xpress test

1.

1 point

Which of the following statements about venous thrombosis and pulmonary embolism is FALSE?

Most pulmonary emboli arise in lower extremities.

Most pulmonary emboli result in pulmonary infarction

Deep vein thrombosis is associated with venous stasis

Large pulmonary emboli can cause sudden death.

2.

1 point

28 year old tall statured male with long tapering fingers with bilateral subluxation of lens presented with excruciating chest pain radiating to the back and moving downwards. CT chest revealed evidence of hemopericardium. The likeliest pathology underlying this disorder is:

Atheromatous plaque in aorta

Cystic medial degeneration of aorta

Obliterative endarteritis of aorta

Coronary artery thrombosis

3.

1 point

Which of the following is not mediated by apoptosis?

destruction of immune cells by the administration of steroids

follicular artesia of ovary following menopause

myocardial infarction following thrombosis of coronary artery

reperfusion injury to ischemic myocardium

4.

1 point

Which of the following mediator is secreted by activated T cells or NK cells that cause activation of macrophages?

Alpha interferon

Gamma interferon

TNF alpha

IL-2

5.

1 point

Which is the most common endocrinopathy associated with pituitary adenoma?

hypersecretion of TSH.

hypersecretion of prolactin

hypersecretion of ACTH

hypersecretion of GH

6.

1 point

A five year old male child has a history of recurrent bacterial respiratory infections. A fraternal female twin has developed normally. A maternal uncle died of pneumonia at age 2. Lab studies show nearly absent IgG and no circulating B lymphocytes. What is the expected histological picture in lymphnode biopsy?

multiple granulomas

lack of germinal centers

diffuse increase in plasma cells

Selective hyperplasia of mantle zone

7.

1 point

Which of the following is NOT an X linked recessive disorder?

Diabetes insipidus

Duchene muscular dystrophy

Chronic granulomatous disease

Friedreich ataxia

8.

1 point

The method of liver injury in HBV infection is:

Intracellular replication.

Host immune attack on the infected cells

Cellular transformation

Release of toxins

9.

1 point

A 30 year old female is on high doses of aspirin to control her rheumatoid arthritis. She takes ranitidine and antacids to alleviate gastritis pain. She underwent extraction of her impacted wisdom tooth which was followed by severe bleeding. She had no previous bleeding disorder earlier. The most likely cause of bleeding in this patient is:

late onset hemophilia

inhibition of thrombaxane synthesis by aspirin

ranitidine induced thrombocytopenia

antacid induced deficiency of vitamin K

10.

1 point

Which of the following organism that causes diarrhea is not associated with faecal leucocytosis?

Salmonella typhi

B.shigella sonnei.

Vibrio cholerae

EH E.coli