Blood flow to the right side of the heart muscle decreases due to constriction of the
_____, and decreased blood flow to the heart tissue can result in _____.
A) left coronary artery; mitral valve prolapse
B) left coronary vein; myocardial infarction
C) right pulmonary artery; endocarditis
D) right coronary artery; ischemia
D
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Cells regulate their level of activity by regulating the amount of proteins present in the cell at any given time, so an up regulation of enzymes would be expected to
A) increase the rate of reactions catalyzed by the enzymes. B) increase the level of productivity of chemical reactions that rely on them. C) decrease the rate of reactions catalyzed by the enzymes. D) decrease the level of productivity of chemical reactions that rely on them. E) both decrease the level of productivity of chemical reactions that rely on them and decrease the rate of reactions catalyzed by the enzymes.
Diverging axons amplify an impulse by
A) returning the impulse to the neuron of origin. B) splitting into multiple axons. C) contacting many neurons. D) stimulating themselves.
The secretion of vasopressin increases if the extracellular fluid becomes hypertonic
Indicate whether the statement is true or false
The outside of the resting plasma membrane is __________ relative to the inside of the resting plasma membrane
A. positively charged B. negatively charged C. electrically neutral D. recharged E. None of these choices is correct.