Blood Vessels 1 Flashcards
The muscular layer of a blood vessel is the A. tunica intima. B. tunica externa. C. tunica media. D. tunica interna. E. tunica adventitia
C. tunica media.
Which of the following is the innermost layer of a blood vessel? A. tunica intima B. external elastic membrane C. tunica media D. internal elastic membrane E. tunica externa
A. tunica intima
Which type of artery has a poorly defined tunica externa? A. arterioles B. elastic C. connective D. muscular E. vascular
A. arterioles
Blood from the brain returns to the heart by way of the \_\_\_\_\_ vein. A. vertebral B. azygos C. innominate D. internal jugular E. external jugular
D. internal jugular
Compared to arteries, veins A. are more elastic. B. have more smooth muscle in their tunica media. C. have a pleated endothelium. D. have thinner walls. E. hold their shape better when cut.
D. have thinner walls.
Vasoconstriction and vasodilation affect the heart in what way? A. peripheral blood pressure B. capillary flow C. atrial kick D. afterload E. all of the above
E. all of the above
The femoral artery is an example of which type of artery? A. arteriolar B. elastic C. connective D. muscular E. vascular
D. muscular
The goal of cardiovascular regulation includes
all of the following, except to ensure that
A. blood flow changes occur at the appropriate time.
B. blood flow changes occur in the appropriate area.
C. changes occur without drastically altering blood
pressure.
D. sufficient concentrations of blood cells are present to
meet emergency situations.
E. changes occur without drastically altering blood flow
to a vital organ.
D. sufficient concentrations of blood cells are present
to meet emergency situations.
The following is a list of the vessels that blood passes through from the heart and back to the heart. 1. venules 2. arterioles 3. capillaries 4. elastic arteries 5. medium veins 6. large veins 7. muscular arteries The correct order in which blood passes through these structures from leaving the heart until its return is A. 7, 4, 2, 3, 1, 5, 6. B. 6, 5, 1, 3, 2, 7, 4. C. 5, 6, 1, 3, 2, 7, 4. D. 2, 7, 6, 3, 1, 5, 6. E. 4, 7, 2, 3, 1, 5, 6.
E. 4, 7, 2, 3, 1, 5, 6.
The fusion of the brachiocephalic veins forms the A. inferior vena cava. B. superior vena cava. C. innominate vein. D. subclavian vein. E. azygos vein.
B. superior vena cava.
Which of the following can result from an aneurysm in the brain? A. hypertension B. quadriplegia C. stroke D. myocardial infarction E. all of the above
C. stroke
Stimulation of the aortic baroreceptors results in
A. stimulation of the cardioaccelerator center in the
brain.
B. increased sympathetic stimulation of the heart.
C. increased activity by the parasympathetic nervous
system.
D. stimulation of the vasomotor center.
E. increased vasomotor tone.
C. increased activity by the parasympathetic nervous
system.
Arteriosclerosis can lead to A. hypertension. B. tachycardia. C. coronary artery disease. D. both A and C E. all of the above
D. both A and C
Capillaries that have a complete lining are called A. continuous capillaries. B. fenestrated capillaries. C. sinusoidal capillaries. D. sinusoids. E. vasa vasorum.
A. continuous capillaries.
The pressure that declines from 35 mm Hg to 18 mm Hg is the A. venous pressure. B. capillary hydrostatic pressure. C. blood pressure. D. peripheral pressure. E. none of the above
B. capillary hydrostatic pressure.
The inferior vena cava is classified as a(n) A. large vein. B. venule. C. medium vein. D. arteriovenule. E. venous valve.
A. large vein.
Anxiety can result in A. increased stimulation of the cardioinhibitory center by higher brain centers. B. increased stimulation of the cardioaccelerator center by higher brain centers. C. decreased heart rate. D. decreased blood pressure. E. both C and D
B. increased stimulation of the
cardioaccelerator center by higher brain
centers.
The deep veins of the lower leg include the \_\_\_\_\_ veins. A. internal iliac B. small saphenous and popliteal C. anterior and posterior tibial and peroneal D. peroneal and popliteal E. small saphenous and posterior tibial
C. anterior and posterior tibial and peroneal
Capillaries with an incomplete lining are called A. incomplete capillaries. B. continuous capillaries. C. fenestrated capillaries. D. sinuses. E. vasa vasorum.
C. fenestrated capillaries.
Which of the following are the smallest venous vessels? A. large veins B. venules C. medium veins D. arteriovenules E. venous valves
B. venules
