Biology #2 Flashcards
1
Q
The cell membrane is __________ ___________.
A
Selectively permeable. It lets some substances pass through but not others.
2
Q
What is concentration?
A
The amount of a substance in a certain place
3
Q
What happens during diffusion?
A
Diffusion is when particles move from a place of high concentration to low concentration. Ex: Diffusion moves oxygen and waste in & out of the cell
4
Q
What is osmosis?
A
A special type of diffusion - the diffusion of water. Water particles move from a place of high concentration of water to low concentration of water.
5
Q
What is the body system?
A
cell - tissue - organ - organ system - organism
6
Q
What is tissue?
A
cels that have the same structure and play the same role in the body.
7
Q
What is an organ?
A
Tissues of deferent kinds that work together.
