Human Anatomy and Physiology : Gross Anatomy

Study concepts, example questions & explanations for Human Anatomy and Physiology

varsity tutors app store varsity tutors android store

Example Questions

Example Question #36 : Identifying Nerves And Blood Vessels

Which of the following vessels does not come from the celiac trunk?

Possible Answers:

Renal artery

Common hepatic artery

Left gastric artery

Splenic artery

Correct answer:

Renal artery

Explanation:

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 #35 : Identifying Nerves And Blood Vessels

What is the function of the oculomotor nerve?

Possible Answers:

Innervation of the lateral rectus muscle

Eye movement

Vision

Innervation of the superior oblique muscle

Correct answer:

Eye movement

Explanation:

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 #38 : Identifying Nerves And Blood Vessels

Which blood vessel supplies the brain?

Possible Answers:

Internal jugular vein

External jugular vein

External carotid artery

Internal carotid artery

Correct answer:

Internal carotid artery

Explanation:

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 #131 : Organs

Which of the following is not a branch off of the human aortic arch?

Possible Answers:

Brachiocephalic trunk

Left subclavian artery

Right common carotid artery

Left common carotid artery

Correct answer:

Right common carotid artery

Explanation:

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?

Possible Answers:

Glossopharyngeal

Trochlear

Vestibulocochlear

Optic

Correct answer:

Glossopharyngeal

Explanation:

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?

Possible Answers:

Femoral nerve

Suprascapular nerve

Median nerve

Sural nerve

Common fibular nerve

Correct answer:

Sural nerve

Explanation:

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?

Possible Answers:

Long thoracic nerve

Median nerve

Suprascapular nerve

Axillary nerve

Musculocutaneous nerve

Correct answer:

Long thoracic nerve

Explanation:

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?

Possible Answers:

Obturator externus

Obturator internus

Gemellus superior

Quadratus femoris

Piriformis

Correct answer:

Obturator externus

Explanation:

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?

Possible Answers:

Mandibular

Posterio auricular

Zygomatic

Cervical

Maxillary

Correct answer:

Maxillary

Explanation:

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?

Possible Answers:

Obturator artery

Superior gluteal artery

None of these

Inferior gluteal artery

Femoral artery

Correct answer:

Femoral artery

Explanation:

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.

Learning Tools by Varsity Tutors