The chemical level of organisation

Question 1

Matter-

Answer 1

anything that takes up space eg materials

Question 2

Elements-

Answer 2

unique substances that make up matter

Question 3

Cation

Answer 3

Positively charged ion

Question 4

Anion

Answer 4

Negatively charged ion

Question 5

Metabolism

Answer 5

sum of all the chemical reactions in the body

Question 6

Types of reactions

Answer 6

-anabolic- synthesis reaction
-catabolic- decomposition/ breakdown
-exchange reaction: AB + CD-> AC + BD
-reversible reactions

Question 7

Mixture

Answer 7

combination of elements not bound by chemical bonds

Question 8

What percentage of our bodies is water?

Answer 8

65-80% depending on age - babies are very “wet”

Question 9

Suspension

Answer 9

suspended material may mix with the fluid but will eventually separate eg blood

Question 10

Colloid

Answer 10

differs from solution as molecules don’t dissolve instead are evenly distributed in the suspending material eg proteins in the blood plasma

Question 11

Example of a solution in the body

Answer 11

blood plasma as it has dissolved compounds