Question

1. What form of energy do cells rely on most to carry out important processes?

2. At what point during fasting does the body start using ketones for fuel? When does it use amino acids?

3. What process occurs during swallowing that ensures food ends in the stomach?

4. How many calories would a person need to decrease in one week in order to lose one pound?

5. Can 2 people with the same body mass index have different body compositions &/or different health risks? why or why not?

6. When weight lost first occurs, what is being lost?

7. Which substance makes up more weight of the human body than any other substance?

Answer 1

1. The source of the energy required to regenerate ATP is the chemical energy stored in food (e.g. glucose). The cellular process of releasing energy from food through a series of enzyme-controlled reactions is called respiration .

Aerobic respiration occurs if oxygen is present in the cell.

Anaerobic respiration occurs if oxygen is absent in the cell.