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Example Questions
Example Question #38 : Identifying Nerves And Blood Vessels
Which of the following vessels does not come from the celiac trunk?
Splenic artery
Left gastric artery
Common hepatic artery
Renal artery
Renal artery
The celiac trunk supplies blood to the stomach, liver, spleen, pancreas, and duodenum. It is located in the abdominal cavity above the left and right renal arteries. The renal artery branches off directly from the abdominal aorta.
Example Question #134 : Organs
What is the function of the oculomotor nerve?
Innervation of the lateral rectus muscle
Innervation of the superior oblique muscle
Eye movement
Vision
Eye movement
The function of the oculomotor nerve is eye movement. It controls eye movement through innervating the superior, medial, and inferior rectus muscles, the inferior oblique, levator palpebrae and the pupillary and ciliary muscles. The optic nerve controls vision and the superior oblique and lateral rectus muscles are innervated by the trochlear and abducens nerves, respectively.
Example Question #40 : Identifying Nerves And Blood Vessels
Which blood vessel supplies the brain?
Internal carotid artery
External carotid artery
Internal jugular vein
External jugular vein
Internal carotid artery
Veins take blood back to the heart, and in all but one case (pulmonary veins), they carry oxygen-poor blood. The external carotid artery supplies the face. Only the internal carotid artery goes directly up to supply the brain.
Example Question #41 : Identifying Nerves And Blood Vessels
Which of the following is not a branch off of the human aortic arch?
Right common carotid artery
Left common carotid artery
Left subclavian artery
Brachiocephalic trunk
Right common carotid artery
The three branches off of the human aortic arch are the brachiocephalic trunk, the left common carotid artery, and the left subclavian artery. The brachiocephalic trunk bifurcates into the right subclavian artery and the right common carotid artery.
Example Question #141 : Organs
Which of these cranial nerves has both sensory and motor function?
Optic
Trochlear
Vestibulocochlear
Glossopharyngeal
Glossopharyngeal
Of these choices only the glossopharyngeal nerve has both motor and sensory functions. The trochlear nerve is motor and the optic and vestibulocochlear nerves are both sensory. To help remember the cranial nerves and their respective numbers the following mnemonic may be helpful: Oh Oh Oh, To Touch And Feel Very Green Vegetables, AH. In order from one to twelve: Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochlear, Glossopharyngeal, Vagus, Accessory, Hypoglossal.
Example Question #142 : Organs
Which of the following nerves only have sensory functions?
Common fibular nerve
Sural nerve
Median nerve
Femoral nerve
Suprascapular nerve
Sural nerve
While the other nerves do provide cutaneous sensation, they also innervate muscles in the upper and lower extremities. Of the nerves listed, the sural is the only that only has sensory functions; it provides cutaneous sensation to the lateral lower leg.
Example Question #143 : Organs
Which upper extremity nerve only has motor function?
Axillary nerve
Median nerve
Musculocutaneous nerve
Long thoracic nerve
Suprascapular nerve
Long thoracic nerve
While all of these nerves have motor functions, the long thoracic nerve is the only that has motor function only; it innervates the serratus anterior muscle. The suprascapular nerve provides sensation to portions of the glenohumeral and acromioclavicular joints, the musculocutaneous nerve provides cutaneous sensation to the lateral forearm (as the lateral antebrachial cutaneous nerve), the axillary nerve provides cutaneous sensation to the lateral shoulder, and the median nerve supplies cutaneous sensation to the palmar surfaces of the lateral hand, index, and ring fingers.
Example Question #144 : Organs
The deep lateral rotators of the hip are important for maintaining hip stability. Which one of them is innervated by a branch of the obturator nerve?
Obturator externus
Gemellus superior
Piriformis
Quadratus femoris
Obturator internus
Obturator externus
Of these muscles, the obturator externus is the only one innervated by the obturator nerve. Also, the adductor magnus is innervated by the posterior fibers of the obturator nerve. The obturator internus is innervated by the nerve to the obturator internus. The other deep lateral rotators are innervated by nerves named after the muscles they innervate (e.g. nerve to the piriformis).
Example Question #145 : Organs
Which of the following is not a branch of the facial nerve?
Maxillary
Zygomatic
Posterio auricular
Cervical
Mandibular
Maxillary
There is no maxillary branch of the facial nerve. The branches of the facial nerve are as follows: temporal, zygomatic, buccal, mandibular, cervical, posterior auricular. Recall that the facial nerve is also known as cranial nerve VII.
Example Question #146 : Organs
Which of the following blood vessels does not originate from the internal iliac artery?
Superior gluteal artery
Inferior gluteal artery
None of these
Obturator artery
Femoral artery
Femoral artery
The femoral artery is a continuation of the external iliac artery. The super and inferior gluteal arteries, and the obturator artery are branches of the internal iliac artery.
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