Lecture #3 Slides - Metabolism

Question 1

what is a calorie?

Answer 1

the energy required to produce ATP

Question 2

how many calories is a kilocalorie (kcal)?

Answer 2

1000 calories = 1 kcal

Question 3

Food labels and most popular diet discussions are for ____ kcal per day. What is the problem with this?

Answer 3

2000 - problem is not everyone is the same, so the 2000kcal diet would not work for everyone.

Question 4

What is direct calorimetry?

Answer 4

you put food inside a closed vessel, and heat it up until it is fully gone, and the measure the amount of energy that was used - then you can tell how many calories was in it - you can also tell how many proteins or carbohydrates ect. were in it and how much contributed to calories

Question 5

what are the Cal/g (energy) for carbohydrates, lipids and proteins?

Answer 5

CHO & Protein = 4.2cal/g

Lipid = 9.4 Cal/g

Question 6

“minimal amount of energy needed to maintain basic physiological functions”

Answer 6

basal metabolic rate (BMR)

Question 7

“energy required to maintain basic physiological functions in a relaxed, awake and reclined state”

Answer 7

resting metabolic rate (RMR)

Question 8

metabolic rate varies with what four variables?

Answer 8

age, gender, body size, body composition

Question 9

Starting at age __ you have a reduction in MR that continues into early adulthood

Answer 9

25

Question 10

what is TEF?

Answer 10

thermic effect of food -takes energy to digest and absorb food - like a tax, there is a cost

Question 11

formula for total daily energy expenditure?

Answer 11

RMR + TEF + PA

Question 12

how do you calculate RMR?

Answer 12

multiply body weight in pounds (2.2lbs=1kg) by 10 for females or 11 for males (correct for target weight!!!!)

Question 13

How do you calculate TEF?

Answer 13

its 10% of RMR