The coronary __________ receives blood that has circulated through the myocardium and transports it to the right atrium.
Fill in the blank(s) with the appropriate word(s).
sinus
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Pectoralis major is located in the ________.
A. elbow B. chest C. upper portion of the thigh D. front of lower leg
Air flows out of the body during expiration because
A. intrapulmonary pressure is greater than atmospheric pressure. B. intrapleural pressure is greater than intrapulmonary pressure. C. atmospheric pressure is greater than intrapulmonary pressure. D. intrapleural pressure is greater than atmospheric pressure.
Pain receptors differ from other somatic receptors by
A) being stimulated only when pain comes from skeletal muscle. B) adapting very little, if at all. C) adapting much more than other receptors. D) not being able to project impulses back to their origin.
The serous fluid within the pericardial cavity works to
A. slow the heart rate. B. lubricate membranes of the pericardium. C. equalize the pressure in the great vessels. D. eliminate blood pressure spikes. E. All of the choices are correct.