Membrane Transport

Front

What is membrane transport?

Back

Membrane transport refers to the mechanisms by which substances move across the cell membrane, including passive and active transport.

Front

Define passive transport.

Back

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

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 is the role of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, provides protection, and facilitates communication with other cells.

Front

What is simple diffusion?

Back

Simple diffusion is the process by which nonpolar and uncharged substances move directly through the lipid bilayer of the cell membrane.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which polar or charged substances move across the cell membrane with the help of transport proteins.

Front

What is osmosis?

Back

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

Front

What is a glycoprotein?

Back

A glycoprotein is a protein that has carbohydrate chains attached to it, playing a key role in cell recognition and signaling.

Front

What is the sodium-potassium pump?

Back

The sodium-potassium pump is a specialized protein that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Front

What are integral proteins?

Back

Integral proteins are proteins that span the entire membrane and are involved in transporting substances across the membrane.