Transport Across Cell Membranes Flashcards
1
Q
Osmosis is …
A
The movement of water molecules down a concentration gradient from a high to low water concentration through a selectively permeable membrane
2
Q
Does osmosis require energy?
A
No as it goes from low to high
3
Q
Diffusion is …
A
Movement of molecules and ions down a concentration gradient from a high to low concentration
4
Q
Does diffusion require energy?
A
No as it goes from low to high
5
Q
Does active transport require energy?
A
Yes as it goes from high to low
6
Q
What molecules are loved by diffusion
A
Glucose and amino acids
Oxygen
Carbon dioxide
Waste products of respiration
7
Q
What is the cell membrane made of?
A
Proteins and phospholipids
8
Q
Name a factor that could cause a difference in diffusion rates
A
The size of molecule
