aerobic system #5

Question 1

• under aerobic (low intensity) exercise conditions, what is the major production of glycolysis?
• how about anaerobic? (high intensity)

Answer 1

• pyruvate.
• lactate

Question 2

name the four key regulatory enzymes associated with anaerobic glycolysis?

Answer 2

• hexokinase
• Phosphofructokinase (PFK)
• phosphorylase
• LDH

Question 3

large amount of energy is produced by biochemical pathways that have complete breakdown of what?

Answer 3

• glucose/glycogen
• fats
• amino acids

Question 4

what are the major components of aerobic pathway?

Answer 4

• aerobic glycolysis
• krebs citric acid cycle
• beta (fat) oxidation
• ETC

Question 5

what happens during aerobic glycolysis?

Answer 5

• during aerobic glycolysis there is no by product produced.
• the end product is pyruvate which gets broken into A. CoA, which is use for the Krebs cycle.

Question 6

what is an enzyme that affects NADH?
how does it affect NADH?

Answer 6

pyruvate dehydrogenase.
- NADH is affected by PDH taking the hydrogen off and NAD+ is formed.

Question 7

what happens with the formation of acetyl CoA?

Answer 7

• O2 is not directly used, but much be aerobic.
• occurs in the mitochondrial matrix
• No ATP produced.
• 2 NADH +H+
• 2 CO2
• 2 Acetyl CoA

Question 8

what are 3 enzymes in the Krebs cycle?

Answer 8

• citrate synthase
• isocitrate dehydrogenase
• a-ketoglutarate dehydrogenase.

Question 9

what is the function of
1. citrate synthase
2. isocitrate dehydrogenase
3. a-ketoglutarate dehydrogenase

Answer 9

1. turns citric acid to citrate.
2. enzyme that is rate limiting.
   - cis-aconitate is the substrate.
3. removal of hydrogen atoms.
   - brings CA2+ into the cell.

Question 10

draw and explain what is Happening in the ECT

Answer 10

See notebook.

Question 11

what is a rate limiting enzyme of the ETC?

Answer 11

• cytochrome oxidase