Hormones
a. are all of similar chemical composition
b. combine with specific receptors on the target cell's surface or inside the target cell
c. are secreted at a constant rate
d. all act by activating adenylate cyclase, which transforms ATP into cyclic AMP
e. have all of the above characteristics
B
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RNA synthesis from a DNA template
A. occurs in the nucleolus. B. occurs in the cytoplasm. C. is called transcription of the message. D. requires DNA polymerase. E. is called translation of the message.
The function of the cerebral association areas is
A) to interpret sensations. B) reasoning and judgment. C) to analyze sensory experiences. D) all of the above.
A myelinated axon is shielded from direct contact with the extracellular fluid all along its length
Indicate whether the statement is true or false.
A sample of John's blood shows a high level of pyrogens. This would indicate that John
A) is feeling achy. B) is producing T lymphocytes. C) has a sore throat. D) is running a fever. E) has swollen lymph nodes.