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
You might also like to view...
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.
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.
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.