Fat Burning Metabolism and Energy Systems

Question 1

What is the primary fuel source used during low-intensity aerobic exercise for fat burning?

Accepted Answer

Free fatty acids

Answer

Glycogen

Answer

Dietary protein

Answer

Blood glucose

Question 2

Which metabolic process breaks down stored triglycerides into free fatty acids and glycerol?

Accepted Answer

Lipolysis

Answer

Gluconeogenesis

Answer

Lipogenesis

Answer

Glycolysis

Question 3

The 'fat-burning zone' is typically defined as what percentage of maximum heart rate?

Accepted Answer

60–70%

Answer

40–50%

Answer

80–90%

Answer

95–100%

Question 4

Which organelle is the primary site of beta-oxidation of fatty acids?

Accepted Answer

Mitochondria

Answer

Nucleus

Answer

Ribosome

Answer

Endoplasmic reticulum

Question 5

Basal Metabolic Rate (BMR) accounts for approximately what percentage of total daily energy expenditure in a sedentary adult?

Accepted Answer

60–75%

Answer

10–20%

Answer

30–45%

Answer

85–95%

Question 6

What is Excess Post-exercise Oxygen Consumption (EPOC)?

Accepted Answer

The elevated metabolic rate that persists after high-intensity exercise

Answer

The oxygen debt accumulated during warm-up

Answer

The increased breathing rate during aerobic activity

Answer

The oxygen used to digest a post-workout meal

Question 7

Which hormone primarily mobilizes free fatty acids from adipose tissue during exercise?

Accepted Answer

Epinephrine (adrenaline)

Answer

Insulin

Answer

Glucagon

Answer

Oxytocin