The aorta contains specialized sensory nerve endings that respond to stretch of the vessel wall. These pressure-sensitive structures are called aortic arch _________.
Fill in the blank with correct word.
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Question 2) Imagine a patient who loses lots of blood and therefore has less stretch of their aorta with each heartbeat. What reflex will result?
A. Baroreceptors increase firing, the vasomotor center increases firing, and skin blood vessels will dilate to cause a compensatory increase in flow.
B. Baroreceptors decrease firing, the cardioacceleratory center increases firing, and cardiac output will exhibit a compensatory increase.
C. Baroreceptors increase firing, the cardioinhibitory center increases firing, and the heart slows significantly to prevent further bleeding.
D. Baroreceptors decrease firing, the cardioinhibitory center and vasomotor centers increase firing, the heart slows, and
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Question 3) High carbon dioxide levels and low pH in blood of the carotid arteries will stimulate
A. baroreceptors to activate the vasomotor center.
B. chemoreceptors to activate the vasomotor center.
C. baroreceptors to activate the cardioinhibitory center and inhibit the cardioacceleratory center.
D. chemoreceptors to inhibit the vasomotor center.
E. baroreceptors and chemoreceptors to activate the cardioinhibitory center and inhibit the vasomotor center.
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Question 4) Atherosclerosis involves a
A. sustained increase in blood flow that leads to decreases in venous resistance to keep blood pressure constant.
B. sustained increase in resistance that leads to increases in arterial pressure to maintain adequate blood flow.
C. sustained decrease in resistance that leads to decreases in arterial pressure to maintain adequate blood flow.
D. sustained decrease in blood flow that leads to increases in arterial diameter to lower resistance and raise pressure.
E. sustained increase in blood pressure that leads to compensatory vasodilation.
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Question 5) Blood flow is
A. directly related to both the pressure gradient and the resistance.
B. directly related to the pressure gradient but inversely related to the resistance.
C. inversely related to both the pressure gradient and the resistance.
D. inversely related to the pressure gradient but directly related to the resistance.
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Question 6) Increased cardiac output ______ the blood pressure.
A. decreases
B. increases
C. will not affect
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Question 7) The cardiac center of the brainstem includes the
A.
cardioacceleratory center, from which parasympathetic pathways extend.
B.
cardioacceleratory center, from which sympathetic pathways extend.
C.
vasomotor center, from which parasympathetic pathways extend.
D.
cardioinhibitory center, from which sympathetic pathways extend.
E. All of the choices are correct.
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Question 8) If someone's blood pressure were listed as 125/75 mmHg, then their pulse pressure would be
A. 125 mmHg.
B. 5/3.
C. 50 mmHg.
D. 40 mmHg.
E. 100 mmHg.
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Question 9) The contraction of skeletal muscles plays an important role in the movement of blood in the veins.
Indicate whether this statement is true or false.
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Question 10) An increase in blood vessel diameter would lead to a decrease in blood flow.
Indicate whether this statement is true or false.
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