Melatonin is produced from from Biology Chemical Coordination an

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 Multiple Choice QuestionsMultiple Choice Questions

111.

Which of the following statement is correct in relation to the endocrine system?

  • Adenohypophysis is under direct neural regulation of the hypothalamus

  • Organs in the body like gastrointestinal tract, heart, kidney and liver do not produce any hormones

  • Non- nutrient chemicals produced by the body in trace amount that act as intercellular messenger are known as hormones

  • Releasing and inhibitory hormones are produced by the pituitary gland


112.

Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom

  • Endocrine gland Hormone Function/ deficiency symptoms
    Anterior pituitary Oxytocin Stimulates uterus contraction during child birth
  • Posterior pituitary Growth Hormone (GH) Oversecretion stimulates abnormal growth
  • Thyroid gland Thyroxine Lack of iodine in diet results in goitre
  • Corpus luteum Testosterone Stimulates spermatogenesis

113.

Which of the following pituitary hormones is secreted without the involvement of a Releasing Hormone (RH)?

  • Thyroid Stimulating Hormone (TSH)

  • Follicle Stimulating Hormone (FSH)

  • Oxytocin

  • Prolactin


114.

Which of the following hormones is a derivative of fatty acid?

  • Gastrin

  • Thyroxin

  • Estrogen

  • Prostaglandins


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115.

Cells die at the time of release of secretory materials in

  • holocrine gland

  • apocrine gland

  • merocrine gland

  • mixed or apocrine gland


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116.

Melatonin is produced from

  • pineal gland

  • adrenal gland

  • parathyroid gland

  • ovary


A.

pineal gland

Pineal gland secretes a hormone called melatonin. This hormone plays a very important role in the regulation of a 24 hour (diurnal) rhythm of our body. It also influences metabolism, pigmentation, the menstrual cycle as well as our defense capability.

Adrenal gland is composed of two types of tissues, adrenal medulla and adrenal cortex. Adrenal medulla, secretes hormones adrenaline or epinephrine and noradrenaline or norepinephrine. Adrenal cortex secretes many hormones called as corticoids.

The parathyroid glands secrete a peptide hormone called parathyroid hormone. This hormone increases the Ca2+ levels in the blood.

Ovary produces two groups of steroid hormones called oestrogen and progesterone.


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117.

Zymogenic cells of gastric gland secrete

  • pepsinogen

  • trypsin

  • pepsin

  • chymotrypsin


118.

Which one of the following is called intra-specific chemical messenger?

  • Pheromones

  • Prostaglandins

  • Corticotrophin

  • Catecholamines


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119.

Which one of the following secretes glucagon?

  • Beta (β) cells of islets of Langerhans

  • Alpha (α) cells of islets of Langerhans

  • Acidophilic cells of adenohypophysis

  • Basophilic cells of adenohypophysis


120.

Which one of the following enzymes is responsible for the conversion of norepinephrine to epinephrine?

  • Catecholamine-O-methyltransferase

  • Phenylalanine-N-methyltransferase

  • DOPA decarboxylase

  • Monoamine oxidase


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