Human Anatomy and Physiology : Gross Anatomy
Study concepts, example questions & explanations for Human Anatomy and Physiology
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Example Questions
Example Question #68 : Identifying Nerves And Blood Vessels
Which of the following is not a component of the femoral triangle?
Femoral artery
Femoral nerve
Femoral vein
Femur
Femur
The femoral triangle contains (from lateral to medial) the femoral nerve, artery, vein, and canal. The pulsation of the femoral artery may be felt just inferior to the midpoint of the inguinal ligament.
The femoral triangle is bounded by the inguinal ligament superiorly, the sartorius muscle laterally, and the adductor longus muscle medially. The floor of the femoral triangle is formed by the illiopsoas, pectineus, and adductor longus muscles.
Example Question #69 : Identifying Nerves And Blood Vessels
The Vagus nerve controls which type of motor nerves from the neck to the transverse colon?
Sympathetic
Motor
Parasympathetic
Sensory
Parasympathetic
The Vagus nerve has both sensory and motor function. The sympathetic and parasympathetic nervous systems are responsible for the "fight or flight" and "rest and digest" actions of the autonomic nervous system respectively. The Vagus nerve is responsible for the parasympathetic motor nerves.
Example Question #70 : Identifying Nerves And Blood Vessels
Which sensory cranial nerve is responsible for vision?
Olfactory nerve
Optic nerve
Trochlear nerve
Hypoglossal nerve
Optic nerve
The question is asking for a sensory nerve, meaning we can eliminate the trochlear and hypoglossal nerves. The olfactory nerve is responsible for smell whereas the optic nerve for vision, making the correct answer the optic nerve.
Example Question #641 : Gross Anatomy
Which nerve has both sensory and motor functions in the face, sinuses, teeth, and mouth?
Facial nerve
Trigeminal nerve
Oculomotor nerve
Hypoglossal nerve
Trigeminal nerve
There are only four cranial nerves with both sensory and motor functions: the trigeminal, facial, glossopharyngeal, and vagus nerves. Only two of those are answer choices: facial and trigeminal. While the facial nerve controls the tongue, only the trigeminal nerve is responsible for the muscles of mastication around the mouth, making the trigeminal nerve the correct answer.
Example Question #171 : Organs
Which cranial nerve innervates the lateral rectus muscle of the eye?
Optic nerve
Trochlear nerve
Facial nerve
Abducens nerve
Abducens nerve
In this case, we are looking for a nerve with only motor function, leaving us with only the trochlear and abducens nerves. The trochlear nerve innervates the superior oblique muscle of the eye whereas the abducens nerve innervates the lateral rectus muscle, making the correct answer the abducens nerve.
Example Question #72 : Identifying Nerves And Blood Vessels
How many roots make up the brachial plexus?
7
3
6
5
5
The correct answer is 5 roots. They are roots C5-C8 and T1.
Example Question #74 : Identifying Nerves And Blood Vessels
Which of the following his not a trunk of the brachial plexus?
Inferior
Superior
Middle
Medial
Medial
The correct answer is medial. There are 3 trunks and they are named as follows: superior, middle, and inferior.
Example Question #72 : Identifying Nerves And Blood Vessels
Which of the following is not a cord of the brachial plexus?
Middle
Medial
Posterior
Lateral
Middle
The correct answer is middle. There are three cords and they are named as follows: lateral, medial, and posterior.
Example Question #73 : Identifying Nerves And Blood Vessels
Which of the following nerves branches off of the superior trunk of the brachial plexus?
Dorsal scapular nerve
Medial pectoral nerve
Thoracodorsal nerve
Suprascapular nerve
Suprascapular nerve
The correct answer is the suprascapular nerve. The thoracodorsal nerve, dorsal scapular nerve, and medial pectoral nerve branch off of the posterior cord, C5 root, and medial cord respectively.
Example Question #73 : Identifying Nerves And Blood Vessels
Which root(s) gives rise to the middle trunk of the brachial plexus?
C6 and C7
C7
T1
C5
C7
C7 gives rise to the middle trunk of the brachial plexus because it is the middle root. C5 and C6 are superior while C8 and T1 are inferior.
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