Answer to Question 1
1
Rationale: Food contains stored chemical energy that provides energy to power our body and produce heat to maintain body temperature. The number of calories we need to meet our daily energy expenditures depends on many factors including age, body size activity level, and metabolic rate. To lose a pound of body fat the energy balance must be altered by approximately 3,500 kilocalories/day. The quality and balance of the diet is more important than the amount of food we eat to ensure that we have all of the nutrients our bodies need to function properly.
Answer to Question 2
A
Feedback:
There are 4 cal/g in carbohydrate and protein, 9 cal/g in fat, and 7 cal/g in alcohol.