Cycle One Practice MCQs

Question 1

The inner layer of the heart is called:

A. Pericardium
B. Endocardium
C. Myocardium
D. Epicardium
E. Vasa Vasorum

Answer 1

B

Question 2

The normal cardiac impulse propagation sequence is:
A) SA node, AV node, His-Purkinje, ventricle
B) AV node, His-Purkinje, ventricle, SA node
C) SA node, His-Purkinje, AV node, ventricle
D) AV node, SA node, His-Purkinje, ventricle
E) His-Purkinje, SA node, AV node, ventricle

Answer 2

A

Question 3

Which channel is responsible for repolarisation in ventricular cardiac myocytes?
A. Voltage gated sodium channel
B. HCN-gated channel (funny current)
C. Voltage gated potassium channel
D. Voltage gated calcium channel
E. Voltage gated chloride channel

Answer 3

C

Question 4

Using the Vaughan Williams system, class I antiarrhythmics:
A) block Na+ channels
B) reduce the slope of phase 2 (plateau phase)
C) prolong the effective refractory period (ERP)
D) only affect pacemaker cells of SA and AV node
E) none of the above

Answer 4

A

Question 5

Using the Vaughan Williams system, class III antiarrhythmics:
A) block Na+ channels
B) reduce the slope of phase 2 (plateau phase)
C) prolong the effective refractory period (ERP)
D) only affect pacemaker cells of SA and AV node
E) none of the above

Answer 5

C

Question 6

Pharmacological management of myocardial infarction could include:
A) ACE inhibitors
B) opioids
C) beta-adrenoceptor antagonists
D) thromobolytic drugs
E) all of the above

Answer 6

E

Question 7

An example of an Ca2+ antagonist is:
A. captopril
B. losartan
C. salbutamol
D. verapamil
E. atenolol

Question 8

Losartan is an example of a:
A. Ca2+ channel antagonist
B. Alpha blocker
C. ACE inhibitor
D. Loop diuretic
E. AT1 blocker