral artery

Answer

Posterior communicating artery

Question 2

Boundaries of the anatomical snuff box are all except

Accepted Answer

ECU

Answer

APL

Answer

EPL

Answer

EPB

Question 3

Follicles are present in which part of lymph nodes?

Accepted Answer

Cortex

Answer

Red pulp

Answer

White pulp

Answer

Medulla

Question 4

Collecting part of kidney develops from ?

Accepted Answer

Ureteric bud

Answer

Mesonephros

Answer

Metanephros

Answer

Pronephros

Question 5

Which muscle is derived from the third pharyngeal arch?

Accepted Answer

Stylopharyngeus

Answer

Tensor tympani

Answer

Cricothyroid

Answer

Stapedius

Question 6

Pubic symphysis is which type of joint?

Accepted Answer

Secondary cartilaginous

Answer

Gomphosis

Answer

Fibrous joint

Answer

Primary cartilaginous

Question 7

Arch of Aorta develops from which aortic arch artery?

Accepted Answer

Left 4th

Answer

Right 3rd

Answer

Left 3rd

Answer

Right Truncus arteriosus

Question 8

At which level do the somites initially form?

Accepted Answer

Cervical level

Answer

Lumbar level

Answer

Sacral level

Answer

Thoracic level

Question 9

Mastoid process is which type of epiphysis?

Accepted Answer

Traction epiphysis

Answer

Pressure epiphysis

Answer

Atavistic epiphysis

Answer

Aberrant epiphysis

Question 10

Sinus venosus receives blood from all EXCEPT:

Accepted Answer

Subcardinal vein

Answer

Vitelline vein

Answer

Umbilical vein

Answer

Common cardinal vein

NEET-PG 2013 — Anatomy