Not all phagocytic cells are antigen-presenting cells. B cells, macrophages, and dendritic cells differ from neutrophils in that they synthesize ________ .
A. MHC-I receptors
B. MHC-II receptors
C. CD4 receptors
D. interleukin-2
E. CD8 receptors
Answer: B
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Which premise used by Darwin in his theory is
INCORRECTLY stated below? a. More offspring are produced than will survive to reproduce. b. Members of populations show heritable variation. c. Some varieties have a better chance to survive and reproduce. d. Organisms that possess advantageous traits have a decreased chance of producing offspring. e. Some traits become more common because their bearers contribute more offspring to the next generation.
Pheromones are detected in the ____
a. nasal epithelium b. vomeronasal organ c. olfactory bulb d. thalamus e. cerebral cortex
When calcium levels in the blood are low, the ________ produces ________, which stimulates the breakdown of bone, releasing calcium.
A. pancreas; glucagon B. adrenal glands; norepinephrine C. pituitary gland; growth hormone D. parathyroid gland; parathyroid hormone E. adrenal glands; aldosterone
A chemical reaction in which a water molecule is a reactant is known as a (dehydration/hydrolysis) reaction
What will be an ideal response?