LEC 4

Question 1

What are chemical reactions?

Answer 1

The formation and interactions of chemical bonds

Question 2

what is chemical Notation?

Answer 2

Symbols and abbreviations explaining chemical reaction( reactant and product)

Question 3

what is energy?

Answer 3

The capacity to do work

Question 4

what are the 2 types of energy?

Answer 4

1. Potential energy
   2.kinetic energy

Question 5

what is potential energy?

Answer 5

Stored energy

Question 6

what is kinetic energy?

Answer 6

Energy in motion (active energy)

Question 7

List the forms of energy in the human body?

Answer 7

1. Chemical energy
2. Electrical energy
3. Mechanical energy

Question 8

Chemical energy?

Answer 8

Drive cellular processes
Eg: found in food, ATP

Question 9

Electrical energy?

Answer 9

Produced in some cells
Eg: heart or nervous tissues

Question 10

mechanical energy?

Answer 10

Energy transferred from one object to another
Eg: contracting muscles

Question 11

Name the 3 types of chemical reactions?

Answer 11

1. Catabolic reactions
2. Anabolic reactions
3. Exchange reactions

Question 12

what is catabolic reactions?

Answer 12

The breakdown of atoms
Eg: carbohydrates&raquo_space; Glucose

Question 13

what is anabolic reactions?

Answer 13

The build up of atoms
Eg: glucose + glucose = Glycogen

Question 14

what is exchange reactions?

Answer 14

Reactants switch places
Eg: AB+CD = AD+BC

Question 15

what are enzymes?

Answer 15

-The activation energy (Ea)
-Enzymes speeds up reaction time

Note:
(Enzymes are proteins)

Note: Activation energy brings the reactants to the transition states - in order to form products

Note: Enzymes helps in the process of chemical bonding. Reacting atoms create a product

Question 16

Factors that affect rate of reactions!

Answer 16

-Temperature increases atoms kinetic energy

-Greater concentration - increase reaction rate

Question 17

lists 2 outcomes of Enzymes deficiencies?

Answer 17

1. Build up around nerve cells - Death
2. Compromised immune system