Cell transport

Front

What is active transport?

Back

Active transport is the process by which molecules move against the concentration gradient, from an area of lower concentration to an area of higher concentration, requiring energy.

Front

What does it mean for a cell to be placed in a hypertonic solution?

Back

When a cell is placed in a hypertonic solution, it loses water and shrinks in size due to the higher concentration of solutes outside the cell compared to the inside.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves molecules down the concentration gradient, while active transport requires energy to move molecules against the concentration gradient.

Front

Define endocytosis.

Back

Endocytosis is a type of active transport that involves the movement of particles into a cell by enclosing them in a vesicle made from the plasma membrane.

Front

What is a hypotonic solution?

Back

A hypotonic solution is one where the concentration of solutes is lower outside the cell than inside, causing the cell to swell as water enters.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What happens to a cell in an isotonic solution?

Back

In an isotonic solution, the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water and the cell maintaining its shape.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move molecules across the cell membrane down their concentration gradient.

Front

What role do transport proteins play in cell transport?

Back

Transport proteins assist in the movement of substances across the cell membrane, either by facilitating passive transport or by actively transporting molecules against their concentration gradient.

Front

What is the significance of the concentration gradient in cell transport?

Back

The concentration gradient is crucial in determining the direction of movement for molecules; substances tend to move from areas of high concentration to areas of low concentration in passive transport.