The Digestive and Excretory Systems

Question 1

Why does food need to be digested?

Revolt · Accepted Answer

Food needs to be digested so that it can be broken down into smaller molecules, such as nutrients and sugars, which the body's cells can then absorb and use for energy, growth, and repair.

Question 2

What change needs to be done to correct the diagram showing food moving through the digestive system?

Revolt · Accepted Answer

B: The small intestine and the stomach need to be switched.

Question 3

What is peristalsis and where does it occur?

Revolt · Accepted Answer

Peristalsis moves food through the digestive system. When muscles contract, food is pushed to an area of relaxation. The muscles above the food contract further, pushing the food along. It occurs in the esophagus and intestines.

Question 4

Which statements correctly describe the digestive system? Select four options.Food is cut into pieces in the mouth.Food becomes dry in the mouth.Proteins are broken down in the stomach.Carbohydrates are first broken down in the stomach.Food becomes mostly solid in the large intestine.Fat is broken down into smaller droplets in the small intestine.

Revolt · Accepted Answer

A: Food is cut into pieces in the mouth.; C: Proteins are broken down in the stomach.; E: Food becomes mostly solid in the large intestine.; F: Fat is broken down into smaller droplets in the small intestine.

Question 5

What do the digestive and excretory systems have in common?

Revolt · Accepted Answer

C: Both get rid of waste material.

Question 6

In the excretory system, where does the waste material in the body come from and why does the body need to get rid of these waste materials?

Revolt · Accepted Answer

The cells of the body produce waste materials. The body needs to get rid of these waste materials because they can make us sick. Getting rid of this waste keeps us healthy.

Question 7

Identify the functions of the labeled parts. A: B: C: D:

Revolt · Accepted Answer

B: carries urine to the bladder

Question 8

Which processes happen in the kidney? Select three options.

Revolt · Accepted Answer

A: production of urine; D: filtration of waste material from blood; E: reabsorption of sugar and water

Question 9

What did you include in your response? Check all that apply.

Revolt · Accepted Answer

A: Food needs to be digested into a simpler form.; B: Nutrients and sugar molecules are used by the cell to stay alive.

Question 10

What did you include in your response? Check all that apply.

Revolt · Accepted Answer

A: Peristalsis moves food through the digestive system.; B: Muscles contract to push food along in the esophagus and intestines.

The Digestive and Excretory Systems Answers

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