Curare
a. strongly binds to acetylcholine receptor sites
b. inhibits acetylcholinesterase
c. is found in pesticides and military nerve gases
d. has characteristics a and b
e. has characteristics b and c
A
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At rest, a normal person breathes about ________ times per minute.
A. 26 B. 16 C. 50 D. 8 E. 32
During times of thermal stress, heat shock proteins act as
A) Chaperones to assist in the refolding of proteins. B) Transcriptional activators that ultimately lead to altered membrane lipids. C) Intercellular cytokine messengers that trigger adaptive responses in adjoining cells. D) More than one of the above
A female wants to take a hormonal contraceptive that contains progesterone only. What could be an option?
A) spermicide B) skin patches from ORTHO-EVRA C) intramuscular injections of the Depo-Provera shot D) vaginal rings from NuvaRing
Chemoreceptors located in the carotid bodies and aortic arch sense minute changes in the ______ and send signals to the respiratory centers via the _______________ nerves.
A) PaO2, vagus and intercostal B) PaCO2, glossopharyngeal and vagus C) PaCO2, phrenic and glossopharyngeal D) PaO2, hypoglossal, vagus, and intercostal