10BD 7-3: Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through passive or active mechanisms.

Front

Define passive transport.

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What role do protein channels play in cell transport?

Back

Protein channels assist in maintaining homeostasis by allowing specific materials to enter and exit the cell.

Front

What happens to a cell in an isotonic solution?

Back

In an isotonic solution, a cell remains the same size because water moves in and out at equal rates.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

Define hypotonic solution.

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing the cell to swell.

Front

Define hypertonic solution.

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing the cell to shrink.

Front

What is exocytosis?

Back

Exocytosis is the process by which vesicles fuse with the plasma membrane to release their contents outside the cell.

Front

What is endocytosis?

Back

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