USMLE: Medical Science MCQs (Practice-Test 97 of 135)

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  1. Which one of the following epidermal cells is of neural crest origin?

    1. Melanocyte

    2. Langerhan's cell

    3. Merkelcell

    4. Prickle cell

  2. Match List I (Osteon component) with List II (Contents) and select the correct answer.

    List-I List-II

    1. Lacunae

    2. Canaliculi

    3. Lamellae

    4. Harersian canals

    1. Blood vessels

    2. Osteocytes

    3. Osteocyte processes

    4. Collagen fibres

    • A
    • B
    • C
    • D
      • 2
      • 3
      • 1
      • 4
      • 3
      • 2
      • 4
      • 1
      • 2
      • 3
      • 4
      • 1
      • 3
      • 2
      • 1
      • 4

  3. Match List I (Abnormalities of the vertebral column) with list II (Their clinical features) and select the correct answer.

    List-I List-II

    1. Meningocelel

    2. Meningomyelecele

    3. Myelocele

    4. Spina bifida occulta

    1. Failure of dorsal portion of vertebra to fuse

    2. Menings along with spinal cord bulge through the defect

    3. Meninges bulge through the defects

    4. Neural tissue is exposed on surface

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 3
      • 4
      • 3
      • 2
      • 4
      • 1
      • 1
      • 3
      • 2
      • 4
      • 3
      • 4
      • 2
      • 1

  4. There is a clear-cut indication for exploratory laparotomy in blunt abdominal trauma if the peritoneal lavage luid show

    1. 10 to 50 RBC/microlitre

    2. 10 to 50.000 RBC/microlitre

    3. 50.000 to 1, 00, 000 RBC/microlitre

    4. above 1, 00, 000 RBC/microlitre

  5. Consider the following statements: In estimating the fluid requirements after burns

    1. the Rule of Nine is a valuable guide in adults.

    2. depth of burns is taken into consideration.

    3. the calculated requirement should be modified depending upon the hourly urinary output.

    Of the statements

    1. 1, 2 and 3 are correct

    2. 1 and 3 are correct

    3. 1 and 2 are correct

    4. 2 and 3 are correct

  6. All of the following are indications for ventilatory support in patients with head injury except

    1. PaO2 less than 70 mm Hg

    2. PaCO2 more than 45 mm Hg

    3. PaO2 saturation less than 90%

    4. PaCO2 less than 35 mm Hg

  7. Consider the following statements: In the treatment of compound fractures

    1. when open reduction is performed, it is important to evacuate the fracture haematoma and strip the periosteum as it may serve as nidus for infection.

    2. internal fixation may be done for fractures that are compound from within.

    3. suitable external fixation and delayed primary closure is recommended for fractures that are compound from without:

    4. delayed primary closure of wound is not necessary provided that broad spectrum antibiotics are used.

    Of these statements

    1. 1 and 2 are correct

    2. 1, 2 and 3 are correct

    3. 1, 3 and 4 are correct

    4. 2 and 3 are correct

  8. All of the following are true of leimyosarcoma of the stomach except

    1. Histologicaldiagnosis is easily obtained b endoscopic biopsy

    2. They are asymptomatic until they become very large

    3. They commonly present with pain and occult or massive haemorrhage

    4. They arise more commonly from the proximal stomach

  9. Consider the following statements: In carcinoma of the stomach

    1. a fixed abdominal lump indicates inoperability.

    2. radiotherapy offers a good chance of cure.

    3. in advanced disease, palliative resection is better than palliative bypass operation.

      1. 1, 2 and 3 are correct

      2. 1 and 2 are correct

      3. 2 and 3 are correct

      4. 1 and 3 are correct

  10. Treatment of fracture neck (intracapsular) of femur in a 45-year old man is

    1. Conservative. P. O P spica

    2. Total hip replacement arthroplasty

    3. Hemi-arthroplasty

    4. Internal fixation of the fracture

  11. Central venous pressure is

    1. a measure of the circulatory volume

    2. a measure of adequacy or myocardial function

    3. more informative than pulmonary capillary wedge pressure

    4. raised in septic shock

  12. All of the following are true of pulmonary erabolism except

    1. Sudden onset of pleuritic pain and hamoptysis and hypotension

    2. ECG shows evidence of acute left ventricular stress

    3. Blood LDH and SGOT levels are raised

    4. Isotope perfusion ventilation scan is diagnostic

  13. Which of the following are true of lumbar sympathectomy?

    1. It often results in the healing of ischaemic ulcers.

    2. It improves skin nutrition.

    3. It opens up the occluded blood vessels.

    4. It relieves pain.

    Select the correct answer

    1. 1, 2 and 3

    2. 1, 3 and 4

    3. 1, 2 and 4

    4. 2, 3 and 4

  14. A large collection of pus in the true peivis after rupture of acute appendicitis is best drained

    1. transvaginally

    2. trans-rectally

    3. supra-publically

    4. laparotomy

  15. Anastomotic leaks are more comon in the large bowel because of all of the following reasons except

    1. The colon is prone to guseous distension

    2. The contents of the colon are infected and semisolid

    3. The blood supply of colon is poorer than that of the small bowel and stomach

    4. Massive colonic peristalsis distrupt the anastomosis

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