Calcium And Phosphorus Metabolism Knowledge Test

36 Questions | Total Attempts: 66

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Calcium And Phosphorus Metabolism Knowledge Test

Calcium and phosphate are critical to human physiology, such as neuromuscular function, and are also needed for bone mineralization. What else do you know about the role of CA and P metabolism in our body? Let's test your knowledge with this test


Questions and Answers
  • 1. 
    Makes up bone mineral and the matrix of teeth and gives bones and teeth their rigidity
    • A. 

      Hydroxyapatite

    • B. 

      Ca

    • C. 

      Phosphorous 

    • D. 

      None of the above

  • 2. 
    Ca is needed for the direct activation of all the following enzymes except
    • A. 

      CPK

    • B. 

      Pancreatic lipase

    • C. 

      ATPase

    • D. 

      Succinate dehydrogenase

  • 3. 
    Ca plays a vital role in all of the three coagulation pathways where it is referred to as 
    • A. 

      Factor vi

    • B. 

      Factor iv

    • C. 

      Factor v

    • D. 

      Factor III

  • 4. 
    Ca interacts with which of the following  to trigger muscle contraction
    • A. 

      Actin & myosin

    • B. 

      TROPONIN C

    • C. 

      TROPONIN T

    • D. 

      TROPONIN I

  • 5. 
    Ca- Calmodulin complex activates which of the following enzymes
    • A. 

      Ca dependent protein kinases

    • B. 

      Adenylate cyclase

    • C. 

      A only 

    • D. 

      Both a and b

  • 6. 
    ADH acts through cAMP & then Ca
    • A. 

      True

    • B. 

      False

  • 7. 
    What are the three principal hormones that regulate Calcium?
    • A. 

      Calcitriol

    • B. 

      PTH

    • C. 

      Calcitonin

    • D. 

      All the above

  • 8. 
    Ca activates ATPase, increases the interaction btw actin & myosin
    • A. 

      True

    • B. 

      False

  • 9. 
    ALL of the following Factors promoting Ca absorption except
    • A. 

      Phytates & oxalates

    • B. 

      Parathyroid hormone

    • C. 

      Acidity and Lactose

    • D. 

      Lysine & arginine

    • E. 

      Vitamin D via calcitriol (active form)

  • 10. 
    All of the following Factors inhibits Ca absorption except
    • A. 

      High content of dietary phosphate

    • B. 

      The dietary ratio of Ca & P

    • C. 

      Alkaline condition

    • D. 

      High content of dietary fiber

    • E. 

      Phytates & oxalates

    • F. 

      Parathyroid hormone

  • 11. 
    Normal conc. of plasma or serum Calcium is
    • A. 

      9- 11 mg/dl (4.5 – 5.5 mEq/l)

    • B. 

      10- 11 mg/dl (4.5 – 5.5 mEq/l)

    • C. 

      7- 11 mg/dl (4.5 – 5.5 mEq/l)

    • D. 

      None of the above

  • 12. 
    Calcitriol, PTH & calcitonin ~ regulate plasma Ca within a narrow range
    • A. 

      True

    • B. 

      False

  • 13. 
    What is the net effect of an increase in PTH on the bone, intestine, and kidneys
    • A. 

      Increased plasma calcium

    • B. 

      Decreased plasma calcium

  • 14. 
    What is responsible for bone resorption
    • A. 

      Osteoclasts

    • B. 

      Osteoblasts (bone formation)

  • 15. 
    What is responsible for bone mineralization
    • A. 

      Osteoclasts

    • B. 

      Osteoblasts (bone formation)

  • 16. 
    Low serum calcium causes a _______ in 1,25-dihydroxy Vitamin D3 (Calcitriol)
    • A. 

      Increase

    • B. 

      Decrease

  • 17. 
    Low serum calcium causes a _________ in calcitonin
    • A. 

      Decrease

    • B. 

      Increase

  • 18. 
    Stimulates Ca uptake by osteoblasts of bone & promotes calcification or mineralization
    • A. 

      Calcitriol

    • B. 

      PTH

  • 19. 
    Causes decalcification or demineralization of bone carries out by OSTEOCLAST
    • A. 

      Calcitriol

    • B. 

      PTH

  • 20. 
    Abnormalities in Ca metabolism are mainly associated with alterations in
    • A. 

      Calcitonin

    • B. 

      PTH

    • C. 

      Calcitriol

  • 21. 
    Diseases associated with atherosclerosis include all the following except
    • A. 

      Diabetes mellitus

    • B. 

      Hyperthroidism

    • C. 

      Nephrotic syndrome

    • D. 

      Hypothyroidism

    • E. 

      Hyperlipoproteinemias

  • 22. 
    Which is not a risk factor for atherosclerosis? 
    • A. 

      High consumption of saturated fat

    • B. 

      Diabetes

    • C. 

      Smoking

    • D. 

      High consumption of unsaturated fat

    • E. 

      Obesity

  • 23. 
    Women have higher HDL; less prone to heart diseases compared to men
    • A. 

      True

    • B. 

      False

  • 24. 
    Which one of the following is not a complication of atherosclerosis? 
    • A. 

      Myocardial infarction

    • B. 

      Aortic aneurysms

    • C. 

      Heart failure

    • D. 

      Stroke

  • 25. 
    The process of atherosclerotic plaque formation progresses slowly with the involvement of
    • A. 

      Lymphocytes

    • B. 

      Monocytes

    • C. 

      Macrophages

    • D. 

      Smooth muscle cells

    • E. 

      All the above

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