ORGANISATION

Question 1

What is a tissue ?

Answer 1

A group of similar cells that work together to perform a specific function

Question 2

What are examples of tissues in mammals?

Answer 2

Muscular tissue, glandular tissue, epithelial tissue

Question 3

What is an organ?

Answer 3

An organ is a group of different tissues that work together to perform a certain function

Question 4

What tissues are the stomach made up of ?

Answer 4

Muscular tissue, glandular tissue, epithelial tissue

Question 5

What do the tissues in the stomach do ?

Answer 5

Muscular tissue churns up food, glandular tissue makes digestive juices, epithelial tissue covers the outside and inside of the stomach

Question 6

What is an organ system ?

Answer 6

An organ system is a group of organs working together to perform a specific function

Question 7

Give an example of an organ system

Answer 7

Digestive system

Question 8

What are enzymes?

Answer 8

Enzymes are biological catalysts that speed up useful chemical reactions in the body

Question 9

What is the part called that the substrate fits into in an enzyme?

Answer 9

Active site

Question 10

What two factors affect enzymes?

Answer 10

Temperature and ph

Question 11

What happens to enzymes if the temperature is too high or if ph is too high or low ?

Answer 11

With higher temperatures bonds in the enzymes break and it becomes denatured, when ph changes bonds are interfered with and cause denaturing

Question 12

What is the optimum pH for most enzymes ?

Answer 12

pH 7 as its neutral

Question 13

What pH does pepsin work best at and why?

Answer 13

Pepsin breaks down proteins in the stomach and work best at pH 2 so is well suited in the acidic conditions of the stomach

Question 14

How do you test for starch ?

Answer 14

Use iodine and it will turn to blue-black

Question 15

How do you calculate the rate of reaction ?

Answer 15

1000/ time

Question 16

What are proteins broken down into ?

Answer 16

Amino acids

Question 17

What are fats and lipids broken down into ?

Answer 17

Fatty acids and glycerol

Question 18

What is starch broken down into ?

Answer 18

Maltose

Question 19

What enzyme breaks down starch ?

Answer 19

Amylase

Question 20

Where is amylase made ?

Answer 20

The salivary glands, the pancreas, the small intestine

Question 21

What enzyme breaks down proteins?

Answer 21

Protease

Question 22

Where is protease made ?

Answer 22

The stomach, the pancreas, small intestine

Question 23

What enzyme breaks down lipids ?

Answer 23

Lipase

Question 24

Where is lipase made ?

Answer 24

The pancreas, the small intestine

Question 25

What dies bile do ?

Answer 25

Bike neutralises stomach acid as the pH is too acidic for the small intestines enzymes to work properly, it also emulsifies fats giving them a bigger surface area for lipase to work on so speeds up digestion

Question 26

Where is bile produced ?

Answer 26

In the liver

Question 27

Where is bile stored ?

Answer 27

Gall bladder

Question 28

Why does the stomach produce hydrochloric acid ?

Answer 28

To kill bacteria and give the right pH for the protease enzyme to work

Question 29

What does the pancreas do ?

Answer 29

Produces protease , amylase and lipase and releases them into the small intestine

Question 30

What does the small intestine do ?

Answer 30

Produces protease, amylase and lipase and food is absorbed into the blood

Question 31

How do you test for sugar?

Answer 31

Use benedicts solution and it will turn from blue to green to brick-red

Question 32

How can you test for proteins ?

Answer 32

Use biuret solution and it will change from blue to purple

Question 33

How do you test for lipids ?

Answer 33

Use Sudan iii stain solution and there will be a layer if bright red