The component of the plasma membrane that acts as a selective barrier to diffusion of polar molecules is the integral proteins.
Answer the following statement true (T) or false (F)
False
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How does fluid accumulation in the lungs affect vital capacity?
A) Vital capacity increases in females but not in males. B) Vital capacity decreases in females but not in males. C) Vital capacity increases in both sexes equally. D) Vital capacity decreases in both sexes equally. E) Accumulating fluid has no effect on vital capacity.
All reflexes
A) have a reflex arc. B) occur in the spinal cord. C) have interneurons. D) have association neurons.
What physiological process occurs in the structure labeled "7"?
A) release of neurotransmitter
B) conduction of the action potential into the cell interior
C) activity of acetylcholinesterase
D) release of protein and calcium ions into the muscle fiber
E) opening of sodium channels and subsequent influx of sodium
A ________ epithelium consists of a single layer of flattened cells attached directly to a basement membrane.
A. stratified cuboidal B. simple columnar C. stratified squamous D. simple squamous E. simple cuboidal