Unit 2: Energy and Nutrients Flashcards
why do we need energy?
for all the basic functions of the body; physical activity, Maintain a normal body temp, carry out normal bodily functions, growth and repair of body tissues.
what is energy provided by?
Macronutrients
how many calories does fat provide us with?
9
how many calories does carbohydrate provide us with?
3.75
how many calories does protein provide us with?
4
what is BMR?
base metabolic rate; the amount of energy a body needs when it is completely at rest
how many calories does an average person burn while at rest?
1.1 every minute
do infants have a low or high bmr for their size?
High
why do men have a higher bmr?
more muscle mass
what percent of the energy we need daily is to maintain our metabolism?
75%
what is PAL?
Physical activites Level
does age reduce or increase energy needs?
decrease
how many extra calories does a women need in the last 3 months of pregnancy
200cals extra
what happens if we eat less food than we need?
fat stores are used for energy and we lose weight
what happens if we eat more food than we need?
excess calories are stored as fat and we gain weight
