W2-L2: Human Energy Expenditure During rest and Physical Activity

Question 1

What are the Components of Total Daily Energy Expenditure?
(TDEE)

3

Answer 1

Resting metabolic Rate (60-75%)
Thermic Effect of PA (15-30%)
Thermic Effect of Feeding (10%)

Question 2

What is the metabolic size concept?
What is the Surface Area Law?

Answer 2

Surface Area Law:
fundamental relationship between heat production and body size

• RMR vary in proportion to the square of body surface area per hour (kcal/m 2/h)
• Females have 5 to 10% lower BMR than males of the same age and size from more fat and less fat-free mass
• The concept of metabolic size relates BMR to body mass raised to the 0.75 power (BM^0.75)

Question 3

Logarithmic Plot of Body Mass and Metabolic Rate for Birds and Mammals of Different Size and Shape?

Answer 3

increased mass correlates w/ increase BMR

Question 4

BMR as a Function of Age and Sex

Answer 4

not true (not much gender variatian)

Question 5

effect of metabolic rate on age

Answer 5

metabolic rate stays similar till the age of 60

Question 6

O2 consumption of various body tissues at rest for a 65kg man

Answer 6