The survival needs of the human body include ________.
A. food, water, oxygen, body temperature, and atmospheric pressure.
B. food, water, and oxygen.
C. food, water, and the appropriate atmosphere containing oxygen and adequate pressure.
D. food, water, oxygen, and the appropriate environmental conditions.
Answer: A
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If pure water and a solution containing a nonpenetrating solute are separated by a membrane that is permeable only to water, what would occur?
A. Water will diffuse by osmosis until all of the water is on the same side as the solute. B. No movement will occur between the compartments. C. Water will diffuse by osmosis toward the side with the solute, until stopped by opposing hydrostatic pressure. D. Water will diffuse by osmosis away from the side with the solute, until stopped by hydrostatic pressure. E. Water will diffuse by osmosis until the water concentrations in the two compartments become equal.
Answer the following statements true (T) or false (F)
1. About 20% of the blood pumped by the heart enters the kidneys. 2. The medulla is the inner part of the kidney. 3. The cortex is the inner part of the kidney. 4. The pyramids are expansions of the upper end of the ureters. 5. The pyramids are the triangular divisions of the medulla of the kidney.
The tissue phagocytes, macrophages are derived from which agranulocyte?
a. neutrophils. b. eosinophils. c. basophils. d. lymphocytes. e. monocytes.
What is the function of ependymal cells?
A. They produce the myelin sheath around axons of the peripheral nervous system. B. They are the phagocytes of the brain. C. They support the cell bodies of neurons in peripheral ganglia. D. They produce cerebrospinal fluid, and circulate it around the brain and spinal cord. E. They produce the myelin sheath around axons of the central nervous system.