What first happens to a neuron as an impulse passes
along it is best described as
a. polarization.
b. depolarization.
c. ionization.
d. hyperpolarization.
e. transpolarization.
Answer: b
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Indirect methods for measuring mutation rates make inferences from levels of genetic variation between and among ____________________
Fill in the blank(s) with correct word
Homologous genes in different species are called
A. analogs. B. paralogs. C. orthologs. D. dialogs. E. monologs.
In the alveoli
A. both oxygen and carbon dioxide diffuse into the blood. B. both oxygen and carbon dioxide diffuse out of the blood. C. oxygen diffuses into the blood while carbon dioxide diffuses out of the blood. D. no exchange with the blood occurs. E. oxygen diffuses out of the blood while carbon dioxide diffuses into the blood.