Bio Test: Cell Membrane and Transport

Front

What is the function of the plasma membrane?

Back

To regulate what enters and leaves the cell.

Front

What is a phospholipid composed of?

Back

A phosphate and glycerol head and 2 fatty acid chain tails.

Front

What type of transport requires energy to move solutes against the concentration gradient?

Back

Active Transport.

Front

What is osmosis?

Back

A form of Passive Transport involving the movement of water across a semipermeable membrane.

Front

What type of cellular transport requires no energy?

Back

Passive Transport.

Front

Define Passive Transport.

Back

The movement of substances across a cell membrane without the use of energy.

Front

Define Active Transport.

Back

The movement of substances against their concentration gradient, requiring energy.

Front

What role do protein pumps play in cellular transport?

Back

They facilitate Active Transport by moving ions or molecules across the membrane.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of solutes, while osmosis specifically refers to the movement of water.

Front

What is a concentration gradient?

Back

A difference in the concentration of a substance across a space.