Which does NOT accurately describe interferons?
A. They are proteins produced by most cells of the body in response to infection by a virus.
B. They interfere with viral replication in cells.
C. They play a role in the killing of tumor cells.
D. They kill bacteria by forming pores in the cell membrane.
E. They bind to surface receptors on cells, and trigger cellular production of antiviral proteins.
D
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The vestibulocochlear nerve passes through which of the following openings?
A. External acoustic meatus B. Internal acoustic meatus C. Foramen ovale D. Foramen rotundum E. Carotid canal
The reflex that prevents a muscle from exerting too much tension is the
A) tendon reflex. B) stretch reflex. C) crossed extensor reflex. D) reciprocal reflex. E) flexor reflex.
Which of the following statements concerning metabolic reactions is true?
A. Anabolic reactions release energy. B. Catabolic reactions are synthesis reactions. C. The energy derived from anabolism is used to drive catabolism. D. Catabolic reactions consume energy. E. Anabolic reactions are involved in the production of proteins from amino acids.
Calcitonin is produced by:
A) parafollicular cells B) parathyroid cells C) follicular cells D) hypothalamus