Chapter 1: Section 4 Flashcards
0
Q
Wat r 2 types of transports
A
- Passive
2. Active
1
Q
Selective permeability
A
The cell membrane allows some substances through, but keeps others out
2
Q
This does not use energy
A
Passive transport
3
Q
This uses energy
A
Active transport
4
Q
What does passive transport include
A
- diffusion
* osmosis
5
Q
What does active transport include
A
- transport proteins
* engulfing
6
Q
What is diffusion
A
The process by which molecules move from an area of higher concentration to an area of lower concentration
7
Q
Wat causes diffusion
A
- molecules move and are always bumping into each other
- The more concentrated the molecules are the more they bumped
- overtime they spread out
8
Q
Wat is osmosis
A
The type of diffusion involving water
9
Q
Y is osmosis important
A
• cells cannot function without water
10
Q
transport proteins
A
- pick up molecules outside the cell and carry them in
- can also carry molecules out
- requires energy
11
Q
Engulfing
A
- a cell uses the cell membrane to surround a particle
* a vacuole is formed
