Homework Review Flashcard 1: Cell Membrane and Transport

Front

What is 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 the primary function of the cell membrane?

Back

The cell membrane regulates what enters and leaves the cell, maintaining homeostasis.

Front

What is ATP?

Back

ATP (adenosine triphosphate) is the energy molecule that powers various cellular processes, including active transport.

Front

What are the two main forms of passive transport?

Back

The two main forms of passive transport are diffusion and osmosis.

Front

What does hydrophilic mean?

Back

Hydrophilic means 'water loving', referring to substances that can interact with water.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration without the use of energy.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is the role of the cell membrane in homeostasis?

Back

The cell membrane helps maintain homeostasis by controlling the movement of substances in and out of the cell.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy (ATP) to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from their external environment, bringing them into the cell.