Q- Which one of the following muscle relaxants causes muscle fasciculations prior to muscle relaxation when administered?
A-Atracurium
B-Rocuronium
C-Succinylcholine
D-Vecuronium
C-Succinylcholine- It is a neuromuscular blocker. It initially stimulates nicotinic acetylcholine receptors causing fasciculations then depolarization block follows.
Q- Which of the following is the most common site of aneurysm in the circle of Willis and may cause aphasia and hemiparesis?
A-Anterior communicating artery
B-Middle cerebral artery
C-Ophthalmic artery
D-Posterior communicating artery
A-Anterior communicating artery- 85% of saccular brain aneurysms arise from circle of Willis. The most common location is anterior communicating artery (35%), internal carotid artery (30%) and other listed arteries (22%).
Q- Diastolic heart sounds include the murmur of which one of the following cardiac abnormalities?
A-Aortic stenosis
B-Mitral stenosis
C-Mitral regurgitation
D-Pulmonic stenosis
B-Mitral stenosis- Diastolic heart sounds include murmurs of mitral stenosis, aortic regurgitation and pulmonic regurgitation while systolic heart sounds include murmurs of aortic stenosis, pulmonic stenosis and mitral regurgitation.
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