Cell Membrane & Cell Transport

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, relying on concentration gradients.

Front

What does it mean for a membrane to be selectively permeable?

Back

A selectively permeable membrane allows some molecules to pass through while blocking others.

Front

What are the two main parts of a phospholipid?

Back

The two main parts of a phospholipid are the hydrophilic head and the hydrophobic tail.

Front

Which molecules are NOT part of the cell membrane?

Back

Nucleic Acids are NOT part of the cell membrane.

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

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane.

Front

What is the function of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the cell membrane's fluidity and structure.

Front

What is the difference between active and passive transport?

Back

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

Front

What are carbohydrates' role in the cell membrane?

Back

Carbohydrates serve as recognition sites for cell signaling and communication.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.