Cell Membranes and Transport

Front

What is ATP and its role in cellular transport?

Back

ATP (Adenosine Triphosphate) is a form of energy used in Active Transport, which requires energy to move substances against their concentration gradient.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, following the concentration gradient.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane, often through aquaporins, and is classified as passive transport.

Front

What happens to plant cells in hypotonic solutions?

Back

Plant cells maintain homeostasis in hypotonic solutions due to their cell wall, which prevents excessive swelling and bursting.

Front

What are the two parts of a phospholipid?

Back

A phospholipid has a Hydrophilic Head and a Hydrophobic Tail.

Front

What is the role of cholesterol in the cell membrane?

Back

Cholesterol helps maintain the fluidity of the membrane, ensuring it remains flexible and functional.

Front

Define selective permeability in cell membranes.

Back

Selective permeability is the property of cell membranes that allows certain molecules to pass through while blocking others.

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 and moves substances along their gradient.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules during diffusion.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane.