Cell Transport & Energy

Front

What is endocytosis?

Back

Endocytosis is a type of cell transport where cells engulf substances from their external environment, bringing them into the cell.

Front

Define homeostasis in the context of cellular function.

Back

Homeostasis is how the cell regulates its internal environment to maintain stable, constant conditions necessary for survival.

Front

What is the primary function of chloroplasts in plant cells?

Back

Chloroplasts are responsible for photosynthesis, the process by which plants convert light energy into chemical energy.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two locations, which drives the movement of substances across membranes.

Front

Which transport mechanism is NOT considered active transport?

Back

Facilitated diffusion is not considered active transport; it relies on concentration gradients and does not require energy.

Front

What is the role of the plasma membrane in cell transport?

Back

The plasma membrane regulates the movement of substances in and out of the cell, maintaining homeostasis.

Front

Explain the difference between passive and active transport.

Back

Passive transport does not require energy and moves substances along their concentration gradient, while active transport requires energy to move substances against their gradient.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane, moving from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the significance of the sodium-potassium pump?

Back

The sodium-potassium pump is an active transport mechanism that maintains the electrochemical gradient by moving sodium out of the cell and potassium into the cell.

Front

Describe facilitated diffusion.

Back

Facilitated diffusion is a passive transport process that uses specific transport proteins to help move substances across the plasma membrane.