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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
a. QRS wave: The ECG (electrocardiogram) measures the electrical activity of the heart. The QRS complex represents ventricular depolarization, the spread of electrical excitation through the ventricles causing them to contract.
b. P wave: The P wave represents atrial depolarization, the electrical impulse moving through the atria.
c. T wave: The T wave represents ventricular repolarization, the ventricles relaxing after contraction.
d. U wave: The U wave is a small wave of uncertain origin, not related to ventricular depolarization.
Correct Answer is A
Explanation
a. 1 to 2 liters: Correct. The average adult typically produces about 1 to 2 liters of urine per day.
b. 3 to 5 liters: This is an unusually high amount of urine production and is not typical for most adults.
c. 5 to 7 liters: This is an excessively high amount of urine production and would usually indicate a medical condition.
d. 2 to 4 liters: This range is slightly higher than average but can still be considered normal under certain conditions such as increased fluid intake or diuretic use.
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