What happens when the ventricular blood pressure rises during ventricular contraction?
a. Aortic and pulmonary valves open.
b. Atrioventricular valves open.
c. The atria fill with blood.
d. Aortic and pulmonary valves close.
e. The ventricle passively fills with blood.
a
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C3a and C5a are involved in
A. inflammation. B. interferon production. C. properdin activation. D. attraction of phagocytes. E. inflammation AND attraction of phagocytes.
Bacterial cultures with a large number of genetically identical cells are called:
a. clone cultures. b. equal cultures. c. simple cultures. d. identical cultures. e. fresh cultures.
A circular molecule of DNA devoid of any histone proteins describes the chromosome of a (an)
A. protozoa. B. flowering plants. C. insects. D. bacteria. E. yeasts.
Membrane-bound sac, larger than a vesicle; usually functions in storage and can contain a variety of substances. In plants, the central vacuole fills much of the interior of the cell.
What will be an ideal response?