Question

37. A 15 years old boy is admitted to hospital with severe diarrhea.the following laboratory results are available sodium142 mEq/L, potassium 3.6 mEq/L,chlorine 115mEq/L,Bicarbonate 12mEq/L.Arterial blood gas reveals pH 7.15,Pco2 38,HCO3 12.urinalysis reveals no ketones.which of the following apply?

a. Metabolic acidosis is present

b. Anion gap is normal

c.he is not compensating

d.All of the above.

38.Approximate the amount of potassium in the ECFV of a 70kg man with serum potassium of 4.0mEq/L

a.45 mEq/L. b.505mEq/L c.55mEq/L. d.60mEq/L e.none of the above

50. you are evaluating an EKG and notice that the QRS complex is pointed down in Lead 1 and pointed up in AVF.which of the following represents the pathophysiology of the heart.

a. Right sided hypertrophy /left sided infraction

b.Left sided hypertrophy /Right sided infraction

c.hypertrophy on both side of the heart.

d.infraction on both side of the heart

e.None of the above

58.Your patient Ms.A has a history of coughing up blood, fever and weight loss and sweating at night.which condition best relates to the pathophysiology noted

a.Cancer

b.Tuberclosis

c.bronchitis

d.none of the above

Answer 1

Q no. 37

Metabolic acidosis is present because pH is less than 7. 4 and PCO2 is less than 40 that means it is not respiratory acidosis.

Also anion gap less than 20, 18.6.

38.

45 mEq/L

Intracellular potassium in 70 year old is 40 and 4

40+4 =44

Approximately 45 mEq/L

38.

58.

Fever, weight loss and night sweating plus hemoptysis are the symptoms of tuberculosis. Weight loss and bleeding can be the symptoms of lung cancer too but they are not usually associated with night sweating and fever.