The smooth muscle in arteriole walls can be stimulated either to contract or to relax, thereby either decreasing or increasing the amount of blood flowing through arteriolar beds.
Indicate whether the statement is true or false.
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Question 2) The hydrostatic pressure difference between the plasma inside the capillary beds and the interstitial fluid surrounding the cells favors filtration of fluid.
Indicate whether the statement is true or false.
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Question 3) The protein osmotic pressure difference between the plasma inside the capillary beds and the interstitial fluid surrounding the cells favors filtration of fluid.
Indicate whether the statement is true or false.
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Question 4) The stroke volume of the heart can be increased by recruiting more cardiac muscle fibers into activity.
Indicate whether the statement is true or false.
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Question 5) The Frank-Starling curve for heart muscle is analagous to a length-tension curve in skeletal muscle.
Indicate whether the statement is true or false.
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Question 6) The Frank-Starling mechanism of the heart states that an increased venous return will normally result in a higher heart rate.
Indicate whether the statement is true or false.
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Question 7) Systolic pressure is the peak pressure in systemic arteries and occurs at the beginning of systole.
Indicate whether the statement is true or false.
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Question 8) Ventricular contractility is the strength of ventricular contraction at any given end-diastolic volume.
Indicate whether the statement is true or false.
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Question 9) Long-term studies show that the risk for heart attack and stroke doubles for every 20 mm increase in diastolic pressure and 10 mm Hg in systolic pressure.
Indicate whether the statement is true or false.
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Question 10) Normal heart sounds are produced by vibrations caused by the closing of the AV valves at the end of diastole and the closing of the aortic and pulmonary valves at the end of systole.
Indicate whether the statement is true or false.
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