In the process of diffusion, net movement of substances is always from a region
A. outside the cell to a region inside the cell.
B. inside the cell to a region outside the cell.
C. of lower concentration to a region of higher concentration.
D. of higher concentration to a region of lower concentration.
E. None of these choices are correct.
D
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What transport process uses the energy stored in a Na+ or H+ concentration gradient to drive other substances across the membrane against their own concentration gradients?
a) primary active transport b) secondary active transport c) facilitated diffusion d) passive diffusion e) osmosis
A component of blood cells called a Barr body represents a(n):
a. Aggregation of ribosomes in reticulocytes b. Clump of polymerized hemoglobin c. Cytoplasmic inclusion found in eosinophils d. Enlarged phagocytic vesicle found in neutrophils e. Inactivated X chromosome extending from the nucleus in neutrophils
Neuromuscular disorders and electrocardiographic abnormalities can result from ________.
A. hypokalemia B. excessive use of thiazide diuretics C. excessive use of loop diuretics D. All of the choices are correct.
Select components of the neuronal pathway for balance. (Check all that apply.)
A. Vestibulocochlear nerve B. Vestibular nucleus C. Thalamus D. Facial nerve ganglion