Which cells can be activated by direct contact with virus-infected cells?
A) helper T and helper B cells
B) memory T and memory B cells
C) cytotoxic T and memory B cells
D) cytotoxic T and natural killer cells
E) helper T and plasma cells
Answer: D
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A newborn is protected against certain digestive and respiratory infections by IgA received via the mother's
A. milk. B. placenta. C. blood. D. intestine.
A female goat is called a ______________ or __________________
Fill in the blank(s) with correct word
The full closure of bone growth plates occurs during:
a. late childhood b. early adolescence c. late adolescence d. early adulthood
If a person is severely dehydrated, their extracellular fluids will become hypertonic to the intracellular fluid. What do you predict will happen to the person’s cells?
A) The cells will lose water and shrink. B) The cells will rupture. C) Extracellular fluids do not impact cell size, because cells contain intracellular fluid. D) The cells will swell.