Cell Transport

Front

What is equilibrium in the context of molecular movement?

Back

Equilibrium refers to a state where molecular movement continues, but there is no overall change in concentration.

Front

What is a hypertonic solution?

Back

A hypertonic solution is one that has a higher concentration of solutes compared to the inside of a cell, causing water to move out of the cell.

Front

Define diffusion.

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

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

Front

What does a selectively permeable membrane do?

Back

A selectively permeable membrane allows certain substances to enter and leave while preventing others.

Front

What is passive transport?

Back

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

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP).

Front

Explain the concept of homeostasis.

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is the difference between isotonic, hypertonic, and hypotonic solutions?

Back

Isotonic solutions have equal concentrations of solutes inside and outside the cell; hypertonic solutions have a higher concentration outside, and hypotonic solutions have a lower concentration outside.

Front

What role do carrier proteins play in cell transport?

Back

Carrier proteins facilitate the transport of specific substances across a cell membrane, often in active transport.