Under anaerobic conditions, muscle cells produce ____.
a. ethyl alcohol
b. pyruvate
c. acetaldehyde
d. citrate
e. lactate
Ans: e. lactate
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Which one of the following is the organ of the inner ear that contains hair cells which convert fluid pressure waves to nerve impulses?
A. vestibular System B. semicircular canals C. organ of Corti D. statolith
The initial stages of the inflammatory response are characterized by
A. the release of cytokines. B. vasodilation. C. leukocyte movement through the capillary wall. D. the release of nitric oxide from endothelial cells. E. All of these statements are correct.
What is host plant resistance?
A. Producing large quantities of seeds in some years. B. The ability to prevent herbivory through various defenses. C. A form of crypsis practiced by tropical rain forest plants. D. The secretion of chemicals that are toxic to competing plant species. E. The ability of plants to grow taller than their competitors.
A brief reversal of the electric gradient across
the plasma membrane is called
a. a threshold potential. b. an action potential. c. a reverse potential. d. a resting potential. e. an ionic potential