Cell membrane transport

Front

Diffusion is a form of __________ transport.

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy.

Front

The cellular process in which materials are moved across a membrane from an area of low concentration to an area of high concentration is called __________.

Back

Active Transport is the process that requires energy to move substances against their concentration gradient.

Front

The general name for movement of substances across cell membranes without need of energy input is __________.

Back

Passive transport refers to the movement of substances across a membrane without the use of energy.

Front

What is the hydrophobic region of the cell membrane?

Back

The hydrophobic region of the cell membrane is composed of fatty acid tails of phospholipids, which repel water.

Front

What is another term for "selectively permeable"?

Back

Semipermeable is a term used to describe membranes that allow certain substances to pass while blocking others.

Front

What is osmosis?

Back

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

Front

What is the role of transport proteins in the cell membrane?

Back

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

Front

Define active transport.

Back

Active transport is the process of moving molecules against their concentration gradient, requiring energy (ATP).

Front

What is facilitated diffusion?

Back

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

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.