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1. GCSE combined master > B7 Digestion > Flashcards

B7 Digestion Flashcards

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1
Q

Name the body system shown on the diagram

A

Digestive system

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2
Q

Name five organs found in the digestive system

A

Oesophagus
Stomach
Liver
Pancreas
Small intestine
Large intestine

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3
Q

What is the purpose of the digestive system?

A

Breakdown food into small soluble molecules

Absorb digested food into blood

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4
Q

Enzymes are biological catalyst.

What does this mean?

A

Biological - made in cells

Catalyst - Speed up chemical reactions

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5
Q

Name the theory used to explain how enzymes work

A

Lock and key theory

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6
Q

Name an enzyme that digests carbohydrates

A

Carbohydrase

or

Amylase

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7
Q

Name the carbohydrase that breaks down starch

A

Amylase

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8
Q

What is formed when starch is digested?

A

Simple sugar

or

Glucose

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9
Q

Name the enzyme that digests protein.

A

Protease

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10
Q

What is formed when proteins are digested?

A

Amino acids

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11
Q

Name the enzyme that digests lipid

A

Lipase

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12
Q

What is formed when lipids are digested?

A

Fatty acids

and

glycerol

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13
Q

Name the organ that makes bile.

A

Liver

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14
Q

Where is bile stored?

A

Gall bladder

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15
Q

What is the purpose of bile?

A

Neutralises hydrochloric acid released in the stomach.

Emulsifies lipid

(forms small droplets of fat to increase the surface area for digestion)

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16
Q

Where is amylase made?

A

Salivary glands and pancreas

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17
Q

Where is lipase made?

A

Pancreas

Wall of small intestine

18
Q

Which letter identifies the large intestine

A

D

19
Q

Where is protease made?

A

Stomach

Pancreas

Wall of small intestine

20
Q

Which letter identifies the small intestine

A

E

21
Q

Which letter identifies the oesophagus

A

B

22
Q

Which letter shows where bile is stored?

A

F

23
Q

In which parts of the digestive system is starch digested?

A

Mouth
Small intestine

24
Q

In which parts of the digestive system are proteins digested?

A

Stomach and small intestine

25
Q

In which part of the digestive system is lipid digested?

A

Small intestine

26
Q

Describe the biochemical test for starch

A

Add iodine solution
Positive result - blue or black

27
Q

Describe the biochemical test for glucose

A

Add Benedict’s solution
Heat
Positive result - green, yellow, orange, brick red

28
Q

Describe the biochemical test for protein

A

Add Biuret solution
Positive result - lilac, purple or violet

29
Q

Describe the biochemical test for lipid

A

Add ethanol and mix gently
Pour into cold water
Positive result - white emulsion

30
Q

What happens to an enzyme when it is heated?

A

Denatures
Changes shape and can no longer work

31
Q

What happens to an enzyme when it is placed in the wrong pH?

A

Denatures
Changes shape and can no longer work

32
Q

What is the function of the small intestine?

A

Digests food
Absorbs the digested food into the bloodstream

33
Q

What is the function of the large intestine?

A

Absorbs water from undigested food, producing faeces.

34
Q

How does the shape of an enzyme affects its function?

A

Enzymes have a specific shape
The active site is complementary to its substrate

35
Q

What is metabolism?

A

All the reactions in an organism

36
Q

How are the products of digestion used?

A

Respiration
Build larger molecules

37
Q

Which letter identifies the liver?

A

A

38
Q

Which letter identifies the pancreas?

A

C

39
Q

Which letter identifies the stomach?

A

B

40
Q

The enzymes active site and substrate are complementary in shape.

What does this mean?

A

Substrate fits into the active site

1. GCSE combined master (25 decks)

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