Unit 3 Homeostasis & Cell Transport Review

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy. It occurs along the concentration gradient.

Front

Name three types of passive transport.

Back

1. Diffusion 2. Osmosis 3. Facilitated diffusion

Front

What is osmosis?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane.

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against the concentration gradient, requiring energy (ATP).

Front

What is a hypertonic solution?

Back

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

Front

What happens to an animal cell in a hypertonic solution?

Back

The animal cell will lose water and may shrivel due to the higher concentration of solutes outside the cell.

Front

What is a hypotonic solution?

Back

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

Front

What happens to an animal cell in a hypotonic solution?

Back

The animal cell will gain water and may burst (lyse) due to the lower concentration of solutes outside the cell.

Front

What is isotonic solution?

Back

An isotonic solution has an equal concentration of solutes inside and outside the cell, resulting in no net movement of water.