Blood is pumped from the heart to the lungs by the

A) left atrium.
B) right atrium.
C) left ventricle.
D) right ventricle.


Answer: D

Biology & Microbiology

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A muscle contraction that develops tension but doesn't shorten is

a. isometric. b. isotonic. c. eccentric. d. heliocentric. e. dynamic.

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The electron shells of atoms hold eight electrons each

Indicate whether the statement is true or false

Biology & Microbiology

A human egg contains:

A) 22 autosomes and one X chromosome. B) 22 autosomes and an X or a Y chromosome. C) 23 autosomes and an X or a Y chromosome. D) 46 chromosomes, as 23 pairs. E) 22 pairs of autosomes and two X chromosomes.

Biology & Microbiology

The first day of football practice was rough on the squad. During practice, the players complained of cramps and sore muscles. Although there is evidence to suggest that many different factors may contribute to this, which of the following is most likely to play a role in the soreness?

A. carbon monoxide B. alcohol C. lactate D. carbon dioxide E. glucose

Biology & Microbiology