Lesson 4: Energy And Cellular Metabolism

Question 1

Define what the first law of thermodynamics is

Answer 1

Also known as the law of conservation of energy, it defines that the total amount of energy in the universe is constant

Question 2

Define Respiration

Answer 2

It can be defined in two ways, Breathing and human metabolism (Breaking down things with oxygen)

Question 3

Define the second law of thermodynamics

Answer 3

It can be defined as energy transfer or transformation, the total entropy (Or disorder) of an isolated system increases over time. Energy tends to spread out and become less organized meaning that systems will decay as time goes on.

Question 4

What are the three types of work and two types of energy

Answer 4

Kinetic and Potential Energy
Chemical, Transport and Mechanical work

Question 5

Define Catabolism and Anabolism

Answer 5

Catabolism —> Energy releasing breakdown
Anabolism —-> Energy-utilizing synthesis

Question 6

What do enzymes do

Answer 6

Enzymes accelerate the conversion of the substrate into product and are not used up in the reaction