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Year 9 Biology > Digestion > Flashcards

Digestion Flashcards

0
Q

What is digestion?

A

Food broken down from insoluble pieces to soluble pieces

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1
Q

What is ingestion?

A

Food taken into the mouth

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2
Q

What is absorption?1

A

Soluble substances that are absorbed into the blood stream

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3
Q

What is assimilation?

A

Soluble products taken into the cells and used

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4
Q

What is egestion?

A

Removal of waste out the anus

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5
Q

What are enzymes?

A

Speeds up chemical reaction without being used up

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6
Q

What is amylase?

A

Breaks down starch to glucose

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7
Q

What is protease?

A

Breaks down protein into amino acids

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8
Q

What is lipase?

A

Breaks down fat into fatty acids and glycerol

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9
Q

What happens in the mouth?

A

Digestion begins

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10
Q

What happens in the oesophagus?

A

Food is pushed along this tube to the stomach

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11
Q

What is peristalsis?

A

Muscular contraction and relaxation moving the food through the digestive system

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12
Q

What happens in the stomach?

A

Food is mechanically digested by the constant muscle contractions

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13
Q

What does hydrochloride acid do?

A

Maintains the correct pH for the protease enzyme to work and kills any bacteria

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14
Q

What is the first part of the small intestine called?

A

Duodenum

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15
Q

What is made in your liver?

A

Bile

16
Q

What is the gall bladder?

A

Where bile is stored after it is made in the liver

17
Q

What does bile do?

A

Breaks oil droplets into an emulsion

18
Q

What is emulsion?

A

Formed when fat is broken down into droplets which increases the surface area allowing the enzymes to function

19
Q

What is the pancreas?

A

Contains protease, amylase, lipase

20
Q

What is the ileum?

A

Where digestion is completed

21
Q

What is absorption?2

A

The movement of digested food molecules from the intestine to the blood

22
Q

What are villi?

A

Finger like projections which increase the surface area for absorption

23
Q

What are micro villi?

A

Surrounds villi to increase the surface area further

24
Q

What is the wall like?

A

Very thin

25
Q

What is left in the large intestine?

A

A wet mixture of indigested fibre, bacteria and dead cells

26
Q

What is reabsorption?

A

In the large intestine water is re absorbed back in the blood

27
Q

What does indigested food need?

A

Fibre to help it move smoothly along the large intestine

28
Q

What is the remaining called?

A

Faeces

29
Q

Where is the faeces stored?

A

The rectum

30
Q

What is egestion?

A

The removal of undigested material from the the body through the anus

31
Q

What is excretion?

A

The removal of toxic metabolic waste substances produced through chemical reactions in the body

Year 9 Biology (6 decks)

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