What vitamin is required to synthesize retinal?
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin E
A. Vitamin A
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Which statement best describes the goal of medications used to treat myasthenia gravis?
A. To increase the number of acetylcholine receptors B. To decrease the number of synaptic vesicles C. To promote multiple motor unit summation D. To inhibit Ca2+ release from the sarcoplasmic reticulum E. To inhibit the function of cholinesterase
When one or more presynaptic neurons fire in rapid order it produces a much greater depolarization of the postsynaptic membrane than would result from a single EPSP; this event is called ________ summation
Fill in the blanks with correct word
Active hyperemia refers to
a. arteriolar dilation in response to local chemical changes that accompany increased metabolic activity of the tissue b. local arteriolar mechanisms that are aimed at keeping tissue blood flow fairly constant in spite of wide deviations in mean arterial driving pressure c. the increase in blood flow to a tissue that occurs after removal of an occlusion of its blood supply d. maintaining adequate mean arterial pressure to drive blood forward into a tissue e. none of the above
The bundle of His and Purkinje system facilitate the rapid spread of the action potential throughout the ventricles
Indicate whether the statement is true or false