Which statement about a graded potential is false?
a. It can be a depolarization.
b. It can be a hyperpolarization.
c. It can be summated.
d. It has a refractory period.
e. It occurs in a specialized area of the membrane.
D
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____________________, which is secreted from ____________________, prevents platelets from aggregating
Fill in the blank(s) with correct word
In the stomach, ________ cells secrete pepsinogen.
Fill in the blank(s) with the appropriate word(s).
Which of the following occur as stroke volume increases?
A. Systolic pressure increases more than diastolic pressure. B. Pulse pressure decreases. C. Cardiac output decreases. D. Resistance to blood flow increases. E. The amount of blood sent to systemic circulation decreases.
The diffusion of Ca2+ into a smooth muscle cell does not depolarize the membrane so no action potential occurs.
Answer the following statement true (T) or false (F)