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Chemical Coordination and Integration Test 55

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Chemical Coordination and Integration Test 55
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  • Question 1
    1 / -0
    Which of the following radioactive isotopes is used in the detection of thyroid cancer?
    Solution
    Iodine-131 is also called as radioiodine. It is an important radioisotope of iodine. Iodine-131 is also one of the most commonly used gamma-emitting radioactive industrial tracer. Iodine is an important component of thyroxine hormone. So, thyroid gland takes the I-131, which is then incorporated into the thyroxine.
  • Question 2
    1 / -0
    Angiotensin is derived from plasma protein "angiotensinogen" by the action of renin and other nervous stimuli. Angiotensin stimulates which of the following?
    Solution
    Angiotensin is involved in regulating aldosterone and is the core regulator. Angiotensin II acts synergistically with potassium. The potassium feedback is inoperative when no angiotensin II is present.
  • Question 3
    1 / -0
    The hormones that initiate ejection of milk, stimulates milk production and growth of ovarian follicles are respectively known as 
    Solution
    Prolactin-releasing hormone (PRH) activates the anterior pituitary to initiate production and ejection of breast milk through the production of prolactin. Oxytocin along with prolactin hormone stimulates milk production. FSH (follicle stimulating hormone) stimulates the growth of ovarian follicles in the ovary before ovulation.
    Thus, the correct answer is option E.
  • Question 4
    1 / -0
    Hassall's bodies/corpuscles are present in
    Solution
    Hassall's corpuscles are spherical or ovoid bodies found in the medulla of the thymus, composed of concentric arrays of epithelial cells, which contain keratohyalin and bundles of cytoplasmic filaments. They help to induce CD-4 regulatory T cell development. 
  • Question 5
    1 / -0
    Daily rhythms are usually associated with
    Solution
    The pineal gland is a small endocrine gland in the vertebrate brain. It produces melatonin, a serotonin derived hormone, that affects the modulation of sleep patterns in both seasonal and circadian rhythms.
    So, the correct answer is 'Pineal'
  • Question 6
    1 / -0
    Adrenal cortex secretes androgen, it is known as
    Solution
    Androsterone is a weak androgen produced by the metabolism of certain hormones and found in the normal urine of both males and females. Androsterone is a steroid hormone with a weak androgenic activity that is synthesised from the adrenal hormone dehydroepiandrosterone by the enzyme steroid 5-reductase. 
    So, the correct answer is option B.
  • Question 7
    1 / -0
    Parathormone induces which of the following function?
    Solution
    • In presence of parathyroid hormone, bones will give up their calcium in an attempt to increase the blood level of calcium.  
    • Under the influence of parathyroid hormone, the bones will continue to release their calcium into the blood at a rate, which is too high, resulting in high blood calcium levels. 

    Thus, the correct answer is A. 
  • Question 8
    1 / -0
    Manifestation of masculinity pattern in females due to hormonal effects is known as
    Solution
    Virilization is a condition, that causes a female to develop male pattern hair growth and other masculine traits. Women with virilization often have an imbalance in the sex hormones estrogen and testosterone.
    So, the correct answer is option B.
  • Question 9
    1 / -0
    When mammary glands of male develop similar to that of female, then this condition is known as:
    Solution
    Gynaecomastia is enlargement of the male breast tissue. Oestrogen stimulates breast tissue growth, while androgens inhibit it. The important factor is the ratio of active androgens to oestrogens. The ratio can be altered as a result of reduced testosterone production/action or enhanced oestrogen production/action or both. 
  • Question 10
    1 / -0
    Insulin receptors are
    Solution
    The insulin receptor (IR) is a transmembrane receptor which is present in the extrinsic protein. It is activated by insulin, IGF-I, IGF-II and belongs to the large class of tyrosine kinase receptors. 
    So, the correct answer is option A.
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