Lance would like to lose two pounds a week. if his present energy intake is 4,200 kcal a day and his energy expenditure does not change, how many kilocalories should he consume each day to achieve his goal? 2,000 2,500 3,200 3,700

3200 kcal per day

Explanation:

Two pounds weight loss a week = approx 7000 kcal per week with 1 pound equal approx 3500 kcal

Total amount energy intake per week = 4200 × 7 = 29400 kcal

two pound loss = 7000 kcal

29400 - 7000 = 22400 kcal

22400 kcal / 7 =  3200 kcal per day

so Lance will have to reduce his energy intake to 3200 kcal

b) the heart is a pump made of muscle and that is difficult to grow in the lab.