Cell Transport regents questions

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy in the form of ATP.

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What happens to a cell in distilled water?

Back

When a cell is placed in distilled water, water enters the cell by osmosis, potentially causing it to swell and burst due to the higher concentration of solutes inside the cell.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What role does the cell membrane play in transport?

Back

The cell membrane regulates the flow of substances into and out of the cell, maintaining homeostasis.

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 the significance of protein molecules in cells?

Back

Protein molecules perform various functions, including acting as enzymes, providing structural support, and facilitating transport across the cell membrane.

Front

What is the effect of salt water on cells?

Back

When cells are placed in salt water, water moves out of the cell by osmosis, causing the cell to shrink.

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.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, thus controlling the internal environment of the cell.