In an inflammatory response, the direct effect of histamine is to ____
a. dilate blood vessels causing increased blood flow to the area of infection
b. decrease heat accumulation in the area of infection
c. directly kill bacteria
d. attack cytotoxic T cells
e. cause B cells to release antibodies
a
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Histones:
A. have highly conserved sequences among eukaryotes. B. are rich in basic amino acids; about 25% of the total amino acids are lysine and arginine. C. are small proteins, ranging in molecular weight from 11,000 to 21,000. D. contain a histone-fold motif comprised of three ?-helices linked by two short loops. E. All of these choices are correct.
When a presented antigen fragment interacts with the T cell receptor of a helper T cell, the co-receptor that must also participate to finalize recognition is ________.
A. MHC I B. CD8 C. CD4 D. All of the choices are correct.
If you see a red flower with very little odor, it is likely pollinated by ____
a. flies b. birds c. bats or moths d. butterflies e. bees
Bacterial infections that reach the kidneys can result in which serious complication?
A) malignancies of the kidney B) bacteremia as bacteria use the renal blood vessels to enter wider circulation C) bacteremia, impaired renal function, and malignancies D) impaired renal function due to scar tissue E) bacteremia and impaired renal function