2024 Review: Cells

Front

What are the three main components of cell theory?

Back

1. All living things are made of cells. 2. Cells are the basic unit of life. 3. All cells come from existing cells.

Front

What does it mean when we say that theories can adapt?

Back

Theories can change when new information is discovered, reflecting the evolving nature of scientific understanding.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a process that allows large molecules, like glucose, to pass through the cell membrane with the help of transport proteins, without using energy.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

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 the role of the nucleus in a cell?

Back

The nucleus is the control center of the cell, containing the cell's genetic material (DNA) and regulating gene expression.

Front

What is the difference between passive and active transport?

Back

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

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is a semipermeable membrane?

Back

A semipermeable membrane is a barrier that allows certain substances to pass through while blocking others, crucial for maintaining homeostasis in cells.

Front

What is the significance of cell membranes?

Back

Cell membranes protect the cell, provide structure, and regulate the movement of substances in and out of the cell.