3.1.1.2 The structure and functions of the cardio-respirator

The pathway of air starts with the nose/mouth then the trachea then ...

• Left atrium

• Bronchioles

• Alveoli

• Bronchi

• Cillia

Large surface area of the alveoli is one of the features that assist gaseous exchange. which of the following is also true?

• moist thin walls (one cell thick)

• movement of gas from high concentration to low concentration

• lots of capillaries

• Lots of veins

• Haemoglobin

When oxygen combines with haemoglobin it then forms ...

• Haemoglobin - oxydised

• Haemoglobin sulfur

• Oxyhaemoglobin

• Haemoglobin - dioxide

How many blood vessels are there?

• 1

• 2

• 3

• 4

Which blood vessel carries oxygen rich blood?

• Veins

• Capillaries

• Arteries

What does vasodilation mean?

• Blood vessels widening

• Blood vessels reducing in size

• Blood vessels reducing their viscosity

The heart has how many chambers?

• 1

• 2

• 3

• 4

Oxygenated blood enters which chamber of the heart?

• Left atrium

• Right atrium

• left ventricle

• Right ventricle

Cardiac output is ...

• The amount of blood produced by the bone marrow

• The amount of blood within the human body

• The amount of blood the heart can carry

• The amount of blood ejected from the heart in one minute

What causes inhalation and exhalation?

• Exercise commencing

• Changes in air pressure

• Tidal volume

• Residual volume