Peristaltic waves are ________
A) churning movements of the gastrointestinal tract that aid in mechanical breakdown of chyme
B) segmental regions of the gastrointestinal tract
C) waves of muscular contractions that propel contents from one point to another
D) pendular movements of the gastrointestinal tract
C
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Fluid flowing from point H in the figure will go to which structure next?
a) L b) B c) I d) G e) N
What do the receptors for hearing, static equilibrium, and dynamic equilibrium all have in common?
A) The receptors do not adapt to continuous stimulation. B) All of the receptor cells have stereocilia. C) All of the receptors are nociceptors. D) These are all general sense receptors. E) These receptors send action potentials to the same area of the brain for processing.
Standing still in an elevator that suddenly lowers stimulates receptors in the:
A) spiral organ (organ of Corti). B) bony labyrinth. C) utricle and saccule. D) basilar membrane.
From which primary germ layer does the epithelial lining of the digestive system and the blood vessels develop?
A. Mesoderm B. Endoderm C. Ectoderm D. None of these choices are correct for both systems.