Tonicity Practice

Front

What is tonicity?

Back

Tonicity refers to the ability of a solution to affect the volume and pressure of a cell by osmosis. It describes how the concentration of solutes in a solution compares to that inside a cell.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst due to increased internal pressure.

Front

What is equilibrium in the context of cell biology?

Back

Equilibrium is the state where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.

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 osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is facilitated diffusion?

Back

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

Front

What is the sodium-potassium pump?

Back

The sodium-potassium pump is an active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell, crucial for maintaining cellular function.

Front

What is receptor-mediated endocytosis?

Back

Receptor-mediated endocytosis is a process by which cells internalize molecules by the inward budding of the plasma membrane, which is triggered by the binding of those molecules to specific receptors.

Front

What is pinocytosis?

Back

Pinocytosis is a form of endocytosis where the cell engulfs liquid from the surrounding environment, allowing it to take in small particles and nutrients.