Which of the following membrane-enclosed organelles can engulf a worn-out organelle, digest its chemical components, and recycle those digested components?
a) peroxisomes
b) mitochondria
c) proteasome
d) ribosomes
e) lysosomes
Answer: e
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Non-steroid hormones are produced by the adrenal glands, the ovaries, and the testes.
a. true b. false
If there is a physiologic level of antidiuretic hormone in the bloodstream, then:
A) blood pressure decreases secondary to dilation of the vessels. B) the renal tubules are stimulated to reabsorb sodium and water. C) potassium, phosphorus, and magnesium are lost through diuresis. D) the kidneys excrete excessive sodium and water from the body.
The wall(s) of the ________ rest(s) on the diaphragm
A) left atrium B) left ventricle C) right atrium D) right ventricle E) right and left ventricles
Reflex arcs
A. are capable of receiving a stimulus and yielding a response. B. are the basic structural units of the nervous system. C. occur primarily in the cerebral cortex of the brain. D. involve inhibitory neurons. E. do not involve the spinal cord.