Predict the change in peripheral resistance as blood vessel diameter increases.
A. Peripheral resistance decreases.
B. Peripheral resistance increases.
C. Peripheral resistance remains unchanged.
D. Peripheral resistance is constant in humans.
Answer: A. Peripheral resistance decreases.
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Which valve prevents the backflow of blood into the left ventricle when the ventricles relax?
A. Aortic semilunar valve B. Right atrioventricular valve C. Left atrioventricular valve D. Pulmonary semilunar valve E. None of these answers is correct.
Muscle fatigue occurs ________.
A. due to decreased extracellular K+ B. when muscle cell pH increases C. when muscles are only partially able to contract D. when muscle cell glycogen is depleted
Which among the following is a similarity between the Latin American and Asian American culture?
A. Open expression of emotions among men and women is discouraged in both societies. B. Men and women of both these cultures are considered to be promiscuous. C. Family is given significant importance in both cultures. D. Asian American and Latino women have more sexual freedom than their male counterparts.
Electromyography is a diagnostic test used to assess how the muscle responds to what?
A. Heat B. Electric stimuli C. Cold D. Pressure