Biology- How Substances Enter And Leave Cells

Question 1

Define the cell membrane

Answer 1

Semi-permeable any substance entering or leaving must pass through hear

Question 2

Define the cellulose cell wall

Answer 2

The plant cell wall is composed of cellulose. Cellulose is a structural carbohydrate and is considered a complex sugar because it is used in both protection and structure

Question 3

Define diffusion

Answer 3

The tendency of molecules to move from an area of lower concentration
E.g. Animal- exchange of carbon dioxide and oxygen between the alveoli in the lungs and blood
E.g. Plants- carbon dioxide enters stomata and oxygen leaves

Question 4

Define osmosis

Answer 4

Movement of water from regions of high water concentration through a semi permeable membrane.

Question 5

Define and solute solution

Answer 5

Substances being dissolved in a liquid

Question 6

Define solvent solution

Answer 6

Substance doing the dissolving

Question 7

What does a hypertonic solution do to a cell?

Answer 7

A hypertonic solution causes a cell to shrink because of osmosis (water leaves the cell)

Question 8

What does a hypotonic solution do to a cell

Answer 8

A hypotonic solution causes a cell to swell because of osmosis (water entered the cell)

Question 9

What does an isotonic solution do to a cell

Answer 9

Isotonic solution doesn’t effect a cell