When light strikes rhodopsin, the retinal is converted
A. from cis to trans, and retinal and opsin combine.
B. from cis to trans, and retinal and opsin disassociate.
C. from trans to cis, and retinal and opsin combine.
D. from trans to cis, and retinal and opsin disassociate.
B
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Every substance that enters or leaves the internal environment of the body must cross an epithelium.
A) True B) False
A fellow student has an allergy to grass pollen. Which of the following leukocytes is most active in this student during an allergic reaction?
A) neutrophils B) monocytes C) eosinophils D) basophils
The ________ gland is a modified sudoriferous gland that secretes wax.
A) eccrine B) apocrine C) ceruminous D) mammary
What do the nerve fibers of the olfactory tracts lead to?
A. The temporal lobe B. The midbrain C. The parietal lobes D. The thalamus E. The precentral gyrus