Cell Transport/Homeostasis

Front

What is passive transport?

Back

The movement of particles from an area of higher concentration to an area of lower concentration without the use of energy.

Front

What is dynamic equilibrium?

Back

A state reached when diffusion has occurred and the concentrations are the same on both sides of a membrane.

Front

What happens to your breathing rate when oxygen levels rise?

Back

Your breathing rate returns to baseline.

Front

What does it mean if a cell shrinks in size?

Back

The cell was placed in a hypertonic solution.

Front

What is a selectively permeable membrane?

Back

A cell membrane that allows some substances to pass freely while restricting others.

Front

What is the role of the phospholipid bilayer in cell membranes?

Back

It forms the basic structure of the cell membrane, providing a barrier to most water-soluble substances.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

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

Back

Isotonic: equal concentration; Hypertonic: higher concentration outside the cell, causing it to shrink; Hypotonic: lower concentration outside the cell, causing it to swell.

Front

What is active transport?

Back

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

Front

What is facilitated diffusion?

Back

A type of passive transport that uses transport proteins to move molecules across the membrane.