Lecture 7

Question 1

What is ATP?

Answer 1

Adenosine triphosphate, which gives energy that is usable within a cell

Question 2

What are the two major catabolic reactions animals will go through to make ATP from food?

Answer 2

• Anaerobic pathways - without oxygen
• Aerobic pathways - with oxygen

Question 3

How does aerobic metabolism/ pathway work?

Answer 3

• 4 reactions that occur

1. Glycolysis - where enzyme breaks down glucose, causing 2 NAD to be reduced to 2 NADH2.
2. The Krebs cycle, this is where pyruvic acid is oxidized causing 4 NAD to be reduced into 4 NADH2 and 1 FAD is reduced to FADH2, where ATP is produced.

3/4. Electron transport chain and oxidative phosphorylation - occurs in inner mitochondria where all of the NADH2 and FADH2 produced from 1 and 2 are oxidized into NAD and FAD and ATP is extracted

Question 4

How much ATP is produced from one unit of glucose in steps 3 and 4?

Answer 4

25

Question 5

How does anaerobic pathways work?

Answer 5

Glucose is catabolized into lactic acid, producing 2 ATPs, lactate dehydrogenase allows for the recycling of NADH2 to NAD

Question 6

What shape does swimming show in terms of speed and O2 consumption?

Answer 6

J shape

Question 6

What shape does flying show in terms of speed and O2 consumption?

Answer 6

U-shape

Question 6

What shape does running/walking show in terms of speed and O2 consumption?

Answer 6

linear line