Energy Intake And Expenditure Flashcards

1
Q

What can internal energy liberated during breakdown of an organic molecule appear as

A

Heat
Can be used to perform work

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2
Q

What is energy expenditure the sum of

A

Basal metabolic rate
Thermic effect of food
Energy expended with physical activity

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3
Q

What is basal metabolic rate

A

The amount of energy expended while at complete rest

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4
Q

What is thermic effect of food

A

The energy required to digest and absorb food

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5
Q

What is oxygen consumption (vo2)

A

The volume of oxygen used by your body to convert energy from the food into work
All energy-releasing reactions in the body ultimately depend on oxygen use, therefore vo2 is an indirect yet highly accurate measurement of energy expenditure

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6
Q

What is metabolic equivalent of task (MET)

A

Multiples of resting metabolic rate
1 MET = energy expenditure for sitting quietly
= 3.5ml o2/kg body weight/min

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7
Q

What are the energy expenditure measures

A

Calories (kcal)
Kilojoule (kg, equals 1000J)

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8
Q

What is a calorie (kcal)

A

1 calorie expresses the quantity of heat needed to raise the temperature of 1L of water 1*c

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9
Q

What is a kilojoule

A

Standard unit to express food energy
In humans, 1J = the energy released in 1sec as heat by an average sized person at rest

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10
Q

How to convert kcal to kJ

A

Multiple kcal value by 4.184

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11
Q

What is the most energy dense nutrient

A

Fat

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