Cell Membrane and Transport

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, providing protection and structural support.

Front

Define Active 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 Facilitated Diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What does Isotonic mean in terms of solutions?

Back

Isotonic solutions have equal concentrations of solutes on both sides of the membrane, resulting in no net movement of water.

Front

What happens in a Hypertonic solution?

Back

In a hypertonic solution, the concentration of solutes outside the cell is higher than inside, causing water to move out of the cell, leading to cell shrinkage.

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 move into the cell, potentially leading to cell swelling or bursting.

Front

What are vesicles?

Back

Vesicles are small compartments enclosed by a membrane that transport materials within the cell during processes like endocytosis and exocytosis.

Front

Explain the term 'Semipermeable Membrane'.

Back

A semipermeable membrane allows certain molecules or ions to pass through it by diffusion and occasionally by facilitated diffusion.

Front

What is the role of ATP in Active Transport?

Back

ATP provides the energy required for active transport to move substances against their concentration gradient.

Front

Describe Osmosis.

Back

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