A heart attack occurs when cardiac cells receive an inadequate supply of ____
a. glucose
b. calcium
c. sodium
d. oxygen
e. potassium
ANSWER: d
Biology & Microbiology
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Who developed the modern endosymbiotic theory?
a. Charles Darwin b. Lynn Margulis c. Richard Dickerson d. Wendy Johnson e. Stanley Miller
Biology & Microbiology
Nerve cells in the brain do not undergo mitosis; therefore, which phase of the cell cycle do they stay in throughout the life of the individual?
1.G1
2.S
3.G2
4.cytokinesis
The ____________________ valve is located between the right atrium and ventricle. Fill in the blank(s) with the appropriate word(s)
Biology & Microbiology
Intermediate filaments
A) are 7 nm in diameter. B) can be composed of the protein vimentin. C) are abundant in plant cells. D) are the only cytoskeletal filament responsible for animal cell shape. E) A, B, C, and D.
Biology & Microbiology