B3 - Organisation and Digestive System

Question 1

Name 5 levels of organisation

Answer 1

Cells
Tissues
Organs
Organ systems
Organisms

Question 2

What is a tissue?

Answer 2

Group of cells working together with similar functions and structures.

Question 3

What is an organ?

Answer 3

Group of tissues working together to perform function

Question 4

What does liver produce?

Answer 4

bile

Question 5

What does bile do?

Answer 5

Neutralises hydrochloric acid from the stomach and emulsifies fat to form small droplets with a large surface area.

Question 6

What are the two functions of saliva?

Answer 6

• lubrication to help swallowing
• amylase to break down starch

Question 7

Three enzymes in pancreas

Answer 7

amylase
protease
lipase

Question 8

What are enzymes?

Answer 8

Proteins that catalyse specific reactions in organisms

Question 9

Function of amylase

Answer 9

Break starch down into glucose

Question 10

Where is amylase produced?

Answer 10

Salivary glands, small intestine, pancreas

Question 11

Function of protease

Answer 11

Break protein down into amino acids

Question 11

Where is protease produced?

Answer 11

Stomach, pancreas, small intestine

Question 12

Function of lipase

Answer 12

Break lipids down into fatty acids and glycerol

Question 13

Where is lipase produced?

Answer 13

Pancreas and small intestine

Question 14

Two factors that affect rate enzyme activity

Answer 14

temperature and pH

Question 15

What does denatured mean?

Answer 15

Shape of enzyme’s active site is changed by extreme temperatures or pH, so it can no longer bind to the substrate.

Question 16

What is an organ system?

Answer 16

Group of organs working together to perform a specific function.