Cell Transport

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a process by which molecules pass through a cell membrane via a protein channel, moving down their concentration gradient without the use of energy.

Front

What happens to a slug when salt is applied to it?

Back

The slug shrinks as water moves out of its cells due to osmosis, as the salt creates a hypertonic environment.

Front

Does facilitated diffusion require energy?

Back

No, facilitated diffusion does not require energy; it relies on the concentration gradient.

Front

What is the direction of movement for substances in a concentration gradient?

Back

Substances move from an area of high concentration to an area of low concentration.

Front

What is an isotonic solution?

Back

An isotonic solution is one where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.

Front

What is osmosis?

Back

Osmosis is the movement of water across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing the cell to lose water and shrink.

Front

What is a hypotonic solution?

Back

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

Front

What role do protein channels play in cell transport?

Back

Protein channels facilitate the movement of specific molecules across the cell membrane, allowing substances to enter or exit the cell without using energy.

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.