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Year 9 Biology > Breathing And Gas Exchange > Flashcards

Breathing And Gas Exchange Flashcards

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1
Q

What are the two parts that breathing can be divided into?

A
  • Ventilation

- gas exchange

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2
Q

What is ventilation?

A

Getting air into and out of lungs

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3
Q

What is gas exchange?

A

How gases move into or out of bloodstream - waste gases removed and oxygen absorbed

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4
Q

What is ventilation in humans?

A

Movement of air through nose or mouth, down trachea, through bronchi/bronchioles and into alveoli of lungs

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5
Q

What does ventilation consist of?

A

Inhaling and exhaling

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6
Q

What is inhaling?

A

Breathing in

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7
Q

What is exhaling?

A

Breathing out

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8
Q

Whats the first thing that happens when you inhale?

A

Diaphragm contracts and flattens

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9
Q

Whats the second thing that happens when you inhale?

A

Intercostal muscles contract

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10
Q

Whats the third thing that happens when you inhale?

A

Ribs move up and out

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11
Q

Whats the fourth thing that happens when you inhale?

A

Volume in chest cavity increases

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12
Q

Whats the fifth thing that happens when you inhale?

A

Air pressure inside chest cavity and therefore lungs decrease below atmospheric air pressure

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13
Q

Whats the sixth and final thing that happens when you inhale?

A

Air rushes in from higher pressure outside mouth into area of lower pressure in lungs

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14
Q

Whats the first thing that happens when you exhale?

A

Diaphragm relaxes and domes back into original position

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15
Q

Whats the second thing that happens when you exhale?

A

Intercostal muscles relax

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16
Q

Whats the third thing that happens when you exhale?

A

Ribs move down and in

17
Q

Whats the fourth thing that happens when you exhale?

A

Volume of chest cavity decreases

18
Q

Whats the fifth thing that happens when you exhale?

A

Air pressure inside chest cavity and therefore lungs increase above atmospheric air pressure

19
Q

Whats the sixth and final thing that happens when you exhale?

A

Air rushes out from high pressure inside mouth into area of lower pressure In air around us

20
Q

How many parts can breathing be divided into?

A

2

Year 9 Biology (11 decks)

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