Cell Transport 2

Front

What is the primary function of the cell membrane in maintaining homeostasis?

Back

The cell membrane controls the movement of substances in and out of the cell.

Front

Define osmosis in the context of cell transport.

Back

Osmosis is the movement of water from a high concentration to a low concentration.

Front

What is exocytosis and when does it occur?

Back

Exocytosis is a type of active transport that uses a vesicle to allow a large molecule to exit the cell.

Front

How do facilitated diffusion and protein pumps differ?

Back

Facilitated diffusion does not require energy, while protein pumps do require energy.

Front

What happens to a cell when water moves out of it?

Back

The cell will shrink.

Front

What is the role of the cell membrane in selective permeability?

Back

The cell membrane selectively allows certain substances to pass while blocking others, maintaining the internal environment of the cell.

Front

Explain the concept of concentration gradient in cell transport.

Back

A concentration gradient is the difference in concentration of a substance across a space, which drives the movement of substances from high to low concentration.

Front

What is the difference between passive and active transport?

Back

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

Front

What is the significance of protein channels in facilitated diffusion?

Back

Protein channels facilitate the movement of specific molecules across the cell membrane without the use of energy.

Front

Describe the process of endocytosis.

Back

Endocytosis is the process by which cells engulf substances from the outside environment, bringing them into the cell.