The net movement of water molecules remain in equilibrium when the cell is paced in:
Correct answer: C. Isotonic solution
- A. Hypotonic solution
- B. Hypertonic solution
- C. Isotonic solution
- D. None
Explanation
The correct answer is an isotonic solution. In this type of solution, the concentration of solutes is the same inside and outside the cell, leading to a net movement of zero for water molecules. This equilibrium state means water enters and exits the cell at the same rate. In contrast, a hypotonic solution leads to water entering the cell, while a hypertonic solution causes water to leave the cell. The option 'None' is incorrect because isotonic solutions do indeed exist and are a key concept in understanding cellular homeostasis.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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