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Digestive System > Mechanical Digestion > Flashcards

Mechanical Digestion Flashcards

1
Q

Where does digestion start?

A

Digestion begins in the mouth

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2
Q

What do the teeth and saliva do?

A

Teeth chew food and break it into smaller pieces that won’t block the oesophagus.
Saliva moistens food so it slides down

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3
Q

What food group does the enzymes in the saliva break down?

A

Carbohydrates

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4
Q

What is mechanical digestion?

A

Mechanical digestion used muscles to make our teeth cut and grind up food into small chunks

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5
Q

What do enzymes do?

A

Enzymes are biological catalysts that speed up chemical reactions

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6
Q

What is peristalsis?

A

Peristalsis are wave-like contractions and relaxations of the muscle.
Muscles contract rhythmically to move food from the oesophagus to the rectum

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7
Q

What can be digested in the small intestine?

A

Carbohydrates, proteins and lipids

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8
Q

What can the stomach digest?

A

Protien

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9
Q

What enzyme breaks down carbohydrates?

A

Amylase

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10
Q

What enzyme breaks down proteins?

A

Protease

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11
Q

What digests lipids?

A

Lipase

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12
Q

What is the product of carbohydrates and amylase?

A

Sugars

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13
Q

What is the product of proteins and pepsin?

A

Amino acids

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14
Q

What is the product of lipids and lipase?

A

Fatty acids, Glycerol

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15
Q

What is the enzyme in the lock and key theory?

A

The lock

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16
Q

What is the substrate in the lock and key theory?

A

The key

17
Q

What is the first step in an enzymes action?

A

The enzyme finds the substrate to start the action
(Must fit exactly)

18
Q

What is the 2nd action of an enzyme?

A

The substrate enters the active site of the enzyme

19
Q

What is the 3rd action of an enzyme?

A

The enzyme splits (breaks down) the substrate into 2 smaller pieces

20
Q

What is the last action of the enzyme?

A

The substrate exits the active site

21
Q

How does vomiting occur?

A

Caused by stress, pain or infections.
Forces food back up through the stomach and out through the mouth.

22
Q

What is bile?

A

Bile is made in the liver, stored in the gall bladder and released into the small intestine to aid digestion of fats 

23
Q

What are enzymes made of?

A

Proteins

24
Q

Which organelle in a cell would make enzymes

A

Ribosomes

Digestive System (3 decks)

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