Fluid & Electrolyte Q 3 - Gyan Darpan : Learning Portal
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Wednesday, 30 March 2022

Fluid & Electrolyte Q 3

The net diffusion of water from one solution of water from one solution through a semipermeable membrane to another solution containing a lower concentration of water is termed:
    A. Filtration
    B. Diffusion
    C. Osmosis
    D. Brownian motion

Correct Answer: C. Osmosis

Osmosis is defined as the diffusion of water through a semipermeable membrane to a solution with a lower concentration of water. It is important to emphasize that ideal osmosis requires only the movement of pure water across the membrane without any movement of solute particles across the semipermeable membrane. Osmosis can still occur with some permeability of solute particles, but the osmotic effect becomes reduced with greater solute permeability across the semipermeable membrane.

Option A: Filtration is the process in which fluids are pushed through biological membranes by unequal processes. Filtration is a process used to separate solids from liquids or gases using a filter medium that allows the fluid to pass through but not the solid. The term “filtration” applies whether the filter is mechanical, biological, or physical. The fluid that passes through the filter is called the filtrate.
Option B: Diffusion is the random kinetic motion causing atoms and molecules to spread out evenly. There is a form of passive transport called facilitated diffusion. It occurs when molecules such as glucose or amino acids move from high concentration to low concentration facilitated by carrier proteins or pores in the membrane.
Option D: Brownian motion is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the fast-moving atoms or molecules in the gas or liquid. This transport phenomenon is named after the botanist Robert Brown.

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