Osmosis is defined as:
Correct answer: B. Flow of solvent through semi-permeable membrane from less to higher concentrated solution
- A. Flow of solvent through semi-permeable membrane from higher to less concentrated solution
- B. Flow of solvent through semi-permeable membrane from less to higher concentrated solution
- C. Flow of a solute from a semi-permeable membrane
- D. Flow of water without membrane
Explanation
Osmosis is the movement of a solvent, typically water, across a semi-permeable membrane from a region of lower solute concentration to a region of higher solute concentration. This process continues until equilibrium is reached. The correct option (B) accurately describes this process. Option A incorrectly suggests the movement is from higher to lower concentration, while Option C incorrectly refers to solute movement. Option D ignores the essential role of the semi-permeable membrane in osmosis.
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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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