OCR GCSE PE Respiratory system

Where does gaseous exchange take place?

• Trachea

• Alveoli

• Bronchi

• Bronchioles

During inspiration

• the intercostal muscles contract and the diaphragm contacts

• The intercostal muscles contract and the diaphragm relaxes

• The intercostal muscles relax and the diaphragm relaxes

• The intercostal muscles relax and the diaphragm contracts

During expiration

• the intercostal muscles contract and the diaphragm contacts

• The intercostal muscles contract and the diaphragm relaxes

• The intercostal muscles relax and the diaphragm relaxes

• The intercostal muscles relax and the diaphragm contracts

Tidal volume is

• The volume of air inspired or expired per breath

• The number of breaths per minute

• the amount of air a person breaths in a minute

Minute ventilation is

• The volume of air inspired or expired per breath

• The number of breaths per minute

• the amount of air a person breaths in a minute

How do you calculate minute ventilation

• Minute ventilation = Tidal Volume/Respiratory Rate.

• Minute ventilation = Respiratory Rate/Tidal Volume

• Minute ventilation = Tidal Volume x Respiratory Rate.

The pathway of air is

• Nose, trachea, bronchioles, bronchi, alveoli

• Nose, trachea, bronchi, bronchioles, alveoli

• Nose, bronchi, bronchioles, trachea, alveoli

• Nose, alveoli, trachea, bronchioles, bronchi

What blood vessel does the oxygen and carbon dioxide diffuse through during gaseous exchange

• Vein

• Artery

• Capillaries

Oxygen combines with red blood cells to form

• Haemoglobin

• Oxyhaemoglobin

• White blood cells

• Carbon dioxide

The alveoli have a

• Large surface area

• Small surface area