Aerobic Metabolism 2-Lecture 17

Question 1

ETC Basic concepts

Answer 1

ETC is the final metabolic pathway in the aerobic production of ATP.

Takes place in the mitochondria.

Consists of 4 fixed protein complexes

Question 2

What is the Role of Oxygen in the ETC

Answer 2

Molecular oxygen is stable-not very reactive.

Electrons arrive at complex IV react with oxygen converting it to negatively charged reactive molecule.

Protons react with the highly charged oxygen to form h2o

Removal of 2 Hydrogen atoms equivalent to removing 2 protons and 2 electrons

Oxygen is the final elctron acceptor

Question 3

What happens if you can’t get enough oxygen into the ETC?

Answer 3

trucks with NADH AND FADH back up because all those electrons stuck in inner mictochordia membrane back up and nowhere to go.

No acetyl COA, results in lots of Pyruvate (remember it converts to lactate).

Question 4

VO2 Max

Defintion

Answer 4

Highest volume of oxygen you can take in during exercise.

Question 5

What is the primary energy sources for anaerobic?

Answer 5

PCR(ADP-ATP)

Anaerobic glycolysis(carbs)

Aerobic -Need high capacity to produce a lot of ATP overtime (breakdown of carbs and fats.

Question 6

Explain this graph will be on test for deffo

Answer 6

ATP/PCR-main source of energy for first 5 seconds

peaks in output at approx 5 secs

Fatigues quickly due to depletion of ATP

Lactic acid system takes over

main source of energy from 10 sec-30 sec

fatigue builds due to lactic acid-continues for 2 mins.

can continue to use anaerobic glycolysis after 30 seconds because of lactic acid

Question 7

Exercise intensity what do we use macros for each?

Answer 7

Low intensity-Fatty acids/fats

High intensity-we use carbs