BIOLOGY-CELL MEMBRANE AND CELL TRANSPORT

Front

What happens to red blood cells when distilled water is introduced into the bloodstream?

Back

Red blood cells may burst due to the influx of water, a process known as hemolysis.

Front

What is active transport in the context of cell membrane transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy (ATP).

Front

What occurs during diffusion when the concentration of molecules is equal on both sides of a membrane?

Back

Molecules continue to move across the membrane in both directions, maintaining equilibrium.

Front

Define osmosis in biological terms.

Back

Osmosis is the diffusion of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What effect does a hypertonic solution have on a cell?

Back

A hypertonic solution causes water to move out of the cell, leading to cell shrinkage.

Front

What is the primary function of the cell membrane?

Back

The cell membrane regulates the movement of substances in and out of the cell, maintaining homeostasis.

Front

Explain the concept of concentration gradient.

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives diffusion and osmosis.

Front

What role do transport proteins play in cell transport?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either passively or actively.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their gradient.

Front

How does the presence of a solute affect the movement of water in osmosis?

Back

The presence of a solute creates a concentration gradient that influences the direction of water movement; water moves towards the area of higher solute concentration.