Anatomy embryology histology videos & books

Correct Answer -A External hemorrhoids are covered by the mucous membrane of the lower half of the anal canal or the skin, and they are innervated by the inferior rectal nerves. Inferior rectal nerve is a branch of pudendal nerve. Lower half of anal canal is sensitive to pain, temperature, touch, and pressure. . The pectinate line indicates the level where the upper half of the anal canal joins the lower half. . The mucous membrane of the upper half is sensitive to stretch and is innervated by sensory fibers that ascend through the hypogastric plexuses. . The involuntary internal Sphincter is supplied by sympathetic fibers from the inferior hypogastric plexuses . The voluntary external sphincter is supplied by the inferior rectal nerve, a branch of the pudendal nerve and the perineal branch of the fourth sacral nerve.

Correct Answer- B Ans. B i.e. Terminal pulp space infection a painful abscess of the deep tissues of the palmar surface of the fingertip that is typically caused by bacterial infection (as with a staphylococcus) and is marked by swelling and pain

Correct Answer-A Diaphragmatic hernias are of various types. The most common is a posterolateral (Bochdalek) hernia, which occurs as a result of a defect in the posterior diaphragm in the region of the tenth or eleventh ribs.

Correct Answer -D Nucleus involved in Papez circuit is anterior nucleus of thalamus. Ref: Review of Medical Physiology by William ganong, 22nd Edition, Page 256

Correct Answer -D Nucleus involved in Papez circuit is anterior nucleus of thalamus. Ref: Review of Medical Physiology by William ganong, 22nd Edition, Page 256

Correct Answer - B The arch of the aorta begins at the level of the upper border of the second sternocostal articulation of the right side. The branches given off from the arch of the aorta are three in number: the brachiocephalic artery (innominate), the left common carotid, and the left subclavian. Brachiocephalic Artery is the largest branch of the arch of the aorta. It divides into the right common carotid and right subclavian arteries.

Correct Answer - C C i.e. Posterior dislocation of hip • Vascular sign of narath is positive in posterior dislocation of hip joint. Due to posterior dislocation, the hip joint falls on the femoral artery, and this causes feeble or absent femoral pulse

Correct Answer -C C5 helps mediate flexion, abduction, and lateral rotation of the shoulder, and flexion of the elbow. Both C5 and C6 mediate extension of the elbow. m Extension of the fingers is mediated by C7 and 8. Extension of the shoulder is mediated by C7 and 8. m Flexion of the wrist is mediated by C6 and 7.

Correct Answer - B Preganglionic nerves travel in the lesser petrosal branch of the glossopharyngeal nerve and synapse in the otic ganglion. Postganglionic fibers reach the gland via the auriculotemporal nerve. Nerve supply of parotid gland Innervation of the salivary gland is as follows:- Parasympathetic (secretomotor) They reach the gland through auriculotemporal nerve as the following route:- Preganglionic fibers - Originate in the inferior salivary nucleus; pass through glossopharyngeal nerve; its tympanic branch; tympanic plexus, and lesser petrosal nerve. Relay ganglion:- Otic ganglion Postganglionic fibers:- Pass through the auriculotemporal nerve to reach the gland. Sympathetic (Vasomotor) Derived from the plexus around the middle meningeal artery. Sensory: derived from the auriculotemporal nerve, except for parotid fascia and overlying skin which are innervated by the great auricular nerve(c2, c3)