Lymphocyte activation can occur in several ways. However, in all cases
A. helper T cells are activated first and they then stimulate other cells.
B. antigen-presenting cells process the antigen and present it to the lymphocytes.
C. antigens must be able to recognize the lymphocytes.
D. lymphocytes must recognize an antigen.
E. cytokines released by the antigen stimulate the lymphocyte response.
Answer: D
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Which is NOT a transport mechanism typically seen in renal tubular epithelial cells?
A. Transport proteins that move glucose by facilitated diffusion from inside of proximal tubule cells into the renal interstitial fluid B. Na+-K+ ATPase pumps in the luminal membrane of proximal tubule epithelial cells that move Na+ from inside the cell into the tubule and K+ from the tubule lumen into the cell C. Countertransport proteins that move Na+ into proximal tubule epithelial cells while moving H+ from the cells into the lumen D. Ion channels that allow Na+ to move by diffusion from the lumen of the proximal tubule into epithelial cells E. Cotransport proteins in the luminal membrane of the proximal tubule that move Na+ and glucose from the proximal tubule into epithelial cells
Fat burning causes an accumulation of acetyl CoA, which the liver converts to ________.
Fill in the blank(s) with the appropriate word(s).
Which term below best describes an excitable when a resting membrane potential is present?
a. polarized. b. depolarized. c. hyperpolarized. d. repolarized. e. nonpolarized.
Diseases of the respiratory or circulatory systems that impair oxygen delivery to body cells will diminish ATP production in those cells.
Answer the following statement true (T) or false (F)