The two arteries formed by the division of the brachiocephalic trunk are the (a) aorta and internal carotid, (b) axillary and brachial, (c) external and internal carotid, (d) common carotid and subclavian.

The blood vessels that play the most important role in regulating blood pressure and blood flow to a tissue are the (a) arteries, (b) arterioles, (c) veins, (d) venules, (e) capillaries.

The baroreceptors in the carotid sinus and aortic arch are sensitive toa. a decrease in CO₂ ,b. changes in arterial pressure,c. a decrease in O₂,d. all of these.

The myocardium receives its blood supply directly from thea. aorta,b. coronary arteries,c. coronary sinus,d. pulmonary arteries.

Using the letters from column B, match the artery descriptions in column A. (Note that some require more than a single choice.) Column A____(1) unpaired branch of abdominal aorta____(2) second branch of aortic arch____ 3) branch of internal carotid____ (4) branch of external carotid____(5) origin of femoral arteriesColumn Ba. right common carotidb. superior mesentericc. left common carotidd. external iliace. inferior mesentericf. superficial temporalg. celiac trunkh. faciali. ophthalmicj. internal iliac

The unpaired arteries supplying blood to the visceral organs include (a) the adrenal, renal, and lumbar arteries, (b) the iliac, gonadal, and femoral arteries, (c) the celiac and superior and inferior mesenteric arteries, (d) all of these.

The paired arteries supplying blood to the body wall and other structures outside the abdominopelvic cavity include the (a) left gastric, hepatic, splenic, and phrenic arteries, (b) adrenal, colic, lumbar, and gonadal arteries, (c) iliac, femoral, and lumbar arteries, (d) celiac, left gastric, and superior and inferior mesenteric arteries.

Distinguish between elastic arteries, muscular arteries, and arterioles relative to location, histology, and functional adaptations.

A 60-year-old man is unable to walk more than 100 yards without experiencing severe pain in his left leg; the pain is relieved by resting for 5–10 minutes. He is told that the arteries of his leg are becoming occluded with fatty material and is advised to have the sympathetic nerves serving that body region severed. Explain how such surgery might help to relieve this man's problem.