Define and describe the mechanism of myogenic autoregulation.
What will be an ideal response?
Myogenic autoregulation is the self-regulation by the vascular smooth muscle in response to an increase in blood pressure.
The mechanism responsible for the intrinsic response of vascular smooth muscle is stretch that opens mechanically gated Ca2+ channels in the muscle membrane. Calcium entering the smooth muscle cell combines with calmodulin and activates myosin light chain kinase, which in turn increases myosin ATPase activity and crossbridge activity.
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Generally, the third vessel to branch off the abdominal descending aorta is the
A. celiac artery. B. IMA. C. right renal artery. D. left renal artery. E. SMA.
Which of the following best describes the events occurring at point B in the diagram of deep wound healing shown below?
a) Blood clot is forming. b) New collagen fibers are forming. c) Damaged blood vessels are being repaired. d) Epithelium is migrating across wound. e) Scar tissue is forming.
In the figure of a sagittal section of a fingernail shown, where is the lunula?
a) A b) B c) C d) D e) E
Another term for antibodies is
A) cytokines. B) cytosolic factors. C) interleukins. D) interferons. E) immunoglobulins.