Membranes and Cell Transport

Front

What is Exocytosis?

Back

Exocytosis is a form of active transport where cells expel materials by vesicles fusing with the plasma membrane, releasing their contents outside the cell.

Front

What is Osmosis?

Back

Osmosis is the process by which water molecules diffuse across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What does Hydrophilic mean?

Back

Hydrophilic means 'water-loving', referring to substances that can interact with or dissolve in water.

Front

What does Hydrophobic mean?

Back

Hydrophobic means 'water-fearing', referring to substances that do not interact well with water and tend to be nonpolar.

Front

What is the function of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, providing protection and structural support.

Front

What is a feedback system in biological terms?

Back

A feedback system is a process that uses the conditions of one component to regulate the function of another, helping to maintain homeostasis.

Front

What is the role of aldosterone in the body?

Back

Aldosterone helps regulate sodium and potassium levels in the body, which in turn helps control blood pressure and fluid balance.

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.

Front

What is Passive Transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, typically along the concentration gradient.

Front

What is the difference between Endocytosis and Exocytosis?

Back

Endocytosis is the process of taking materials into the cell, while exocytosis is the process of expelling materials from the cell.