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Chemical Coordination and Integration Test 26

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Chemical Coordination and Integration Test 26
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  • Question 1
    1 / -0
    Melatonin and serotonin hormones are secreted by
    Solution
    A. Thymus gland is associated with the development of immune system and present on the dorsal side of heart.
    B. Pineal gland is a small, rounded and reddish brown gland present at the dorsal side of forebrain. This gland secretes melatonin and serotonin hormones.
    C. Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone.
    D. Adrenal gland is present on upper side of kidneys and has two parts, adrenal cortex which secrete glucocorticoids, mineralocorticoids and sexocorticoids and adrenal medulla which secrete adrenaline and nor-adrenaline hormone.
    So, the correct answer is 'Pineal'.
  • Question 2
    1 / -0
    In hypothalamus are located various centres of
    Solution
    Central regulation of energy metabolism. In normal individuals, food intake and energy expenditure are tightly regulated by homeostatic mechanisms to maintain energy balance. Substantial evidence indicates that the brain, particularly the hypothalamus, is primarily responsible for the regulation of energy homeostasis.
    Hence, the correct answer is (A)
  • Question 3
    1 / -0
    The primary target of the hormones of hypothalamus is 
    Solution
    A. Pineal gland is a small, rounded and reddish brown gland present at the dorsal side of forebrain. This gland secretes melatonin and serotonin hormones.
    B. Thymus gland is associated with the development of immune system and present on the dorsal side of heart.
    C. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.
    D. Testis are the primary sex organs in males that secrete the hormone testosterone.
    The hormones secreted by hypothalamus reach the pituitary gland through circulatory system and regulate the functions of anterior part of pituitary gland. Hence, the primary target of hormones of hypothalamus is pituitary gland.
    So, the correct answer is 'Pituitary'.
  • Question 4
    1 / -0
    Diencephalon is related to
    Solution
    D. Hypothalamus
    Reason: The diencephalon is a part of the prosencephalon also known as the forebrain and is situated between the telencephalon and the mesencephalon (midbrain). It is made up of structures that are on either side of the third ventricle. It includes the thalamus, the hypothalamus, the posterior portion of the pituitary gland, and the pineal gland. So the correct option is D.
  • Question 5
    1 / -0
    The organ which was considered vestigial till recently but now confirmed to be endocrine gland is
    Solution
    A. Thymus gland is associated with the development of immune system and present on the dorsal side of heart.
    B. Pancreas is a heterocrine gland as it acts both as endocrine and exocrine gland. It secretes insulin hormone into blood and act as endocrine gland and when it secretes digestive enzymes and juice through pancreatic duct, it acts as exocrine gland.
    C. Pineal gland is a small, rounded and reddish brown gland present at the dorsal side of forebrain. This gland secretes melatonin and serotonin hormones.
    D. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.
    The organ which was considered vestigial till recently but now confirmed to be endocrine gland is pineal gland that secretes melatonin hormone associated with the regulation of rhythm of our body.
    So, the correct answer is 'Pineal'.
  • Question 6
    1 / -0
    Which of the following glands grows to the maximum size at puberty and then diminishes gradually? 
    Solution
    A. Thymus gland is associated with the development of immune system and present on the dorsal side of heart. It secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes. This gland shows maximum development in children during puberty and after that, it starts diminishing gradually and by the age of 70, it becomes a tiny structure.
    B. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.
    C. Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone which increases oxygen consumption by metabolically active tissues.
    D. Adrenal gland is present on upper side of kidneys and has two parts, adrenal cortex which secrete glucocorticoids, mineralocorticoids and sexocorticoids and adrenal medulla which secrete adrenaline and nor-adrenaline hormone.
    So, the correct answer is 'Thymus'.
  • Question 7
    1 / -0
    Human male sex hormone or androgen present in urine of males is
    Solution
    A. Testosterone is the male sex hormone secreted from testis and stimulates the development of secondary sexual characteristics in males.
    B. Androstenedione is a precursor of testosterone hormone and used to increase the production of testosterone hormone. 
    C. Dehydroepiandrosterone is also known as androstenolone and is a steroid hormone secreted from adrenal glands.
    D. Androsterone is the inactive male sex hormone produced from the metabolism of testosterone. This hormone is present in urine.
    So, the correct answer is 'Androsterone'.
  • Question 8
    1 / -0
    Hypothalamus does not control
    Solution
    Creative thinking and consciousness are regulated by mainly the frontal lobe of cerebral cortex.
  • Question 9
    1 / -0
    Triple 'F' or gland for flight, fight and fright/ life saving/emergency gland is 
    Solution
    A. Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone which increases oxygen consumption by metabolically active tissues.
    B. Thymus gland is associated with the development of immune system and present on the dorsal side of heart.
    C. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.
    D. Adrenal gland is present on upper side of kidneys and has two parts, adrenal cortex which secrete glucocorticoids, mineralocorticoids and sexocorticoids and adrenal medulla which secrete adrenaline and nor-adrenaline hormone. Adrenaline is also known as emergency hormone. This hormone is associated with maintenance of homeostasis in body and is secreted in response to any kind of stress or emergency in the body. It is also known as hormone of fight or flight.
    So, the correct answer is 'Adrenal'.
  • Question 10
    1 / -0
    Hypothalamus is not involved in
    Solution

    • Hypothalamus is a part of the brain where the pituitary gland is attached. The functions of the hypothalamus are in association with the gland.
    • The hormones which are released from this gland perform various functions.
    • The hormones are involved in functions like temperature regulation, sleep and wake control cycle, osmoregulation, homeostasis, thirst, hunger, and mood.
    So, the correct answer is option (C)

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