Period 1 test 3b Obtaining Energy and Removing Waste

What is the function of peristalsis?

• to absorb nutrients into the blood

• to remove excess liquid from the body

• to move food through the digestive system

• to chemically digest food to release nutrients

When does the first step of digestion usually occur?

• when the organism discovers the food

• when the food is chewed

• when the food is swallowed

• when the nutrients are absorbed

Food enters the human body through the _____.

• Liver

• mouth.

• esophagus

• intestine

Digestion begins in the mouth with chewing and _____________________ beginning to break down food.

Choose the answer which lists the correct order of the digestion process.

• C, D, A, B

• C, A, D, B

• A, C, D, B

• A, B, C, D

Chewing is what kind of digestion?

Why is it necessary to have both mechanical and chemical digestion?

Absorption in the small intestines occurs through the walls of fingerlike projections called _________________________ .