Cell Transport

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of moving molecules across a cell membrane through channel proteins without the use of energy.

Front

What role do channel proteins play in cell transport?

Back

Channel proteins assist in the facilitated diffusion of specific molecules across the cell membrane.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels large quantities of toxins and waste by enclosing them in vesicles that fuse with the cell membrane.

Front

What happens to a cell when it is placed in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing the cell to shrink.

Front

What is osmosis?

Back

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

Front

Define hypotonic solution.

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, leading to water moving into the cell.

Front

What is the effect of a hypotonic solution on a cell?

Back

In a hypotonic solution, the cell swells as water enters due to osmosis.

Front

What is the difference between active and passive transport?

Back

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

Front

What is the function of a protein pump?

Back

A protein pump is a type of transport protein that moves ions or molecules across a membrane against their concentration gradient using energy.

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.