Which of the following statements about autoregulation is NOT true?
A) In tubuloglomerular feedback, stretch-sensitive ion channels open, resulting in depolarization of smooth muscle cells.
B) In myogenic response, the macula densa cells send a paracrine message to the neighboring afferent arteriole.
C) Myogenic response is the intrinsic ability of vascular smooth muscle to respond to pressure changes.
D) Myogenic response is a paracrine signaling mechanism.
C) Myogenic response is the intrinsic ability of vascular smooth muscle to respond to pressure changes.
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Which portion of the peritoneum drapes over the transverse colon and coils of the small intestine?
a) Greater omentum b) Falciform ligament c) Lesser omentum d) Mesentery e) Mesocolon
Normal blood pH is maintained within a range of
A. 1.0 - 14.0. B. 4.5 - 5.5. C. 7.35 - 8.5. D. 6.5 - 9.5. E. 7.35 - 7.45.
What is perforin?
A) a type of antibody synthesized by B cells B) a protein produced by NK cells C) a type of interferon D) a toxin expressed by some pathogens that is capable of damaging healthy cells E) a destructive enzyme secreted by sebaceous glands
Proteins are complex molecules composed of
A) glucose B) water C) amino acids D) calcium