Week 1

Question 1

What is ventilation?

Answer 1

Movement of air between the atmosphere and the lungs

Question 2

What is repiration?

Answer 2

The exchange of )2 and CO2 between the lungs and the blood

Question 3

If ventilation is __________, respiration will be impaired.

Answer 3

Impaired

Question 4

Aerobic Metabolism

Answer 4

Requires oxygen

Fuel source: Utilizes carbohydrates, fats, and proteins

Occurs in the mitochondria

By-products: Water (H₂O) and carbon dioxide (CO₂)

ATP yield: ~38 ATP per molecule of glucose

Efficiency: Highly efficient, ~19x more than anaerobic metabolism

Used in: Long-duration, low-to-moderate intensity activity

Question 5

Anerobic Metabolism

Answer 5

Does NOT require oxygen

Fuel source: Utilizes only carbohydrates (glucose)

Occurs in the cytoplasm

By-product: Lactic acid (lactate + H⁺)

ATP yield: ~2 ATP per molecule of glucose

Efficiency: Low; quick energy burst, not sustainable

Used in: Short bursts of high-intensity activity