Anatomy embryology histology videos & books

Correct Answer - A Ans. is 'a' i.e., Middle ear Contents of middle ear Contents of middle ear (tympanic cavity) are :? 1. Ear ossicles Malleus, incus, stapes 2. Muscles →Tensor tympani, stapedius 3. Chorda tympani 4. Tympanic plexus

Correct Answer - D Ans. is 'd' i.e., Profunda femoris Arterial supply of femoral head? 1. Medial circumflex femoral artery (major supply). 2. Lateral circumflex femoral artery. 3. Obturator artery through artery of ligamentum teres. 4. Intramedullary vessels in the femoral neck . Medial and lateral circumflex femoral arteries are branches of profanda femoris artery which in turn is a branch-of femoral artery.

Correct Answer - C Trigone of bladder has following features : 1) Lined by transitional epithelium 2) Mucosa is smooth and firmly adherent 3) Ureters open at lateral angles of base and internal urethral orifice lies at apex. 4) Has Trigonal muscle of bell (smooth muscle layer just beneath mucosa). 5) Derived from absorbed part of mesonephric duct (Wolffian duct).

Correct Answer - B Ans. is 'b' i.e., Median nerve Anterior interosseous nerve is a branch of median nerve.

Correct Answer - D Ans. D: XII Nucleus Ambiguus Function: * Motor innervation of ipsilateral muscles of the soft palate, pharynx, larynx and upper esophagus. Pathway: * Axons of motor neurons in the nucleus ambiguus course with three cranial nerves: C.N. IX (glossopharyngeal), C.N. X (vagus), C.N. XI (the rostral or cranial portion of spinal accessory) to innervate striated muscles of the soft palate, pharynx, larynx and upper esophagus. Deficits: * Lesion of nucleus ambiguus results in atrophy (lower motor neuron) and paralysis of innervated muscles, producing nasal speech, dysphagia, dysphonia, and deviation of the uvula toward the opposite side (strong side). * No affection of the Sternocleidomastoid or Trapezius. These muscles are innervated by cells in the rostral spinal cord (caudal portion C.N. XI).

Correct Answer - D Upper Quadrangular space It has the following boundaries: – the teres major inferiorly – the long head of the triceps laterally For the superior border, some sources list the teres minor, while others list the subscapularis. It contains the scapular circumflex vessels.

Correct Answer - A Ans. A. Maxillary The maxillae are the largest of the facial bones, other than the mandible, and jointly form the whole of the upper jaw. Each bone forms the greater part of the floor and lateral wall of the nasal cavity, and of the floor of the orbit "Orbital surface of maxilla is smooth and triangular, and forms most of the floor of the orbit" Also know: Maxilla is also the most commonly fractured bone of orbital floor. The floor (inferior wall) is formed by the orbital surface of maxilla, the orbital surface of Zygomatic bone and the orbital process of palatine bone The seven bones that articulate to the orbit are 1. Frontal bone 2. Lacrimal bone 3. Ethmoid bone 4. Zygomatic bone 5. Maxillary bone 6. Palatine bone 7. Sphenoid bone

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