Tom suffers from hypertension (high blood pressure). Which of the following might help deal with his problem?
A) a drug that blocks alpha-1 receptors in smooth muscle
B) a drug that blocks alpha-2 receptors in adipose tissue
C) a drug that increases cAMP levels in cardiac muscle tissue
D) a drug that blocks beta receptors in cardiac muscle tissue
E) a drug that blocks alpha-1 receptors in smooth muscle and blocks beta receptors in cardiac muscle tissue
E
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A secondary oocyte arrests in
A. prophase I. B. anaphase II. C. metaphase I. D. prophase II. E. metaphase II.
To initiate a smooth muscle cell contraction, calcium enters the cell and binds to
A. troponin, which then activates myosin light-chain kinase. B. calmodulin, which then binds to and activates myosin light-chain kinase. C. a myosin head, which then activates calmodulin. D. myosin light-chain kinase, which then hydrolyzes ATP. E. a phosphatase, which then removes the tropomyosin blockade.
Sweat and salivary gland are endocrine glands
Indicate whether the statement is true or false
Threshold potential is the peak potential achieved during an action potential
Indicate whether the statement is true or false