A + P Chapter 20

Terry's blood pressure is 125/70. At what pressure did the nurse taking Terry's blood pressure first hear the sounds of Korotkoff? A.) 70 mm Hg B.) 125 mm Hg C.) 130 mm Hg D.) Immediately after 70 mm Hg

B.) 125 mm Hg

Why does a person in circulatory shock have a rapid and weak pulse? A.) Because of increased parasympathetic stimulation to heart. B.) Because of decreased cardiac output. C.) Because of increased blood volume. D.) Because of decreased stimulation of baroreceptors.

B.) Because of decreased cardiac output.

A blockage of which branch from the aortic arch would interfere with blood flow to the left arm? A.) left common carotid artery B.) left subclavian artery C.) brachiocephalic trunk D.) right common carotid artery

B.) left subclavian artery

Grace is in an automobile accident, and her celiac trunk is ruptured. Which organs will be affected most directly by this injury? A.) kidneys, adrenal glands B.) stomach, spleen, liver, pancreas C.) gonads, abdominal wall, diaphragm D.) diaphragm, esophagus, liver

B.) stomach, spleen, liver, pancreas

Why does blood pressure increase during exercise? A.) Because cardiac output increases. B.) Because resistance in visceral tissues increases. C.) Because generating muscular heat constricts arteries. D.) A and B are correct.

D.) A and B are correct. Because cardiac output increases; Because resistance in visceral tissues increases.

While standing in the hot sun, Sally begins to feel light headed and faints. Explain. A.) Blood has pooled in her lower limbs. B.) Cardiac output has decreased, sending less blood to the brain. C.) Sweating has reduced blood volume. D.) All of the above have occurred.

D.) All of the above have occurred. Blood has pooled in her lower limbs; Cardiac output has decreased, sending less blood to the brain; Sweating has reduced blood volume.

How would applying a small pressure to the common carotid artery affect your heart rate? A.) It would increase heart rate. B.) It would decrease heart rate. C.) No change would result. D.) Random fluctuations would result.

A.) It would increase heart rate.

In a healthy individual, where would the blood pressure be greater, at the aorta or at the inferior vena cava? A.) aorta B.) inferior vena cava

A.) aorta

What effect would the vasoconstriction of the renal artery have on blood pressure and blood volume? A.) increased blood pressure, increased blood volume B.) increased blood pressure, decreased blood volume C.) decreased blood pressure, increased blood volume D.) decreased blood pressure, decreased blood volume

A.) increased blood pressure, increased blood volume

Why are valves located in veins, but not in arteries? A.) venous blood pressure is lower B.) venous blood pressure is higher C.) venous walls are more muscular D.) venous lumens are larger

A.) venous blood pressure is lower

Why would a compression of the common carotid arteries cause a person to lose consciousness? A.) Because it would cause a reflexive decrease in heart rate and blood pressure. B.) Because cerebral arteries would dilate in response to pressure. C.) Because increased blood pressure would occur at the carotid sinus. D.) Because rapid fall in blood flow to the brain would occur.

D.) Because rapid fall in blood flow to the brain would occur.

Where in the body would you find fenestrated capillaries? A.) absorptive areas of intestine B.) filtration areas of kidney C.) choroid plexus of brain D.) all of the above are correct

D.) all of the above are correct Absorptive areas of intestine; filtration areas of kidney; choroid plexus of brain.

Whenever Tim gets angry, a large vein bulges in the lateral region of his neck. Which vein is this? A.) superior vena cava B.) brachiocephalic vein C.) internal jugular vein D.) external jugular vein

D.) external jugular vein

A cross section of tissue shows several small, thin-walled vessels with very little smooth muscle tissue in the tunica media. Which type of vessels are these? A.) arteries B.) capillaries C.) arterioles D.) veins

D.) veins