Monitoring Week 1: Cardiovascular System

Question 1

What are the 3 valves of the heart?

Answer 1

• Tricuspid valve (right side)
• Bicuspid valve (left side)
• Semi-lunar valves (between the right and left ventricles + the pulmonary artery and aorta)

Question 2

What are the 4 blood vessels?

Answer 2

• Vena Cava (takes in deoxygenated blood to right atrium
• Pulmonary Vein (delivers deoxygenated blood to the left atrium)
• Pulmonary artery (takes deoxygenated blood to the lungs)
• Aorta (takes oxygenated blood to the body)

Question 3

What is the Cardiac Conduction System?

Answer 3

A group of cells in the wall of the heart that are responsible for the impulses that contract the heart

Question 4

What are the 3 receptors?

Answer 4

• Chemoreceptors (detect chemical changes)
• Baroreceptors (detect changes in blood pressure)
• Proprioceptors (provide information about movement and body position)

Question 5

What are the 3 nervous systems?

Answer 5

• Central Nervous System
• Sympathetic Nervous System (stimulates heart to beat faster)
• Parasympathetic Nervous System (resets heart back to rest)

Question 6

What is meant by the heart being myogenic?

Answer 6

The heart can create its own impulses

Question 7

What coordinates the CNS and the Peripheral Nervous System?

Answer 7

The cardiac control system in the medulla oblongata

Question 8

What is the order of the Cardiac Comduction System?

Answer 8

1. Electrical impulses generates in the sinoatrial node
2. The electrical impulse travels through the atria causing them to contract and pass blood
3. The atrioventricular node delays the impulse for 0.1s to allow all blood to be passed
4. The impulse travels down the bundle of HIS in the septum
5. The impulses reach the purkinje fibres around the ventricles, causing them to contract