The major types of enteric neurons include all of the following, except ______________
A. neurons that detect changes in chemical composition
B. neurons that stimulate or inhibit smooth muscle contractions
C. neurons that connect sensory and motor neurons
D. neurons that suppress epithelial secretions
D
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The region of the nasal cavity immediately internal to the nostrils is the _________; it contains coarse guard hairs
A. choanae B. olfactory region C. vestibule D. respiratory region E. nasopharynx
In the visual pathways to the brain, the optic radiations project to the ________
A) primary visual cortex B) medial retina C) lateral geniculate body D) optic chiasma
Virus-infected cells release
A) complement. B) heparin. C) interferon. D) pyrogens. E) perforins.
Some epiblast cells migrate and emerge between the epiblast and endoderm as a new germ layer called the
A. yolk sac. B. mesoglia. C. notochord. D. mesoderm. E. primitive streak.