Chapter #8 Test: Cell Organelles and Transport

Front

What is osmosis?

Back

The movement of water molecules from a region of lower solute concentration to a region of higher solute concentration through a semi-permeable membrane.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy (ATP) to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What is a semi-permeable membrane?

Back

A membrane that allows only certain molecules to pass through while blocking others.

Front

What are prokaryotic cells?

Back

Cells that do not have a nucleus or other membrane-bound organelles, such as bacteria.

Front

What are eukaryotic cells?

Back

Cells that have a nucleus and other membrane-bound organelles, such as plant and animal cells.

Front

What is the cell theory?

Back

A fundamental concept in biology that states: 1) All living things are composed of cells, 2) Cells are the basic unit of life, and 3) All cells come from pre-existing cells.

Front

What role do microscopes play in cell biology?

Back

Microscopes allow scientists to observe cells and their structures, leading to the development of the cell theory.

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is facilitated diffusion?

Back

A type of passive transport that uses transport proteins to help move substances across a cell membrane.

Front

What is ATP?

Back

Adenosine triphosphate, the energy currency of the cell, used in active transport and other cellular processes.