Active 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 in the form of ATP.

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What is the Na+/K+ Pump?

Back

The Na+/K+ Pump is a type of active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients, using ATP.

Front

Define Exocytosis.

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the plasma membrane, releasing their contents outside the cell.

Front

Define Endocytosis.

Back

Endocytosis is the process by which a cell takes in materials by engulfing them in a vesicle formed from the plasma membrane.

Front

What is Pinocytosis?

Back

Pinocytosis is a form of endocytosis where the cell engulfs liquid and small solutes, often referred to as 'cell drinking'.

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What is Phagocytosis?

Back

Phagocytosis is a type of endocytosis where the cell engulfs large particles or cells, often referred to as 'cell eating'.

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What is Facilitated Diffusion?

Back

Facilitated diffusion is a passive transport process that allows substances to cross membranes with the assistance of special proteins, without the use of energy.

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What is the difference between Active Transport 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 concentration gradient.

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What are Protein Pumps?

Back

Protein pumps are integral membrane proteins that use energy to transport ions or molecules across the cell membrane against their concentration gradient.

Front

What is the role of ATP in Active Transport?

Back

ATP provides the energy required for active transport processes, enabling the movement of substances against their concentration gradients.