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  • Question 1 - Pacemaker cells in the SA node and the AV node are connected by?...

    Incorrect

    • Pacemaker cells in the SA node and the AV node are connected by?

      Your Answer: P cells

      Correct Answer: Gap junctions

      Explanation:

      Gap junctions allows for rapid propagation of the action potential from one cell to the other. The cells of the heart are connected by gap junctions.

    • This question is part of the following fields:

      • Cardiovascular
      • Physiology
      2
      Seconds

  • Question 2 - Corticospinal tracts are located in the ___ of the white matter. ...

    Incorrect

    • Corticospinal tracts are located in the ___ of the white matter.

      Your Answer:

      Correct Answer: Anterior and lateral funiculi

      Explanation:

      The corticospinal tract is a descending or a motor tract which projects nerve fibers from the cortex of the cerebrum down to different levels of the spinal cord. The descending corticospinal tract descends from the origin, through the corona radiata, posterior half of the lateral ventricle, and enters the midbrain through the cerebral peduncle. In the medulla they form the medullary pyramids on either side of midline as lateral and anterior fibers.

    • This question is part of the following fields:

      • Neurology
      • Physiology
      0
      Seconds

  • Question 3 - Which of the following features do mast cells and basophils have in common:...

    Incorrect

    • Which of the following features do mast cells and basophils have in common:

      Your Answer:

      Correct Answer: Are essential for immediate type-hypersensitivity reactions

      Explanation:

      Anaphylaxis is a severe immediate allergic reaction of rapid onset affecting many body systems. It is due to the release of inflammatory mediators and cytokines from mast cells and basophils. Basophils are the least common of the granulocytes, representing about 0.5 to 1% of circulating white blood cells. However, they are the largest type of granulocyte. They are responsible for inflammatory reactions during immune response, as well as in the formation of acute and chronic allergic diseases, including anaphylaxis, asthma, atopic dermatitis and hay fever. They can perform phagocytosis (cell eating), produce histamine and serotonin that induce inflammation, and heparin that prevents blood clotting. Mast cells are similar in appearance and function. Both cell types store histamine, a chemical that is secreted by the cells when stimulated.

    • This question is part of the following fields:

      • Immunology
      • Physiology
      0
      Seconds

  • Question 4 - To which of the following plasma proteins is T4 most bound in plasma?...

    Incorrect

    • To which of the following plasma proteins is T4 most bound in plasma?

      Your Answer:

      Correct Answer: Thyroxine-binding globulin

      Explanation:

      Thyroxine-binding globulin, also known as TBG, is one of the three transport proteins responsible for carrying T4 and T3 through the circulatory system. It carries most of the T4 present in plasma, which it binds to strongly, shielding the hydrophobic hormones from the aqueous surroundings.

    • This question is part of the following fields:

      • Endocrinology
      • Physiology
      0
      Seconds

  • Question 5 - Which one of the following leads to decreased prolactin levels? ...

    Incorrect

    • Which one of the following leads to decreased prolactin levels?

      Your Answer:

      Correct Answer: Dopamine

      Explanation:

      Dopamine has an important effect on the regulation of prolactin secretion. Dopamine binds to type-2 dopamine receptors of the lactotroph cells that are functionally linked to membrane channels and G proteins and suppresses the high secretory activity of the pituitary lactotrophs.

    • This question is part of the following fields:

      • Endocrinology
      • Physiology
      0
      Seconds

  • Question 6 - The celiac trunk consists of which arteries? ...

    Incorrect

    • The celiac trunk consists of which arteries?

      Your Answer:

      Correct Answer: Left gastric, common hepatic, splenic

      Explanation:

      The celiac trunk is the first major branch of the abdominal aorta. It is 1.25 cm in length. Branching from the aorta at thoracic vertebra 12 (T12). There are three main divisions of the celiac artery:- left gastric artery- common hepatic artery- splenic artery

    • This question is part of the following fields:

      • Cardiovascular
      • Physiology
      0
      Seconds

  • Question 7 - Regarding the surface anatomy of the orifices of the heart, where is the...

    Incorrect

    • Regarding the surface anatomy of the orifices of the heart, where is the aortic valve located?

      Your Answer:

      Correct Answer: Opposite the left 3rd intercostal space to the left of the sternum

      Explanation:

      The aortic valve is situated in the left 3rd intercostal space just beneath the sternum.

    • This question is part of the following fields:

      • Cardiovascular
      • Physiology
      0
      Seconds

  • Question 8 - Concerning surface anatomy, where is the aortic valve found? ...

    Incorrect

    • Concerning surface anatomy, where is the aortic valve found?

      Your Answer:

      Correct Answer: Situated in the left third intercostal space underneath the sternum

      Explanation:

      The aortic valve is situated in the left 3rd intercostal space just beneath the sternum.

    • This question is part of the following fields:

      • Cardiovascular
      • Physiology
      0
      Seconds

  • Question 9 - Which of the following is not a feature of Liddle’s syndrome? ...

    Incorrect

    • Which of the following is not a feature of Liddle’s syndrome?

      Your Answer:

      Correct Answer: Autosomal recessive inheritance

      Explanation:

      Liddle’s syndrome is a rare autosomal dominant condition characterized by early, and frequently severe, high blood pressure associated with low plasma renin activity, metabolic alkalosis, low blood potassium, and normal to low levels of aldosterone. Liddle syndrome involves abnormal kidney function, with excess reabsorption of sodium and loss of potassium from the renal tubule, and is treated with a combination of low sodium diet and potassium-sparing diuretic drugs (e.g., amiloride).

    • This question is part of the following fields:

      • Endocrinology
      • Physiology
      0
      Seconds

  • Question 10 - Endothelial cells produce the following substance(s): ...

    Incorrect

    • Endothelial cells produce the following substance(s):

      Your Answer:

      Correct 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
      0
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Cardiovascular (0/1) 0%
Physiology (0/1) 0%
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