Biology 2 - Substances enter&leave.. Flashcards
1
Q
Explain how diffusion works
A
Molecules diffuse from high concentrations to low.
No energy required
2
Q
Which factors affect the rate of diffusion?
A
Concentration (greater the gradient the quicker)
Temperature (increases- more kinetic- faster)
Pressure (higher faster)
3
Q
What’s osmosis?
A
Diffusion of water from high concentration to low concentration through a ppm
4
Q
What happens in during osmosis when the concentrations become equal?
A
No net movement
Equilibrium reached
5
Q
What’s active transport?
A
Energy required to actively transport material into a cell
Happens when concentration is lower outside the cell
6
Q
Give an example of active transport
A
Glucose from the small intestine into the blood
