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  • Question 1 - Endothelial cells produce the following substance(s): ...

    Correct

    • Endothelial cells produce the following substance(s):

      Your Answer: All of the above

      Explanation:

      Endothelial cells produce thromboxane, prostacyclins, nitric oxides, endothelins, IL-1 and TNF.

    • This question is part of the following fields:

      • Cardiovascular
      • Physiology
      9.9
      Seconds

  • Question 2 - The largest energy reserves among both lean and obese subjects are from ...

    Incorrect

    • The largest energy reserves among both lean and obese subjects are from

      Your Answer: Carbohydrates

      Correct Answer: Fatty acids

      Explanation:

      The energy required for sustained exercise is provided by the oxidation of two fuels, glucose stored as glycogen in the liver and muscle, and long-chain fatty acids, stored as adipose tissue triglycerides. The latter provides the largest energy reserve in the body.

    • This question is part of the following fields:

      • Metabolism
      • Physiology
      9.5
      Seconds

  • Question 3 - Select the correct statement about the microanatomy of the thyroid gland. ...

    Incorrect

    • Select the correct statement about the microanatomy of the thyroid gland.

      Your Answer: The individual thyroid cells rest on the capillary basal lamin

      Correct Answer: The capillaries adjacent to thyroid cells have a fenestrated endothelium.

      Explanation:

      Fenestrated capillaries have a very thin endothelium, which is perforated by numerous fenestrations or pores. Hormones are usually released into these capillaries, reaching their target cells through the circulatory system.

    • This question is part of the following fields:

      • Endocrinology
      • Physiology
      19.2
      Seconds

  • Question 4 - Which of the following conditions is NOT X-linked recessive? ...

    Incorrect

    • Which of the following conditions is NOT X-linked recessive?

      Your Answer: Duchenne muscular dystrophy

      Correct Answer: Cystic fibrosis

      Explanation:

      Cystic fibrosis is a autosomal recessive disease with an incidence of about 1 in 2500 live births. The most common mutation occurs in the long arm of chromosome 7 which codes for the chloride channel (cystic fibrosis transmembrane conductance regulator) gene.

    • This question is part of the following fields:

      • Genetics
      • Physiology
      18.1
      Seconds

  • Question 5 - The enzyme responsible for telomeres maintaining their length after cell division is called:...

    Correct

    • The enzyme responsible for telomeres maintaining their length after cell division is called:

      Your Answer: Telomerase reverse transcriptase

      Explanation:

      Telomerase is a reverse transcriptase that uses the RNA template to synthesize DNA in the 5′-3′ direction resulting in extension of the already 3′ end and then translocates it to the newly synthesized end. The GT rich strand is thus elongated.

    • This question is part of the following fields:

      • Genetics
      • Physiology
      5.7
      Seconds

  • Question 6 - All of the following are Vitamin K-dependent clotting factors except: ...

    Incorrect

    • All of the following are Vitamin K-dependent clotting factors except:

      Your Answer: Factor III

      Correct Answer: Factor XI

      Explanation:

      Activated vitamin K is used to gamma carboxylate (and thus activate) certain enzymes involved in coagulation: Factors II, VII, IX, X, and protein C and protein S. Inability to activate the clotting cascade via these factors leads to the bleeding symptoms

    • This question is part of the following fields:

      • Haematology
      • Physiology
      6.4
      Seconds

  • Question 7 - Bone marrow barrier is important to: ...

    Incorrect

    • Bone marrow barrier is important to:

      Your Answer: All of the above

      Correct Answer: Allow mature red blood cells to pass into circulation

      Explanation:

      The blood vessels of the bone marrow constitute a barrier, inhibiting immature blood cells from leaving the marrow. Only mature blood cells contain the membrane proteins, such as aquaporin and glycophorin, that are required to attach to and pass the blood vessel endothelium.

    • This question is part of the following fields:

      • Haematology
      • Physiology
      13.2
      Seconds

  • Question 8 - Which enzyme deficiency causes pellagra? ...

    Correct

    • Which enzyme deficiency causes pellagra?

      Your Answer: Niacin

      Explanation:

      Pellagra is a vitamin deficiency disease most frequently caused by a chronic lack of niacin (vitamin B3) in the diet.

    • This question is part of the following fields:

      • Haematology
      • Physiology
      6.7
      Seconds

  • Question 9 - What is the function of the acute phase protein, C-reactive protein? ...

    Incorrect

    • What is the function of the acute phase protein, C-reactive protein?

      Your Answer: Activates complement

      Correct Answer: Opsonises bacteria

      Explanation:

      There are various immune reactions that become activated once the barrier between the body and environment has been compromised. There are certain opsonins that bind to the bacteria and facilitate phagocytosis. One of them is the acute phase protein: C protein. others include antibodies and complement.

    • This question is part of the following fields:

      • Immunology
      • Physiology
      20.4
      Seconds

  • Question 10 - Angina pectoris develops when the flow through the coronary artery becomes: ...

    Correct

    • Angina pectoris develops when the flow through the coronary artery becomes:

      Your Answer: Oxygen deficient

      Explanation:

      Angina pectoris develops when stenosis ( >70%) of the artery occurs as a result of formation of an atherosclerotic plaque. This leads to a decrease in the O2 carried to the thickened heart muscle by the blood, leading to the characteristic chest pain associated with angina pectoris.

    • This question is part of the following fields:

      • Cardiovascular
      • Physiology
      12.3
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Cardiovascular (2/2) 100%
Physiology (4/10) 40%
Metabolism (0/1) 0%
Endocrinology (0/1) 0%
Genetics (1/2) 50%
Haematology (1/3) 33%
Immunology (0/1) 0%
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