Complement proteins, which are activated when IgG or IgM antibodies bind antigen,
A. cause lysis of the T cells.
B. stimulate chemotaxis, in which neutrophils and macrophages are repelled from the affected area.
C. stimulate cytokine release.
D. cause opsonization, which coats the antibody-antigen complexes in a way that attracts phagocytes.
Answer: D
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The forearm includes the
A. radius. B. radius and ulna. C. radius, ulna, and carpal bones. D. radius, ulna, carpal bones, and hand.
Which of the following is characteristic of carbohydrates?
A. They include sugars and starches. B. They contain C, H, O, with twice as many hydrogen as oxygen atoms. C. They provide much of the energy that the cell requires. D. All of the answer choices are correct.
During electron transport, how many ATP can be generated from the energy contributed by a molecule of NADH?
A. 1 B. 2 C. 3 D. 30 E. 36
Acetylcholinesterase is classified as a(n) ____
a. hormone b. neurotransmitter c. enzyme d. fatty acid e. amino acid