Biology 7.4 Cellular Transport

Front

What is cellular transport?

Back

Cellular transport refers to the movement of substances across the cell membrane, which is essential for maintaining homeostasis within the cell.

Front

True or False: Cellular transport is designed to maintain homeostasis.

Back

True

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in concentration of particles across a space, which drives the movement of substances from areas of high concentration to areas of low concentration.

Front

What is diffusion?

Back

Diffusion is the process by which particles spread from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to move ions and small molecules across the plasma membrane.

Front

What is an isotonic solution?

Back

An isotonic solution has the same concentration of water and solutes as the cell, resulting in no net movement of water.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to enter the cell and potentially leading to swelling.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to leave the cell and potentially leading to shrinkage.

Front

What role do transport proteins play in cellular transport?

Back

Transport proteins assist in the movement of substances across the cell membrane, especially for molecules that cannot easily pass through the lipid bilayer.