What is an approximate normal resting cardiac output for a healthy adult?
a. 75 ml/min
b. 500 ml/min
c. 2000 ml/min
d. 5000 ml/min
Q. 2 Which of the following formulas is used to calculate the total amount of blood pumped by the heart per minute, or cardiac output?
a. Blood pressure SV
b. Rate SV
c. SV rate
d. SV vascular resistance
Q. 3 Smooth muscle relaxation and vessel dilation are caused mainly by which of the following? 1. Action of local metabolites 2. Cholinergic stimulation 3. Stimulation of beta-adrenergic receptors
a. 1 and 3 only
b. 2 and 3 only
c. 1 and 2 only
d. 1, 2, and 3
Q. 4 Central mechanisms cause contraction and increased resistance to blood flow mainly through which of the following?
a. Adrenergic stimulation and the release of norepinephrine
b. Cholinergic stimulation and the release of acetylcholine
c. Cholinergic stimulation and the release of norepinephrine
d. Stimulation of specialized al-pha-adrenergic receptors
Q. 5 Which portion of the nervous system is mainly responsible for the central control of the blood flow?
a. Higher brain centers
b. Parasympathetic nervous system
c. Somatic (voluntary) nervous system
d. Sympathetic nervous system
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