Which of the following provides a first line of defense against pathogens?
a. complement
b. intact skin and mucous membranes
c. antimicrobial proteins
d. inflammation
Answer: b. intact skin and mucous membranes
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Factors that are necessary for proper bone formation include all of the following, except
A) vitamin A. B) vitamin E. C) vitamin C. D) the hormone thyroxine. E) vitamin D.
The size of an EPSP is independent of the amount of excitatory neurotransmitter that is released by the presynaptic cell
Indicate whether this statement is true or false.
The protein found in large amounts in the outermost layer of epidermal cells is collagen
Indicate whether the statement is true or false
Describe the effects of the concentration and electrical gradients on the movement of Na+ and K+ ions through the membrane
What will be an ideal response?