MW Practice Cellular Transport BIO CP

Front

What is cellular transport?

Back

Cellular transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as diffusion, osmosis, and active transport.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink or crenate.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules from high to low 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 without the use of energy.

Front

What role do phospholipids play in the cell membrane?

Back

Phospholipids form the bilayer structure of the cell membrane, providing a barrier that separates the interior of the cell from the external environment.

Front

What is the function of transport proteins?

Back

Transport proteins assist in the movement of substances across the cell membrane, either by facilitating passive transport or by actively transporting molecules using energy.

Front

What is the significance of the sodium-potassium pump?

Back

The sodium-potassium pump is an example of active transport that maintains the electrochemical gradient in cells by pumping sodium out and potassium into the cell.