When macrophages bind antigens, they secrete ____ to attract more phagocytic cells
a. more antigens
b. MHC
c. cytokines
d. antibodies
e. complement
ANSWER: c
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Synapsis is best described as:
A. the exchange of genetic information between sister chromatids. B. the alignment of non-sister chromatids at the metaphase plate. C. the exchange of genetic information between non-sister chromatids. D. the alignment of homologous chromosomes in prophase 1.
The process by which organisms maintain a stable internal environment in the face of a fluctuating external environment is called
A. metabolism. B. cellular respiration. C. growth and development. D. homeostasis. E. functional proteomics and genomics.
Which of the following is characteristic of slow-twitch fibers but not fast-twitch fibers?
A. Have few blood vessels B. Contract quickly C. Breakdown ATP slowly D. Store large amounts of glycogen E. Make up "white" muscle
When does the glottis close?
What will be an ideal response?