- Aldosterone
- Luteinising hormone
- Somatostatin
- Thyroxine
Answer: Thyroxine
2. Which valve prevents the backwards flow of blood in to the left atrium?
- Mitral valve
- Aortic valve
- Pulmonary valve
- Tricuspid valve
Answer: Mitral valve
3.What sort of space exists between the parietal and visceral pericardium?
- Absolute
- Virtual
- Essential
- Virtuous
Answer: Virtual
4. The ‘p’ wave on the electrocardiogram corresponds to:
- Ventricular depolarisation
- Atrial depolarisation
- Atrial repolarisation
- Ventricular repolarisation
Answer: Atrial depolarisation
5. The Frank-Starling Law states:
- The greater the heart rate the higher the blood pressure.
- The amount of stretch the ventricle is subject to affects the force of contraction
- The amount of afterload affects the force of ventricular contraction
- Cardiac output equals stroke volume times heart rate.
Answer: The greater the heart rate the higher the blood pressure.
6. Gap junctions in the intercalated discs of cardiac muscle cells allow the rapid passage of what?
- Water
- Oxygen
- Calcium
- Action potentials
Answer: Action potentials
7. The cells of the cardiac conduction system have the ability to create their own action potentials, this is known as:
- Spontaneity
- Reflexivity
- Mechanicity
- Automaticity
Answer: Automaticity
8.The effect of adrenaline on the heart includes:
- Increased diastolic time
- Increased heart rate
- Increased systolic time
- Increased relaxation period
Answer: Increased heart rate
9. What effect does increased activity in the parasympathetic nervous system have on the heart:
- Increase force of contraction
- Increase heart rate
- Decrease heart rate
- Decrease force of contraction
Answer: Decrease heart rate
10. The parasympathetic nervous system innervates the heart via which cranial nerve?
- Cranial Nerve XII – Hypoglossal nerve
- Cranial nerve IV – Trochlear nerve
- Cranial nerve VI – Abducens nerve
- Cranial nerve X – Vagus nerve
Answer: Cranial nerve X – Vagus nerve