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Chemical Coordination and Integration Test 12

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Chemical Coordination and Integration Test 12
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  • Question 1
    1 / -0
    Mammals born without a Thymus gland fail to manufacture ____.
  • Question 2
    1 / -0
    Both organs of which set secretes hormones?
    Solution
    The main hormone secreted by the testes is testosterone, an androgenic hormone. The placenta is an endocrine gland, that is only present during pregnancy. It secretes human chorionic gonadotrophin hormone (hCG), which is present only during pregnancy.
  • Question 3
    1 / -0
    If thymectomy is done during adulthood then what is the probable result of it?
    Solution
    Thymectomy is the process in which the thymus gland is removed. Thymus gland is located in the chest area. Thymus gland is responsible for T-cell differentiation. The gland is recommended to be removed in cases of people suffering from Myasthenia gravis. The gland is removed in childhood, which generally have no adverse effects. However, when the gland is removed in adulthood, certain immune functions get affected. T-cells differentiation may be affected leading to improper production of T-cells.
    So, the correct answer is option C. 
  • Question 4
    1 / -0
    Find out the incorrect combination among the following.
    Solution
    Ovaries produce and release two groups of sex hormones progesterone and estrogen. 
    Calcitonin (also known as thyrocalcitonin) is a polypeptide hormone, that is produced in humans primarily by the parafollicular cells (also known as C-cells) of the thyroid.
  • Question 5
    1 / -0
    Which gland prepares you for flight, fright and fight during adverse conditions?
    Solution
    Adrenaline is a hormone secreted by adrenal medulla under an emergency condition to prepare the body for flight or fight response by increasing the intensity of the effect of sympathetic stimulation and response. The pituitary gland regulates secretions of other glands. Thyroid gland serves to regulate the basic metabolic rate. Parathyroid gland regulates blood calcium and phosphate level. Thus, the correct answer is D.
  • Question 6
    1 / -0
    The hormone secreted by kidney is
    Solution
    Erythropoietin is a glycoprotein hormone that controls erythropoiesis, or red blood cell production. It is a cytokine (protein signaling molecule) for erythrocyte precursors in the bone marrow.
    Under hypoxic conditions, the kidney produces and secretes erythropoietin to increase the production of red blood cells.
  • Question 7
    1 / -0
    Which part of thyroid cartilage in larynx is closed?
    Solution
    Larynx lies ventral to the thyroid cartilage. The thyroid cartilage is the largest of the laryngeal cartilages. The thyroid cartilage forms the bulk of the front wall of the larynx. It protects the vocal cords, which are located directly behind it.
  • Question 8
    1 / -0
    Enzyme 'Renin' is secreted by
    Solution
    The juxtaglomerular apparatus (JGA) plays a complex regulatory role. A fall in glomerular blood flow/ glomerular blood pressure/ glomerular filtration rate (GFR) can activate the JG cells to release renin which converts angiotensinogen in blood to angiotensin I and further to angiotensin II. Angiotensin II, being a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR. Angiotensin II also activates the adrenal cortex to release Aldosterone. Aldosterone causes reabsorption of sodium and water from the distal parts of the tubule. This also leads to an increase in blood pressure and GFR. This complex mechanism is generally known as the Renin-Angiotensin mechanism.
    Therefore, the correct answer is option D.
  • Question 9
    1 / -0
    The master gland in the human body is:
    Solution
    The pituitary is a small endocrine gland located below the hypothalamus in the brain. It is called as master gland because its secretion regulates and controls the secretion of other endocrine glands such as thyroid gland, adrenal gland, pancreas etc.
  • Question 10
    1 / -0
    Renin is released from
    Solution
    Renin is the enzyme secreted by the juxta glomerulus of the kidney to the bloodstream. It regulates the blood pressure by converting the angiotensinogen protein to angiotensin I and then further into the angiotens II
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