Which of the following is the effect of a hypertonic solution on a red blood cell?
The volume of the cell decreases
The permeability of the cell membrane decreases
The permeability of the cell membrane increases.
The volume of the cell increases.
The Correct Answer is A
a. The volume of the cell decreases: When a red blood cell is placed in a hypertonic solution (solution with a higher concentration of solutes outside the cell compared to inside), water will move out of the cell through osmosis to equalize the concentration on both sides of the cell membrane. This movement of water causes the red blood cell to shrink (crenate).
b. The permeability of the cell membrane decreases: Incorrect. The permeability of the cell membrane to water remains relatively constant.
c. The permeability of the cell membrane increases: Incorrect. Osmosis is a passive process that doesn't require increased permeability.
d. The volume of the cell increases: Incorrect. A hypertonic solution will cause the cell to lose water and shrink.
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Related Questions
Correct Answer is D
Explanation
a: Contracts and brings about movement - This describes the function of muscle tissue, not connective tissue.
b: Generates and transmits impulses - This describes the function of nervous tissue, not connective tissue.
c: Covers and lines body surfaces - This describes the function of epithelial tissue, not connective tissue
d. Binds tissue together and supports structures: Connective tissue serves to bind, support, and protect other tissues and organs of the body. It also plays a role in insulation, storing energy, and transporting substances.
Correct Answer is C
Explanation
a: Basal ganglia - The basal ganglia are involved in motor control and coordination but not in respiratory regulation.
b: Parietal lobe - The parietal lobe is involved in sensory processing and spatial awareness but not in respiratory regulation.
c. Medulla: The medulla oblongata, specifically the respiratory center within it, is responsible for the involuntary control of respiration, including setting the basic rhythm of breathing and responding to changes in blood pH and oxygen levels.
d: Hypothalamus - The hypothalamus regulates various physiological processes, including temperature regulation and hormone secretion, but not respiration.
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