Cell Transport

Front

What is the definition of active transport in cell transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy (ATP).

Front

What is the primary difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, typically moving from an area of high concentration to an area of low concentration.

Front

What role do protein channels play in passive transport?

Back

Protein channels facilitate the diffusion of specific molecules across the cell membrane, allowing them to move from areas of high concentration to areas of low concentration.

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

In a hypertonic solution, what happens to a cell?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink or crenate due to the higher concentration of solutes outside the cell.

Front

In a hypotonic solution, what happens to a cell?

Back

In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst due to the lower concentration of solutes outside the cell.

Front

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

Back

The concentration gradient is the difference in concentration of a substance across a space, and it drives the movement of molecules during both passive and active transport.

Front

What is the function of the cell membrane in transport processes?

Back

The cell membrane regulates the movement of substances in and out of the cell, maintaining homeostasis and allowing for selective permeability.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move molecules across the cell membrane without the use of energy.