Biology DMA #2

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 (ATP).

Front

Does active transport require energy?

Back

Yes, active transport requires energy to move substances against their concentration gradient.

Front

What is the structure of the cell membrane?

Back

The cell membrane is a phospholipid bilayer that is semipermeable, controlling what enters and leaves the cell.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing the cell to lose water and shrink.

Front

What happens to an animal cell in a hypertonic solution?

Back

An animal cell placed in a hypertonic solution will shrink due to the loss of water.

Front

What is the difference between dependent and independent variables?

Back

The dependent variable is the effect that responds to changes in the independent variable, which is the cause.

Front

What is homeostasis?

Back

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

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, providing protection and support.

Front

What does semipermeable mean?

Back

Semipermeable means that a membrane allows certain substances to pass through while blocking others.

Front

What is the role of phospholipids in the cell membrane?

Back

Phospholipids form the basic structure of the cell membrane, creating a barrier that separates the inside of the cell from the outside.