Biology Chapter 4 - Transport

Front

What happens to a cell placed in fresh water?

Back

The cell will swell due to osmosis, as water moves into the cell.

Front

What happens to a cell placed in ocean water?

Back

The cell will lose water due to osmosis, as water moves out of the cell.

Front

What is active transport?

Back

Active transport is the movement of substances from low concentration to high concentration, requiring energy.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically from high to low concentration.

Front

What is osmosis?

Back

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

Front

What is diffusion?

Back

Diffusion is the movement of particles from an area of high concentration to an area of low concentration.

Front

What is a negative feedback loop in transport?

Back

A negative feedback loop helps maintain homeostasis by regulating the transport of substances in response to changes in the environment.

Front

What is the role of contractile vacuoles?

Back

Contractile vacuoles help regulate water balance in cells by expelling excess water.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not.

Front

What is an example of active transport?

Back

An example of active transport is the sodium-potassium pump, which moves sodium out of and potassium into the cell.