Circulatory System

The heart is located just left of centre and

• anterior to (in front of) the sternum

• posterior to (behind) the sternum

• anterior to (in front of) the cranium

• posterior to (behind) the cranium

Which of the following is a function of the heart?

• To pump oxygen around the body

• To produce red blood cells

• To pump blood around the body

• To produce white blood cells

How many atria are there within the heart?

• 1

• 2

• 3

• 4

Which chamber of the heart is supplied de-oxygenated blood via the vena cava?

• Left ventricle

• Right ventricle

• Left atrium

• Right atrium

Through which blood vessel does the heart deliver de-oxygenated blood to the lungs?

• Pulmonary artery

• Aorta

• Superior vena cava

• Pulmonary vein

What type of muscle fibre forms the walls of blood vessels?

• Striated

• smooth

• skeletal

• cardiac

Systolic blood pressure is a measure of the force that blood exerts on the walls of the

• veins whilst the heart contracts

• veins whilst the heart relaxes

• arteries whilst the heart contracts

• arteries whilst the heart relaxes

According to the World Health Organisation (WHO) which of the following blood

pressure readings is classified as ‘normal’?

• 120/80

• 80/120

• 130/100

• 100/130

What is meant by stroke volume?

• The stage in the cardiac cycle during which the heart is relaxing

• The volume of blood pumped by the heart in one minute

• The stage in the cardiac cycle during which the heart is contracting

• The volume of blood pumped from the heart with each beat

Which two chambers of the heart are involved in the pulmonary circulation?

• Right ventricle and left atrium

• Left ventricle and left atrium

• Right ventricle and right atrium

• Left ventricle and right atrium