Which of the following cell structures would be most important in secretory epithelial cells?
A. Golgi apparatus
B. Cilia
C. Lysosomes
D. Desmosomes
E. Microtubules
Answer: A
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Continuous conduction of a nerve impulse occurs only along
A. axons in the PNS. B. axons in the CNS. C. unmyelinated axons. D. myelinated axons. E. dendrites.
Epinephrine and norepinephrine are secreted by
A. gamma cells. B. chief cells. C. C cells. D. oxyphil cells. E. chromaffin cells.
The probability of a reaction occurring is increased
A. by decreasing reactant concentrations. B. by increasing the activation energy. C. by increasing the concentration of any of the products. D. if the reaction uses a great deal of energy. E. if the concentration of one of the reactants increases.
What does "C" represent on the diagram?
A. Repolarization phase of action potential B. Depolarization phase of action potential C. Depolarization D. Threshold