Exam 8: Muscle Physiology

Local control mechanisms can override sympathetic control of changes in the size of arterioles.

Match the effects, labelled a. through c., with the change(s). (Options may be used more than once or not at all.) a.This change would increase blood flow. b.This change would decrease blood flow. c.This change would have no effect on blood flow. -increasing the length of a vessel

Match the arteriolar effects, labelled a. through c., with the tissues in question. (Options may be used more than once or not at all.) a.would produce arteriolar vasoconstriction b.would produce arteriolar vasodilation c.would not cause any change in arteriolar calibre -increased stretch of arterioles supplying a particular tissue

Which of the following properties does NOT pertain to the arterioles?

Match the effects, labelled a. through d., with the events in question. (Options may be used more than once or not at all.) a.increase BP b.decrease BP c.increase heart rate only d.have no effect on BP or heart rate -stress

Match the types of vessel, labelled a. through e., with the function(s) they perform. (Options may be used more than once or not at all.) a.arteries b.arterioles c.capillaries d.veins e.lymphatics -site of exchange of nutrients and waste products between the blood and surrounding tissues

For blood pressure recorded as 118/76 mmHg, match the correct values, labelled a. through e., with the pressures in question. a.118 mmHg b.42 mmHg c.97 mmHg d.76 mmHg e.90 mmHg -What is the mean arterial pressure?

Match the effects, labelled a. through e., that the changes in question would have on bulk flow. (Options may be used more than once or not at all.) a.The change would increase ultrafiltration and decrease reabsorption. b.The change would decrease ultrafiltration and increase reabsorption. c.The change would increase both ultrafiltration and reabsorption. d.The change would decrease both ultrafiltration and reabsorption. e.The change would not alter ultrafiltration and reabsorption. -loss of plasma protein into the urine due to kidney disease

Match the types of vessel, labelled a. through e., with the function(s) they perform. (Options may be used more than once or not at all.) a.arteries b.arterioles c.capillaries d.veins e.lymphatics -serve as low-resistance passageways from the tissues to the heart

When the heart is not ejecting blood into the arterial system, the pressure in the arteries falls to zero as blood drains off into the rest of the vasculature.

Cardiovascular changes associated with exercise can be accounted for by local metabolic influences on skeletal muscle arterioles coupled with adjustments via the baroreceptor reflex.

If arterial pressure is elevated, which of these responses do baroreceptor signals trigger?

Normally, most of the blood at any one time is in the capillary beds, because this is where material exchange is taking place.

Given the following parameters, what would the reabsorption pressure be? blood capillary pressure at arteriolar end of tissue capillaries = 35 mmHg Blood capillary pressure at venule end of tissue capillaries = 15 mmHg Plasma-colloid osmotic pressure = 22 mmHg Interstitial fluid hydrostatic pressure = 1 mmHg Interstitial fluid-colloid osmotic pressure = 0 mmHg

Increased venous return _____ the end-diastolic volume.

To which of these terms is vascular resistance related?

Irreversible shock occurs when the cardiovascular system itself starts to deteriorate as a consequence of side effects from compensatory measures to severe hypotension.

Which statement correctly describes vasoconstriction?

The pulse pressure is the maximum pressure exerted in the arteries.

____________________ syndrome occurs with the increased production of the hormone ____________________.