CELL TRANSPORT PMT

Question 1

what is simple diffusion?

Answer 1

The net movement of molecules from an area of high concentration to an area of low concentration down a concentration gradient

Question 2

which molecules enter and leave the cell via simple diffusion through the cell membrane?

Answer 2

Small molecules e.g. Water oxygen glucose amino acids.

Question 3

What factors affect the rate of diffusion?

Answer 3

-temperature
-Concentration gradient
-Surface area of cell membrane

Question 4

Define osmosis

Answer 4

The net movement of water molecules from an area of high water concentration to an area of low water concentration through a partially permeable membrane.

Question 5

what is active transport?

Answer 5

The movement of molecules across a cell membrane through an area of low concentration to an area of high concentration against the concentration gradient, using energy

Question 6

What does hypertonic mean?

Answer 6

When the concentration of solute in a solution outside the cell is higher than the internal concentration

Question 7

What does hypotonic mean?

Answer 7

When the concentration of solute in a solution outside the cell is lower than the internal concentration

Question 8

What does isotonic mean?

Answer 8

When the concentration of solute in a solution outside the cell is the same than the internal concentration