Cell Transport

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

Front

Name three types of passive transport.

Back

1. Simple diffusion 2. Facilitated diffusion 3. Osmosis

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

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

Back

Hypotonic solutions have a lower concentration of solute compared to the cell, hypertonic solutions have a higher concentration of solute, and isotonic solutions have equal concentrations.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a membrane.

Front

What is exocytosis?

Back

Exocytosis is the process of expelling materials from a cell by vesicles fusing with the plasma membrane.

Front

What is simple diffusion?

Back

Simple diffusion is the movement of small or nonpolar molecules across the cell membrane without the assistance of proteins.

Front

What role do transport proteins play in facilitated diffusion?

Back

Transport proteins help move larger or polar molecules across the cell membrane along their concentration gradient.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules.

Front

How does temperature affect the rate of diffusion?

Back

Higher temperatures increase the kinetic energy of molecules, leading to a faster rate of diffusion.