Which of the following molecules is incorrectly matched with its function?
a. T cell ? cell-mediated immunity
b. neutrophil ? phagocytosis
c. B cell ? antibody-mediated immunity
d. basophil ? allergy
e. T cell ? antibody-mediated immunity
E
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During the process of community succession,
according to the traditional view, a. the total biomass remains constant. b. succession culminates in a climax community c. the pioneer community gives way quickly to the climax community, followed by a succession of more diverse arrays of organisms. d. nutrients cycle more rapidly with time. e. all of these occur.
The chorion develops from the
a. trophoblast. b. blastocyst. c. blastomere. d. gastrula. e. morula.
____________________ are open channels that connect the cytoplasm of muscle cells and permit rapid transfer of ions and small molecules between them.
Fill in the blank(s) with the appropriate word(s).
The stimulation of a motor neuron ultimately results in the release of a neurotransmitter at the synapse between the neuron and a muscle cell. How is the chemical signal converted into an electrical signal in the postsynaptic muscle cell?
What will be an ideal response?