Most hydrogen ions are secreted
A) passively into the proximal convoluted tubule.
B) actively from the distal convoluted tubule.
C) passively from the distal convoluted tubule.
D) actively into the entire renal tubule.
D
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A lack of exercise could
A) cause bones to become thicker. B) cause bones to store more calcium. C) result in porous and weak bones. D) cause bones to become longer. E) cause bones to lose their medullary cavity.
Single-unit smooth muscle
a. contains an abundance of gap junctions b. is self-excitable c. is found in the walls of the digestive, reproductive, and urinary tracts and small blood vessels d. forms functional syncytia e. has all of the above characteristics
A muscle strain is a sustained contraction of the muscle.?
Indicate whether the statement is true or false
A cell undergoing ________ loses its shape, forms bubble, and falls apart.
Fill in the blank(s) with the appropriate word(s).