Which cells have a primary role in cell-mediated immunity?
A) B cells
B) T cells
C) NK cells
D) antigens
E) plasma cells
B) T cells
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Which of the following is not a trigger for mass movements of the colon?
A. Chyme filling the duodenum B. Chyme filling the stomach C. The duodenocolic reflex D. The gastrocolic reflex E. The colorectal reflex
A cell's ability to replenish ATP is reduced by a metabolic poison. Which organelle is being affected?
A. nucleus B. mitochondrion C. centriole D. ribosomes E. microtubule
Myosin light-chain phosphatase is an enzyme that dephosphorylates the myosin heads in smooth muscle, which stops ATPase activity and fosters relaxation of smooth muscle
Indicate whether this statement is true or false.
If the sodium-potassium pumps in the cell membrane of a neuron fail to function, over time
A) the membrane resting potential will become more positive than normal. B) the intracellular concentration of sodium ion will increase. C) the extracellular concentration of potassium ion will increase. D) All of the answers are correct.