Target tissues often have receptors for multiple hormones. The response of the target tissue may depend on ____
a. blood levels of and coordinated activities of several hormones secreted by different glands, only
b. blood levels of the hormones that affect it only
c. coordinated activities of several hormones secreted by different glands only
d. the effects of other signaling molecules, such as prostaglandins only
e. blood levels of, coordinated activities of several hormones secreted by different glands, and the effects of other
signaling molecules, such as prostaglandins
ANSWER: e
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Creutzfeldt-Jacob disease is known to have been transmitted by surgical instruments and transplanted nerve tissue.
Answer the following statement true (T) or false (F)
An examination of fossil records shows that three modern species all had a common ancestor. This is an example of
A. polyploidy. B. divergent evolution. C. convergent evolution. D. three subspecies.
Epinephrine blocks the contraction of muscles in the airways. Which of the other activities of epinephrine is most likely to be regulated by the same type of pathway?
A. promotes the breakdown of glycogen in skeletal muscle cells B. stimulation of heart muscle cell contraction C. increased sweating D. inhibition of saliva production in salivary glands E. contraction of smooth muscle cells in blood vessels
Which of the following is a primary advantage of semisynthetic drugs?
A) They are less stable and consequently have fewer side effects. B) They work faster. C) They are more effective than the unmodified natural antibiotics. D) They must be administered intravenously. E) They are not readily absorbed.