Energy Metabolism

Question 1

What is metabolism?

Answer 1

• Metabolism is the process by which our bodies convert what we eat and drink into energy.

Question 2

What is ATP?

Answer 2

A source of chemical energy

Question 3

What does the ability exercise depend upon?

Answer 3

The conversion of chemical energy into mechanical energy

Question 4

What is energy needed for?

Answer 4

Performing work or producing force

Question 5

Why is ATP essential for energy?

Answer 5

• ATP is the only source of energy that can be used directly for muscle contraction and all other energy-requiring processes in the cell.

Question 6

Where does the connection between a motor neuron axon terminal and a muscle fibre occur?

Answer 6

A neuromuscular junction site.

Question 7

What allows the conversion of ATP to ADP

Answer 7

Actin and myosin working together

Question 8

What is the resting concentration of ATP in skeletal muscle?

Answer 8

About 4 to 5 mmol/Kg wet weight

Question 9

What is the total quantity of ATP in an adult?

Answer 9

Approximately 0.10 mol/L

Question 10

What process help maintain the concentration of ATP in the sarcoplasm?

Answer 10

Phosphocreatine hydrolysis

Anaerobic metabolism of glycogen or glucose (glycolysis).

Aerobic metabolism (i.e. oxidation) of acetyl-CoA derived principally from breakdown of carbohydrate or fat.