anatomy 2 chapter 30 – Flashcards
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All of the following will increase heart rate except:
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stimulation of cold receptors in the skin.
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Which of the following is not true of the baroreceptors?
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They are sensitive to changes in the oxygen content of the blood.
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Which of the following factors increases heart rate?
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Anxiety and fear
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Peripheral resistance is affected primarily by:
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blood viscosity and the diameter of arterioles.
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Which of the following is not a mechanism that increases blood volume and therefore venous return of blood to the heart?
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Atrial natriuretic hormone
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Which of the following is not a true statement about cardiac output?
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In can be computed by using Fick's Formula.
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The primary fluid flow principle of circulation is based on all of the following except a fluid:
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flows only when a pressure gradient is absent.
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An increase in heart rate tends to increase
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All of the above (arterial blood volume, blood pressure and cardiac output)
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Cardiac output is determined by the:
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stroke volume and heart rate.
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Which of the following statements is true regarding local control of arterioles?
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Local vasodilation is also referred to as active hyperemia.
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The Fick formula is used for determining:
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cardiac output
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The greatest resistance to blood flow occurs in the:
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arterioles.
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Which of the following events would tend to cause a decrease in blood viscosity?
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Marked Anemia
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A decrease in total plasma volume results from the _____ mechanism
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atrial natriuretic hormone
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Minute volume is equal to the:
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pressure gradient divided by the resistance.
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Which artery in the arm is used for measuring blood pressure?
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Brachial
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When you take a blood pressure reading, the first sound that you hear (top reading) is the
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systolic sound, indicating the contraction of the ventricles.
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Which of the following blood vessels has the largest total cross-sectional area?
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Capillaries
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The best description of pulse pressure is the:
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difference between the systolic and the diastolic blood pressures.
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The pulse in the neck is felt over which artery?
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common carotid
