During the depolarization phase of cardiac muscle
a. voltage-gated potassium channels open.
b. ligand-gated calcium channels open.
c. voltage-gated sodium channels open.
c. voltage-gated sodium channels open.
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The erectile tissue that surrounds the urethra is the
A) membranous urethra. B) penile urethra. C) glans penis. D) corpus spongiosum. E) corpora cavernosa.
Running from the glomerular capsule to the tip of the medullary pyramid is a series of ducts that, together, are referred to as what?
a) vasa recta b) collecting duct c) renal tubule d) glomerulus
Gas, nutrient, and waste exchange occur between the __________ and the tissues of the body
A. arteries B. veins C. capillaries D. capillaries and veins E. capillaries and arteries
Anaplasia is when.
A) cells are undifferentiated. B) cells vary in size and shape and the rate of cell division increases. C) one mature cell type is replaced with a different mature cell type. D) there is an increase in cell numbers.