Body systems: Digestive system

Question 1

What is the function of the digestive system?

Answer 1

The function of the digestive system is digestion and absorption.

Question 2

What are the main food groups?

Answer 2

Carbohydrats, Fats, Proteins.

Question 3

What are fats & Carbohydates used for?

Answer 3

Fats & Carbohydates are both are used for energy.

Question 4

What are proteins used for?

Answer 4

Proteins are used for growth and repair of cells and tissues.

Question 5

What is the test for glucose (Sugar)?

Answer 5

• 1. Add blue Benedict’s solution to the food in a test tube.
• 2. Heat in a beaker of boiling water for 5 minutes.
• 3. The solution turns from blue to green or orange if glucose is present.

Question 6

What is the test for starch?

Answer 6

• 1. Put a small amount of food in a dimple in a spotting tile.
• 2. Add iodine solution.
• 3. If the solution turns from orange to black, starch is present.

Question 7

What is the test for protein?

Answer 7

• 1. Mix the food with water in a test tube.
• 2. Add Biuret solution.
• 3. If the solution changes from blue to purple, protein is present.

Question 8

What is the role of enzymes in the digestive system?

Answer 8

the role of enzymes in the digestive systems is breaking down food particles during digestion.

Question 9

What happens to digested foods?

Answer 9

After digestion, all the simple food chemicals are absorbed through the wall of the small intestine into the blood.

Question 10

What happens to undigested foods?

Answer 10

Excess water is absorbed from the waste into the blood by the walls of the large intestine. It then stays in the rectum and comes out the anus.

Question 11

What are the health risks of an unhealthy diet?

Answer 11

1. becoming overweight or underweight
2. children not growing properly
3. having less resistance to disease
4. poor functioning of the body organs and systems (eg the brain, kidneys, liver etc)