What is the main function of the respiratory system?
a. to send signals from one part of the body to other parts of the body
b. to break down food into nutrients that can be circulated throughout the body
c. to exchange oxygen and carbon dioxide gases within the body
d. to protect the body against foreign substances, such as bacteria and viruses

Why is a lunch consisting of pizza, fruit, and salad a better choice than a lunch with the same number of calories from pizza alone? a)both lunches provide the same amount of energy but the lunch of pizza, salad, and fruit provides more nutrients. b)both lunches provide the same amount of nutrients but the lunch of pizza, salad, and fruit provides more energy. c)both lunches are healthful but the lunch of pizza, salad, and fruit provides more energy for metabolism. d)both lunches are healthful but the lunch of pizza, salad, and fruit is likely to have a higher fat content.

Anutritional study should take all of the following into account except taste in music. family medical history. work and home responsibilities. lifestyle factors, such as smoking or alcohol consumption.

Ladonna is overweight and loves fast food. which is the best diet for ladonna to adopt? a. a diet high in protein and low in fat and sugar b. a diet high in calcium and low in fiber c. a diet high in fiber and low in fat and sugar reset next