MCQ's-UCMS

AIIMS may 05
Q. SA node acts as a pacemaker of the heart because of the fact that:
) is capable of generating impulses spontaneously
b) has rich sympathetic nerve innervations
c) has poor cholinergic innervations
d) generates impulses at the highest rate

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Pathology CNS
A 35-year-old man returns to the Bhairahawa after a recent trip to Kathmandu. A few days later, he develops altered consciousness and extreme irritability. All diagnostic investigations and supportive therapy are unsuccessful and the patient becomes comatose and dies. Autopsy reveals elongated eosinophilic intracytoplasmic inclusions within the pyramidal neurons of the hippocampus and Purkinje neurons of cerebellum. Which is the most likely diagnosis?
a. CMV Encephalitis
b. Herpes encephalitis
c. HIV Encephalitis
d. Lewy body disease
e. Rabies encephalitis

A 23-year-old male is rushed to the emergency room after being involved in a street fight. Physical examination reveals a stab wound at the left sternal border in the fourth intercostal space. Which of the following structures is most likely to have been damaged?

a. Pulmonary trunk

b. Right ventricle

c. Left atrium

d. Left ventricle

e. Inferior venacava

VIVA Biochemistry
A 58 year old man with known manic depression who was being treated with lithium, was admitted to a hospital psychiatric ward with a recent history of lethargy and confusion. On examination he was found to be very dehydrated, the results of biochemical investigations were:
................................ Plasma (mmol/L)..........Ref. Rang (mmol/L)
[Urea] ... 16.1 2.5-6.6
[Na+] 197 132-144
[K+] 3.6 3.3-4.7
[Glucose] 6.2

Urine Osmolality (mmol/kg) 209
What is the possible diagnosis?

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Q. Erythropoietin is secreted by.........

a) cells in Macula densa
b) cells in the Proximal tubules
c) juxtaglomerular cells
d) cells in Peritubular capillary bed

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Q) Oxygen delivery to the tissues would be reduced to the greatest extent in:
a)a patient with moderately severe metabolic acidosis
b)who has ingested cyanide
c)with carbon monoxide poisoning
d)a normal subject running marathon at sea level
e)breathing 100% oxygen at top of mount everest

Hi everyone , we being the students of UCMS would like to share the very important M.C.Q's with all of you, hope to get your response....... questions will be posted soon !!