Cell Transport

Front

What happens to an animal cell when it is placed in a hypertonic solution?

Back

The cell will shrink.

Front

What type of diffusion occurs when molecules move from an area of higher concentration to an area of lower concentration without the use of energy?

Back

Simple Diffusion.

Front

What is a selectively permeable membrane?

Back

A membrane that allows some substances to pass while blocking others.

Front

What characterizes a hypertonic solution in relation to a cell?

Back

It has a higher concentration of solute compared to the inside of the cell.

Front

What will happen to a cell containing 25% NaCl when placed in a 5% NaCl solution?

Back

The cell will swell because the solution is hypotonic.

Front

Define osmosis.

Back

The movement of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the difference between isotonic, hypertonic, and hypotonic solutions?

Back

Isotonic solutions have equal solute concentrations, hypertonic solutions have a higher solute concentration than the cell, and hypotonic solutions have a lower solute concentration than the cell.

Front

How does a cell maintain homeostasis in relation to its environment?

Back

By regulating the movement of substances in and out of the cell through its membrane.

Front

What role do transport proteins play in cell transport?

Back

They facilitate the movement of substances across the cell membrane that cannot pass freely.

Front

What is facilitated diffusion?

Back

A type of passive transport that uses transport proteins to move molecules across the membrane down their concentration gradient.