Exam Questions

List the features of a good study

• Clear aim

• Representative sample

• Large sample size

• Valid & reliable results

• Were all relevant variables considered & controlled?

Explain the concepts of energy intake and expidenture

• Energy is gained in the form of dietary carbs, fat & protein

• When these molecules are digested, absorbed & assimilated, their stored chemical energy is added to the body

• These stored molecules are broken down in processes such as respiration, where there energy is used e.g. muscle contraction

• Energy expenditure is connected to BMR

Explain how energy imbalances are related to weight gain or loss

• When energy gain = energy used there is no net weight gain/loss

• When more energy is consumed than used there is weight gain

• When more energy is used than gained there is weight loss

• Excessive weight gain can lead to obesity

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