Plasma Membrane and Cellular Transport

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against their concentration gradient, requiring energy (ATP).

Front

What does selectively permeable mean in the context of the cell membrane?

Back

Selectively permeable means that the cell membrane allows certain substances to enter or leave the cell while blocking others.

Front

What are the main components of the cell membrane?

Back

The cell membrane is primarily composed of lipids, proteins, and carbohydrates.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules from an area of high concentration to an area of low concentration through a selectively permeable membrane.

Front

Which component is NOT part of the cell membrane?

Back

Nucleic Acids are not part of the cell membrane.

Front

What is the primary function of the plasma membrane?

Back

The primary function of the plasma membrane is to protect the cell and regulate what enters and exits.

Front

What role do proteins play in the cell membrane?

Back

Proteins in the cell membrane assist in transport, act as receptors, and provide structural support.

Front

Define diffusion in the context of cellular transport.

Back

Diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration.

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 gradient.

Front

What is the significance of lipid bilayer in the plasma membrane?

Back

The lipid bilayer forms the fundamental structure of the plasma membrane, providing a barrier that separates the inside of the cell from the outside environment.