Fusion of the male and female pronuclei
A. occurs before ovulation.
B. results in an oocyte forming.
C. results in a haploid cell forming.
D. restores the diploid number of chromosomes.
E. results in a total of 23 chromosomes.
Answer: D
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The fibrous skeleton of the heart functions to
A) help distribute the force of contraction of the heart. B) maintain the shape of the heart. C) physically isolating the atrial muscle cells from the ventricular muscle cells. D) reinforcing the heart valves. E) All of the answers are correct.
Exposure to secondhand smoke increases risk of
A) abnormal blood clotting. B) all of the above. C) platelet activation D) damage to the smooth endothelial lining of blood vessels.
The presence of skin blood vessels diminishes the effectiveness of the skin as an insulator
Indicate whether the statement is true or false
Which of the following leukocytes is pale-staining and destroys pathogens by engulfing them via the process of phagocytosis?
A) eosinophils B) neutrophils C) lymphocytes D) basophils