If a substance is a neurotransmitter, stimulation of the presynaptic cell should have the same effect as
a. direct application of the proposed substance to the postsynaptic cell.
b. stimulation of the postsynaptic cell.
c. blocking receptors on the postsynaptic cell.
d. inactivating the substance.
Answer is a. direct application of the proposed substance to the postsynaptic cell.
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Answer the following statements true (T) or false (F)
1. Valley fever is another name for cryptococcosis. 2. The yeast form of Histoplasma capsulatum is quite distinctive because of its large capsule. 3. Both histoplasmosis and cryptococcosis may be acquired by inhalation of dried bat droppings (guano). 4. Molds in the genus Mucor are commonly referred to as bread molds. 5. If a patient is infected with a dimorphic fungus, it is likely that fungal hyphae would be seen in the infected tissues.
What strategy does the body use for blood glucose homeostasis?
A. release of hormones by the brain B. energy stores in bone allow for quick glucose release C. glucose usage by the brain is shut down when necessary D. the action of two antagonistic effectors
According to fossil records, mammals
A. first appeared in the same geologic era, the Mesozoic, as dinosaurs. B. first appeared in the current Quaternary period of the Cenozoic era. C. lived in the same era, the Paleozoic, as reptiles, amphibians, and bony fishes. D. did not appear until the Cenozoic era, after dinosaurs were extinct. E. None of the answer choices is correct.
All microbicidal agents are sterilants.
Answer the following statement true (T) or false (F)