Metabolism 2

Question 1

Energy balance equation

Answer 1

Energy intake = (internal heat produced + external work + internal work + energy storage)

Question 2

First Law of Thermodynamics (Layman’s)

Answer 2

Energy cannot be created or destroyed (but it can be converted from one form to another)

Question 3

Energy input

Answer 3

-ingested food
-cells capture energy from high energy bonds (ATP)

Question 4

Energy output

Answer 4

-external work (contraction of skeletal muscles)
-thermal energy/heat (25%)
-internal work (shivering)

Question 5

Neutral energy balance

Answer 5

Energy input = Energy output
(Body weight remains constant)

Question 6

Positive energy balance

Answer 6

Energy input > Energy output
(Body weight increases, stored as adipose)

Question 7

Negative energy balance

Answer 7

Energy input < Energy output
(Body weight decreases, must use stored energy to supply needs)

Question 8

Metabolic rate

Answer 8

-total amount of energy needed to expend (internal/external) in order to perform a task

Question 9

Metabolic rate equation

Answer 9

Energy expenditure / unit of time