Materials can move across capillary walls by
A) diffusion.
B) filtration.
C) reabsorption.
D) All of the answers are correct.
E) None of the answers is correct.
Answer: D
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Transmission of sound through the middle ear results in
a. amplification of the pressure vibrations. b. stimulation of middle ear receptor cells. c. opening of the Eustachian tube. d. increased firing rate in sensory axons associated with the tympanic membrane. e. none of these answers.
_____ was the author of Studies in the Psychology of Sex
A. Richard von Krafft-Ebing B. Henry Havelock Ellis C. Magnus Hirschfeld D. Sigmund Freud
In some cells, an afterpotential occurs because
A. the extracellular Na+ concentration is reduced. B. the permeability to Na+ continues longer than necessary. C. the Na+ continue to enter the cell after depolarization is finished. D. there is prolonged, elevated permeability to K+ during repolarization. E. the sodium-potassium pump is actively exchanging ions across the membrane.
Which organ belongs to more than one organ system?
A) Pancreas B) Larynx C) Stomach D) Urinary bladder