Given the following list of organic molecules, which includes hormones?
1. nucleic acid derivatives
2. polypeptides
3. steroids
4. proteins
A) 1, 3, 4
B) 1, 2, 3
C) 2, 3, 4
D) 1, 2, 3, 4
E) 1, 2, 4
Answer: C) 2, 3, 4
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Loss of cell cycle control can cause cancer.
Answer the following statement true (T) or false (F)
A local potential
A. does not occur until threshold. B. transmits information from one cell to another. C. might be a depolarization event but cannot be a hyperpolarization event. D. increases or decreases in direct proportion to the stimulus strength. E. does not alter resting membrane potential.
An incompetent mitral valve may cause blood to back up into the
A. aorta. B. left atrium. C. left ventricle. D. coronary circulation. E. right atrium.
Lymphatic vessels are structurally similar to what other vessels found in the body?
A) arteries B) veins C) capillaries D) None of the listed responses is correct.