Digestive System

Question 1

What is the function of the digestive system?

Answer 1

The function of the digestive system is

Question 2

What is ingestion, digestion and absorption?

Answer 2

Ingestion is the act of eating food
Digestion is breaking down food chemical and mechanical
Absorption is absorbing digested food to blood stream

Question 3

What is Physical Digestion?

Answer 3

Physical Digestion is mechanically breaking down food by biting, chewing and grinding it

Question 4

What is Chemical Digestion?

Answer 4

Chemical Digestion is using different enzymes or tiny proteins to alter the structure of the food

Question 5

Describe the pathway of food

Answer 5

When you swallow the food, it travels as a bolus down the oesophagus into the stomach. After the stomach digests part of the food, it travels into the small and large intestines

Question 6

Function of Salivary Glands

Answer 6

Secretion of saliva that creates the enzyme amylase that breaks down carbohydrase

Question 7

Function of Oesophagus

Answer 7

Transport food to the stomach

Question 8

Function of Small Intestine

Answer 8

absorption of water, organic substrates, vitamins and ions

Question 9

Define Peristalsis

Answer 9

Peristalsis is a muscular contraction which helps move food down the digestive tract

Question 10

Explain the purpose of bile

Answer 10

Bile is a green yellow fluid that is secreted by the liver cells to carry away waste

Question 11

Identify the key enzyme protease

Answer 11

protease decomposes protein into amino acids

Question 12

Identify the key enzyme lipase

Answer 12

lipases digests lipids to form fatty acids and glycerol

Question 13

Identify the key enzyme amylase

Answer 13

amylase breaks down starch into glucose

Question 14

Describe the structure of villi

Answer 14

Villi are specialised for absorption and have thin walls that are 1 cell thick

Question 15

What does villi and microvilli do?

Answer 15

They increase the surface area for absorption of nutrients