In which of the following diseases does a virus
infect and kill motor neurons?
a. polio
b. amyotrophic lateral sclerosis
c. Duchenne muscular dystrophy
d. multiple sclerosis
e. fibromyalgia
A
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In the dark, the Na+ channels in the outer segments of rod cells are
A. open. B. closed. C. primarily affected by inhibitory neurotransmitter input. D. important in making the cell hyperpolarized in this resting state.
__________ molecule(s) can be detected as it (they)
pass(es) through the human body and is (are) used for diagnosis. a. A decay b. A tracer c. An electron d. An atomic e. Both the proton and electron
The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed three-chambered hearts (two atria, one ventricle)
Birds and mammals, however, are alike in having four-chambered hearts (two atria, two ventricles). The four-chambered hearts of birds and mammals are best described as _____. A) structural homologies B) vestiges C) homoplasies D) the result of shared ancestry
Someone who lives next to a bell tower doesn't even notice the chiming of the bells after a while. This is an example of ________
Fill in the blank(s) with correct word