• Amused
  • Angry
  • Annoyed
  • Awesome
  • Bemused
  • Cocky
  • Cool
  • Crazy
  • Crying
  • Depressed
  • Down
  • Drunk
  • Embarrased
  • Enraged
  • Friendly
  • Geeky
  • Godly
  • Happy
  • Hateful
  • Hungry
  • Innocent
  • Meh
  • Piratey
  • Poorly
  • Sad
  • Secret
  • Shy
  • Sneaky
  • Tired
  • Wtf
  • Page 7 of 15 FirstFirst ... 56789 ... LastLast
    Results 61 to 70 of 150

    Thread: MCQ's With Explanations

    1. #61
      trimurtulu is offline MedicalGeek Resident
      This user has no status.
       
      I am:
      ----
       
      Join Date
      Aug 2008
      Posts
      6,606
      Downloads
      0
      Uploads
      0
      Rep Power
      40

      Arrow A54-year-old man with a chronic cough has a squamous cell carcinoma diagnosed in his right lung.


      Case Report:


      A54-year-old man with a chronic cough has a squamous cell carcinoma diagnosed in his right lung. While performing a pneumonectomy, the thoracic surgeon notes that the hilar lymph nodes are small, 0.5 to 1.0 cm in size, and jet black in color throughout.

      Which of the following is the most likely cause for this appearance to the hilar nodes?



      A Anthracotic pigmentation

      B Lipochrome deposition

      C Accumulation of melanin

      D Hemosiderosis

      E Metastatic carcinoma

      Answer / Explanation:

      [HIDE]
      (A) CORRECT.
      The black color comes from carbon pigments inhaled over the years, engulfed by macrophages, and sent via lymphatics to the nodes. It looks bad but does not compromise lung function.[/HIDE]
      .

    2. #62
      trimurtulu is offline MedicalGeek Resident
      This user has no status.
       
      I am:
      ----
       
      Join Date
      Aug 2008
      Posts
      6,606
      Downloads
      0
      Uploads
      0
      Rep Power
      40

      Arrow A 50-year-old woman with a history of unstable angina suffers an acute myocardial infarction. Thromb


      Case Report:


      A 50-year-old woman with a history of unstable angina suffers an acute myocardial infarction. Thrombolytic therapy with tissue plasminogen activator (tPA) is administered to restore coronary blood flow early in the course of this myocardial infarction.

      In spite of this therapy, the degree of myocardial fiber injury may increase because of which of the following cellular abnormalities?



      A Cytoskeletal intermediate filament loss

      B A decreased intracellular pH from anaerobic glycolysis

      C An increase in toxic oxygen radicals

      D Mitochondrial swelling

      E Nuclear chromatin clumping and decreased protein synthesis

      Answer / Explanation:

      [HIDE]
      (C) CORRECT.
      Such toxic oxygen radicals are released from neutrophils when blood flow is restored following ischemia.[/HIDE]
      .

    3. #63
      trimurtulu is offline MedicalGeek Resident
      This user has no status.
       
      I am:
      ----
       
      Join Date
      Aug 2008
      Posts
      6,606
      Downloads
      0
      Uploads
      0
      Rep Power
      40

      Arrow A 12-year-old boy has had multiple episodes of ear pain accompanied by fever. On examination his rig


      Case Report:


      A 12-year-old boy has had multiple episodes of ear pain accompanied by fever. On examination his right tympanic membrane is red and bulging. Laboratory studies show culture positive for Hemophilus influenzae. A year later he has conductive hearing loss on the right, and a head CT scan shows a mass in the right middle ear.

      Which of the following materials is most likely to be seen in the tissue curetted from his middle ear?




      A Lipofuscin

      B Russell bodies

      C Neutrophils

      D Cholesterol crystals

      E Anthracotic pigment


      Answer / Explanation:

      [HIDE]
      (D) CORRECT.
      The lipid from the red cell membranes is broken down and cholesterol crystals form. The boy has the complication of otitis media known as a cholesteatoma.[/HIDE]
      .

    4. #64
      trimurtulu is offline MedicalGeek Resident
      This user has no status.
       
      I am:
      ----
       
      Join Date
      Aug 2008
      Posts
      6,606
      Downloads
      0
      Uploads
      0
      Rep Power
      40

      Arrow A 43-year-old man has complained of mild burning substernal or epigastric pain following meals for t


      Case Report:


      A 43-year-old man has complained of mild burning substernal or epigastric pain following meals for the past 3 years. Upper GI endoscopy is performed and biopsies are taken of an erythematous area of the lower esophageal mucosa 3 cm above the gastroesophageal junction. There is no mass lesion, no ulceration, and no hemorrhage noted.
      .

      The biopsies demonstrate the presence of columnar epithelium with goblet cells. Which of the following mucosal alterations is most likely represented by these findings?



      A Dysplasia

      B Hyperplasia

      C Carcinoma

      D Ischemia

      E Metaplasia


      Answer / Explanation:

      [HIDE]
      (E) CORRECT.
      Metaplasia is the substitution of one tissue normally found at a site for another. The epithelium undergoes metaplasia in response to the ongoing inflammation from reflux of gastric contents. It is common in the lower esophagus with gastroesophageal reflux disease (GERD).[/HIDE]
      .

    5. #65
      trimurtulu is offline MedicalGeek Resident
      This user has no status.
       
      I am:
      ----
       
      Join Date
      Aug 2008
      Posts
      6,606
      Downloads
      0
      Uploads
      0
      Rep Power
      40

      Arrow A 59-year-old woman had the loss of consciousness that persisted for over an hour. When she became a


      Case Report:

      A 59-year-old woman had the loss of consciousness that persisted for over an hour. When she became arousable, she could not speak and she could not move her right arm or leg. A cerebral angiogram revealed an occlusion to her left middle cerebral artery. Months later, a computed tomographic (CT) scan shows a large 5 cm cystic area in her left parietal lobe cortex.
      This CT finding most likely demonstrates a lesion that is the consequence of resolution from which of the following events?


      A Liquefactive necrosis

      B Atrophy

      C Coagulative necrosis

      D Caseous necrosis

      E Apoptosis


      Answer / Explanation:

      [HIDE]
      (A) CORRECT.
      The brain undergoes liquefactive necrosis with infarction. As it resolves, a cystic area forms in the region of infarction.[/HIDE]
      .

    6. #66
      trimurtulu is offline MedicalGeek Resident
      This user has no status.
       
      I am:
      ----
       
      Join Date
      Aug 2008
      Posts
      6,606
      Downloads
      0
      Uploads
      0
      Rep Power
      40

      Arrow A 19-year-old woman gives birth to her first child. She begins breast feeding the infant. She contin


      Case Report:

      A 19-year-old woman gives birth to her first child. She begins breast feeding the infant. She continues breast feeding for almost a year with no difficulties and no complications.
      Which of the following cellular processes that occurred in the breast during pregnancy allowed her to nurse the infant for this period of time?


      A Stromal hypertrophy

      B Epithelial dysplasia

      C Steatocyte atrophy

      D Ductal epithelial metaplasia

      E Lobular hyperplasia


      Answer / Explanation:

      [HIDE]
      (E) CORRECT.
      There is an increase in lobules under hormonal influence to provide for lactation.[/HIDE]
      .

    7. #67
      trimurtulu is offline MedicalGeek Resident
      This user has no status.
       
      I am:
      ----
       
      Join Date
      Aug 2008
      Posts
      6,606
      Downloads
      0
      Uploads
      0
      Rep Power
      40

      Arrow In an experiment, a series of immunohistochemical stains are employed to identify different cellular


      Case Report:

      In an experiment, a series of immunohistochemical stains are employed to identify different cellular components. One particular stain identifies the presence of intermediate filaments within cells.
      This cytokeratin stain is most likely to be useful for which of the following diagnostic purposes?


      A Cytoskeletal alterations are seen with impending cell death

      B A neoplasm can be determined to be a carcinoma

      C Contractile properties of the cells can be determined

      D A history of chronic alcoholism can be confirmed

      E The degree of metaplasia or dysplasia can be assessed


      Answer / Explanation:

      [HIDE]
      (B) CORRECT.
      Carcinomas contain cytokeratins while sarcomas contain vimentin.[/HIDE]
      .

    8. #68
      trimurtulu is offline MedicalGeek Resident
      This user has no status.
       
      I am:
      ----
       
      Join Date
      Aug 2008
      Posts
      6,606
      Downloads
      0
      Uploads
      0
      Rep Power
      40

      Arrow A 20-year-old woman had Goodpasture syndrome which progressed to chronic renal failure. She was 165


      Case Report:

      A 20-year-old woman had Goodpasture syndrome which progressed to chronic renal failure. She was 165 cm tall and weighed 55 kg. She had blood pressure measurements in the range of 150/90 to 180/110 mm Hg, but she did not regularly take medications. Laboratory studies showed her blood urea nitrogen was over 100 mg/dL. She required chronic dialysis. She died from heart failure.
      At autopsy, her heart weighed 540 gm. The size of her heart is most likely to be the result of which of the following processes involving the myocardial fibers?


      A Hypertrophy

      B Fatty infiltration

      C Hyperplasia

      D Fatty degeneration

      E Edema


      Answer / Explanation:

      [HIDE]
      (A) CORRECT.
      The pressure load of hypertension led to myocardial fiber hypertrophy and a heart twice normal size.[/HIDE]
      .

    9. #69
      trimurtulu is offline MedicalGeek Resident
      This user has no status.
       
      I am:
      ----
       
      Join Date
      Aug 2008
      Posts
      6,606
      Downloads
      0
      Uploads
      0
      Rep Power
      40

      Arrow A 29-year-old man goes on a snorkeling trip to Looe Key Marine Sanctuary and later spends time on th


      Case Report:

      A 29-year-old man goes on a snorkeling trip to Looe Key Marine Sanctuary and later spends time on the beach at Bahia Honda State Park. The next day he has a darker complexion. His skin does not show warmth, erythema, or tenderness. His skin tone fades to its original appearance within a month.
      Which of the following substances contributes the most to the biochemical process leading to these skin changes?


      A Heme

      B Lipofuscin

      C Tyrosine

      D Homogentisic acid

      E Glycogen

      Answer / Explanation:

      [HIDE]
      (C) CORRECT.
      The tanning process in skin is stimulated by ultraviolet light exposure. Melanocytes have the enzyme tyrosinase to oxidize tyrosine to dihydroxyphenylalanine in the pathway for melanin production.[/HIDE]
      .

    10. #70
      trimurtulu is offline MedicalGeek Resident
      This user has no status.
       
      I am:
      ----
       
      Join Date
      Aug 2008
      Posts
      6,606
      Downloads
      0
      Uploads
      0
      Rep Power
      40

      Arrow A 17-year-old adolescent receives whole body radiation as part of a preparatory regimen for bone mar


      Case Report:

      A 17-year-old adolescent receives whole body radiation as part of a preparatory regimen for bone marrow transplantation to treat acute lymphocytic leukemia.
      Which of the following cells and tissues in the body is most likely to remain unaltered by the effects of this therapeutic radiation?


      A Ovarian follicles

      B Small intestinal epithelium

      C Erythropoietic cells of bone marrow

      D Spermatogonia of testicular tubules

      E Neurons of cerebral cortex

      Answer / Explanation:

      [HIDE]
      (E) CORRECT.
      These cells do not actively divide or proliferate.[/HIDE]
      .

    Page 7 of 15 FirstFirst ... 56789 ... LastLast

    Thread Information

    Users Browsing this Thread

    There are currently 1 users browsing this thread. (0 members and 1 guests)

    Similar Threads

    1. GRE_Sample Questions with Explanations
      By coolluck in forum GRE/TOFEL
      Replies: 6
      Last Post: 06-12-2013, 04:50 PM
    2. MCI (FMGE) Test Sept. 2008 Solved Question Paper with Explanations
      By trimurtulu in forum Indian Post Graduate Exams
      Replies: 13
      Last Post: 11-07-2010, 12:53 AM
    3. USMLE MCQ'S With explanations
      By PreDator in forum USMLE-MRCP Stuffs,Notes & Papers-Mcqs
      Replies: 25
      Last Post: 08-20-2009, 12:08 PM
    4. MCI (FMGE) Test Sept. 2008 Solved Question Paper with Explanations
      By trimurtulu in forum Indian Post Graduate Exams
      Replies: 1
      Last Post: 11-17-2008, 07:45 AM
    5. MCQ's
      By puravida13 in forum Miscellaneous
      Replies: 3
      Last Post: 01-30-2008, 08:07 AM

    Bookmarks

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •