3.4 Passive Transport-Diffusion & Osmosis Flashcards
True or False
Passive transport does not require energy input from a cell.
True
Can molecules move across the cell membrane through passive transport?
Yes
What are the two types of passive transport?
- Diffusion (O2 & CO2)
2. Osmosis (H2O)
True or False
Molecules move across the cell membrane through passive transport.
True
True or False
Molecules diffuse down a concentration gradient, from high consecration to low concentration.
True
What is Osmosis?
The diffusion of water molecules across a semipermeable membrane.
The diffusion of water molecules across a semipermeable membrane is called what?
Osmosis
What are the 3 types of Solutions?
- Isotonic
- HypErtonic
- HypOtonic
Describe Isotonic
Has the same concentration of solutes as the cell. Equal amounts of water enter and exit the cell.
What has the same concentration of solutes as the cell. Equal amounts of water enter and exit the cell is known as?
Isotonic
Describe HypErtonic
Has more solutes than a cell. More water exits the cell causing it to shrivel or even die.
What has more solutes than a cell, allowing more water to exit the cell causing it to shrivel or even die?
HypErtonic
Describe HypOtonic
Has less solutes than a cell. More water enters the cell causing it to expand or even burst. Also known as “swelling”
What has less solutes than a cell, allowing more water to enter the cell causing it to expand or even burst?
HypOtonic
Some molecules can only diffuse through what?
Transport Protiens
