Homework _5 Syst Circ -08 Questions

Homework _5 Syst Circ -08 Questions - Homework #5 2008...

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Homework #5 2008 Systemic circulation Loegering 1. Autoregulation of blood flow A. controls arterial blood pressure B. is caused by the myogenic response of vascular smooth muscle C. is mediated by vasodilators produced by cells D. is important for the control of skin blood flow E. regulates venous return 2. The metabolic control of vascular smooth muscle will cause which of the following. A. A decrease in cerebral vascular resistance when arterial pressure is low B. An increase in the strength of cardiac contraction when end diastolic pressure is increased C. An increase in renal vascular resistance following hemorrhage D. A decrease in skin vascular resistance when body temperature increases E. A decrease in skeletal muscle vascular resistance during exercise 3. All of the following are true regarding neural control of the cardiovascular system EXCEPT A. An increase in sympathetic activity causes an increase in vascular resistance B. An increase in parasympathetic tone causes a decrease in vascular resistance C. An increase in sympathetic tone causes an increase in cardiac contractility D. An increase in sympathetic tone causes an increase in hart rate E. A decrease in parasympathetic tone causes an increase in resting heart rate 4. Which of the following will cause an increase in forearm blood flow? A. Hemorrhage B. Standing C. Infusion of a drug that activates alpha adrenergic receptors D. An increase in parasympathetic activity E. An increase in body temperature 5. Applying a negative pressure to the neck over the carotid sinuses will result in A. compression of the carotid sinus B. a decrease in transmural pressure across the carotid sinus C. an increase in carotid sinus baroreceptor firing rate D. a reflex decrease in sympathetic activity E. a reflex decrease in cerebral vascular resistance 1
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Questions 6, 7, 8 and 9. In an anesthetized dog, the carotid sinuses were isolated from the circulation but their afferent nerves were left intact. The results below show the steady state effect of increasing the pulse pressure within the isolated carotid sinuses while holding the mean arterial pressure constant at 100 mm Hg. Carotid Sinus Pulse
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This note was uploaded on 04/07/2008 for the course BMED 4200 taught by Professor Keller during the Spring '08 term at Rensselaer Polytechnic Institute.

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Homework _5 Syst Circ -08 Questions - Homework #5 2008...

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