Production of ATP in muscle fibers

Question 1

What is ATP used for in muscle fibers?

Answer 1

It is used for powering the contraction cycle and to pump calcium into the (SR).

Question 2

What are the 3 ways a muscle fiber produces ATP?

Answer 2

1: From Creatine Phosphate
2: Anaerobic Glycolysis
3: Aerobic respiration

Question 3

What is the Process of Creatine Phosphate?

Answer 3

While muscle is relaxed it produces more ATP than it needs for resting metabolism.
ATP is used for the production of “Creatine Phosphate”.

When contraction begins & the ADP level rises, (CK) catalyses the transfer of high energy to phosphate from creatine back to ADP.

Question 4

Where does Creatine get synthesized in the body?

Answer 4

In the liver, kidneys and pancreas and then transported to muscle fibers.

Question 5

What is the process of Anaerobic Glycolysis?

Answer 5

When Creatine in the muscle is gone, Glucose is catabolized to generate ATP.

Question 6

What is the process of Aerobic Respiration?

Answer 6

If enough O2 is present then the Pyruvic Acid formed by the Glycolysis enters the mitochondria, where it undergoes “Aerobic Respiration”.

Question 7

What type of ATP generation does not require O2?

Answer 7

Anaerobic Glycolysis.

Question 8

What is Muscle Fatigue?

Answer 8

The inability of a muscle to maintain force of contraction after prolonged activity is called Muscle Fatigue.

Question 9

What is O2 debt?

Answer 9

…

Question 10

What is the extra O2 used for in the body after Exercise has stopped?

Answer 10

There are 3 things it can be used for:

Question 11

What is Creatine Phosphate?

Answer 11

This is an Energy rich molecule that is found in muscle fibres.

Question 12

What is the Enzyme used for turning ATP into creatine phosphate & ADP?

Answer 12

Creatine Kinase (CK).

Question 13

What is the Molecule Creatine?

Answer 13

It is a small amino acid like molecule that is Synthesized in the liver, kidneys and pancreas then transported to a muscle fiber.

Question 14

Where can Creatine phosphate be found in the muscle fiber?

Answer 14

It is plentiful in the Sarcoplasm of the muscle cell / Fiber of a Relaxed muscle.

Question 15

What is the Molecule that is 3-6 times more powerful than ATP?

Answer 15

Creatine Phosphate.

Question 16

What is the end result of Creatine phosphate?

Answer 16

The canalization of creatine to ADP generates new ATP molecules.

Question 17

What is the first type of ATP formation from the muscle cells?

Answer 17

It is creatine phosphate because it takes very little time.

Question 18

When does Anaerobic Glycolysis begin In the muscle?

Answer 18

It starts when the muscle activity continues and the supply of creatine phosphate within the muscle fiber is depleted.

Question 19

What is the process called “Facilitated Diffusion”?

Answer 19

This process is when Glucose passes into the muscle fiber from the blood.

Question 20

What happens during Anaerobic Glycolysis?

Answer 20

When the Glucose is quickly broken down into 2 molecules of Pyruvic Acid by the Muscles Glycogen.
Then Lactic Acid is formed as a byproduct.

Question 21

What are the steps to Aerobic respiration?

Answer 21

Amino acids form protein breakdown
Fatty acids liberated from adipose tissue
Pyurvic Acid from glycolysis
O2 from Hemeglobin in the blood or myoglobin from the Muscle tissue

All used for the production of ATP in the Mitochondria
Kerbs Cycle.