TRANSPORT ACROSS MEMBRANES

Question 0

HYPOTONIC SOLUTION

Answer 0

Solution has a higher Ψ compared to the cell

Question 1

HYPERTONIC SOLUTION

Answer 1

Solution has a lower Ψ to the cell

Question 2

ISOTONIC SOLUTION

Answer 2

Same Ψ in the cell and solution

Question 3

INCIPIENT PLASMOLYSIS

Answer 3

Plasmolysis - When the cell is in a low Ψ solution and water is lost by osmosis. Membrane and cytoplasm are pulled away from the cell wall
Incipient - When 50% of cells are plasmolysed

Question 4

LYSED HAEMOLYSIS

Answer 4

Too much water is being moved into the cell because the cell has a lower Ψ than the outside, so the cell will burst

Question 5

CRENATED

Answer 5

The cell has a higher Ψ than the outside so water will move out of the cell, causing the cell to shrivel up.

Question 6

TURGID

Answer 6

The cell has a lower Ψ than the solution so water will move into the cell and make it turgid

Question 7

DIFFUSION

Answer 7

The passive random net movement of small, non-polar molecules from an area of high concentration to an area of lower concentration.

Question 8

FACILITATED DIFFUSION

Answer 8

The passive random net movement of molecules from an area of higher concentration to an area of lower concentration

Question 9

F.D. CHANNEL PROTEINS

Answer 9

An intrinsic protein that stretches across the membrane creating an hydrophilic channel through which polar substances and charged ions can pass through

Question 10

F.D. CARRIER PROTEINS

Answer 10

Intrinsic proteins that work by binding to larger molecules and changing shape to allow their passage

Question 11

OSMOSIS

Answer 11

The passive random net movement of water molecules from an area of high Ψ to an area of lower Ψ through a partially permeable membrane