Natural killer cells destroy target cells by:
a. releasing antibiotics, which break down the cell membranes.
b. releasing cytokines and enzymes that trigger apoptosis.
c. releasing histamine, which signals other blood cells to aggregate.
d. phagocytosis, after the cells are targeted by antibodies.
e. releasing lysosomal enzymes, which digest the target cells.
b
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Normal blood pressure for an 8-year-old boy is 100/67 mm Hg. The systolic blood pressure is
(a) 33 mm Hg. (b) 100 mm Hg. (c) 67 mm Hg. (d) 167 mm Hg.
Which molecules coat the inside of the cytosolic membrane to help form endocytic vesicles?
a. clathrins b. cholesterols c. antibodies d. aquaporins e. microtubules
What legal restrictions on the use of PGD are in place in the United States?
A. It has been banned across the board. B. It can only be used to prevent implantation if the disease diagnosed has a 100 percent chance of occurring with the genotype revealed. C. It cannot be used for sex selection. D. It cannot be used for screening embryos to be tissue donors. E. None of these are legal restrictions currently in place in the United States.
Selective uptake of molecules into a cell by vacuole formation after they bind to specific receptor proteins in the plasma membrane.
What will be an ideal response?