Which of the following is a result of increased sympathetic stimulation of vascular smooth muscle?
A. Filtration of fluid from capillaries to interstitial fluid increases.
B. Total peripheral resistance (TPR) decreases.
C. The percentage of blood volume in the veins increases.
D. Blood flow to the brain decreases.
E. Venous return of blood to the heart increases.
E
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Extracellular calcium plays a role in contraction inA) skeletal muscle cells.B) smooth muscle cells.C) cardiac muscle cells.D) None of these types of cells.
What will be an ideal response?
A potential benefit of recruiting slow oxidative fibers for contraction before recruiting fast oxidative and fast glycolytic fibers might be ________
A) because they are slower to respond, slow oxidative fibers must be stimulated first in order to contract simultaneously with the faster fibers B) there is little to no benefit from recruiting slow oxidative fibers first and therefore it is in fact fast glycolytic fibers that will be recruited first C) recruiting slow oxidative fibers early helps to tire them out first so that they won't interfere with the more powerful contractions of fast glycolytic fibers D) this will help to allow for fine control with delicate contractile force with a small stimulus
Why does the risk of cancer increase in AIDS patients?
A) Suppressor T cell activity resets the normal immune response. B) Immune surveillance is depressed. C) Cell-mediated immunity is enhanced. D) There is an increase in the circulating antibody levels. E) The virus enters human leukocytes by receptor-mediated endocytosis.
A thickened area of scar tissue that is covered by a shiny, smooth epidermal surface is called
A) a scab. B) a keloid. C) granulation tissue. D) a clot. E) a lesion.