Correct Answer - B
Ans. is 'b' i.e., Lower border of T4

Trachea bifurcates at carina, at the level of lower border of T, or T4 -
T5 disc space.

@anatomyvideoss

Correct Answer - A
Ans. is 'a' i.e., Towards metaphysis [Ref Textbook of general
anatomy p. 80]

Nutrient artery

It enters the middle of the shaft through a nutrient foramen, runs
obliquely through the cortex, and then divides into ascending and
desending branches that run towards metaphysis.

Each branch subdivides into a number of smaller parallel vessels
which enter the metaphysis and form hair-pin loops.

The loops anostomose with epiphyseal,metaphyseal and periosteal arteries.

Therefore, metaphysis is the most vascular zone of the long bone.

The nutrient artery supplies the medullary cavity and inner-two third of cortical bone of diaphysis and metaphysis

@anatomyvideoss

Correct Answer - B
Ans. is 'b' i.e., Trochlear notch

Inner surface of olecranon process forms trochlear notch for
articulation of trochlea of humerus.

Radial notch is seen in lateral part of upper end of shaft (not on
olecronon).

Olecranon fossa and coronoid fossa are part of lower end of
humerus.

@anatomyvideoss

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Correct Answer - C
Ans. is 'c' i.e., Cricopharynx

Inferior constrictor muscle has two parts :-

(i) Thyropharyngeous with oblique fibres, and
(ii) Cricopharyngeous
with transverse fibres.

Between these two parts of inferior constrictor exists a potential gap
called Killan's dehiscence. It is also called the gateway to tear as
perforation can occur at this site during esophagoscopy. It is also the site for herniation of pharyngeal mucosa in case of pharyngeal
pouch.

@anatomyvideoss

Correct Answer - A
Portal vein

THE HEPATOBILIARY TRIANGLE OR CYSTOHEPATIC TRIANGLE OR CALOT'S TRIANGLE:

Boundaries:

Common hepatic duct medially
Cystic duct laterally
Inferior surface of liver superiorly

Contents:
Cystic artery
Right hepatic artery
Lymph node of Lund

@anatomyvideoss

Correct Answer - B
B i.e. Medial pterygoid
Temporalis, messeter and lateral pterygoid musclesQ are supplied
by anterior division of mandibular nerve whereas medial pterygoid
muscleQ is supplied by the main trunk of mandibular nerve

@anatomyvideoss

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