The maintenance of a relatively constant internal environment is termed:
A) homeostasis. B) positive feedback. C) integration. D) effector control.
Answer: A
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Diastolic blood pressure represents ________
A) the lowest pressure during ventricular diastole when the artery recoils no farther B) the expansion and recoil of the artery walls C) the electrical activity in the heart D) the force exerted by the left ventricle as blood is pumped into the aorta
Estrogen, testosterone, progesterone, mineralocorticoids, and glucocorticoids are examples of what category of hormone?
A. Proteins B. Steroids C. Amino acid derivatives D. All of these answers are correct.
The choroid plexus
A) is the site of production of the cerebrospinal fluid. B) is located on the entire surface area of the brain-ventricle interface. C) is the site of drainage of used cerebrospinal fluid from neural tissues. D) is the site where the spinal nerves first enter the medulla. E) None of the answers are correct
The smallest unit of any element is a(n) ________.
A. molecule B. compound C. atom D. macromolecule E. electron