Chemical Coordination Multiple Choice Question And Answers

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Chemical Coordination Multiple-Choice Questions

Question 1. A decrease in blood pressure/volume will not cause the release of—

  1. Atrial Natriuretic Factor
  2. Aldosterone
  3. ADH
  4. Renin

Answer: 1. Atrial Natriuretic Factor

Question 2. A hypothalamic hormone, needed in

  1. The anterior pituitary gland stimulates the secretion of LH and FSH
  2. The posterior pituitary gland stimulates the secretion of oxytocin and FSH
  3. The posterior pituitary gland stimulates the secretion of LH and relaxin
  4. The anterior pituitary gland stimulates the secretion of LH and oxytocin

Answer: 1. Anterior pituitary gland stimulates the secretion of LH and FSH

Question 3. Hypersecretion of Growth Hormone in adults does not cause further increase in height because—

  1. Epiphyseal plates close after adolescence
  2. Bones lose their sensitivity to Growth Hormone in adults
  3. Muscle fibers do not grow in size after birth
  4. Growth Hormone becomes inactive in adults

Answer: 1. Epiphyseal plates close after adolescence

Question 4. Changes in GnRH pulse frequency in females are controlled by circulating levels of—

  1. Oestrogen and inhibin
  2. Progesterone only
  3. Progesterone and inhibin
  4. Oestrogen and progesterone

Answer: 4. Oestrogen and progesterone

Read and Learn More WBCHSE Multiple Choice Question and Answers for Class 11 Biology

Question 5. Identify the correct statement on ‘inhibin’—

  1. Is produced by granulosa cells in the ovary and inhibits the secretion of FSH
  2. Is produced by granulosa cells in
  3. Is produced by nurse cells in the testes and inhibits the secretion of LH
  4. Inhibits the secretion of LH, FSH, and prolactin

Answer: 1. Is produced by granulosa cells in the ovary and inhibits the secretion of FSH

Question 6. Select the incorrect statement—

  1. LH and FSH trigger ovulation in the ovary
  2. LH and FSH decrease gradually during the follicular phase
  3. LH triggers the secretion of androgens from the Leydig cells
  4. FSH stimulates the Sertoli cells which help in spermiogenesis.

Answer: 2. LH and FSH decrease gradually during the follicular phase

Question 7. The amino acid, tryptophan is the precursor for the synthesis of—

  1. Thyroxine and triiodothyronine
  2. Oestrogen and progesterone
  3. Cortisol and cortisone
  4. Melatonin and serotonin

Answer: 4. Melatonin and serotonin

Question 8. Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?

  1. Insulin—Glucagon
  2. Aldosterone—Atrial natriuretic factor
  3. Relaxin—Inhibin
  4. Parathormone—Calcitonin

Answer: 3. Relaxin—Inhibin

Question 9. Which hormones stimulate the production of pancreatic juice and bicarbonate?

  1. Angiotensin and epinephrine
  2. Gastrin and insulin
  3. Cholecystokinin and secretin
  4. Insulin and glucagon

Answer: 3. Cholecystokinin and secretin

Question 10. Name a peptide hormone that acts mainly on hepatocytes, and adipocytes and enhances cellular glucose uptake and utilisation.

  1. Insulin
  2. Glucagon
  3. Secretin
  4. Gastrin

Answer: 1. Insulin

Question 11. The posterior pituitary gland is not a ‘true’ endocrine gland because—

  1. It is provided with a duct
  2. It only stores and releases hormones
  3. It is under the regulation of the hypothalamus
  4. It secretes enzymes

Answer: 2. It only stores and releases hormones

Question 12. several hormones like hCG, hPL, estrogen and progesterone are produced by—

  1. Ovary
  2. Placenta
  3. Fallopian tube
  4. Pituitary

Answer: 2. Placenta

Question 13. Graves’ disease is caused due to—

  1. Hyposecretion of the thyroid gland
  2. Hypersecretion of the thyroid gland
  3. Hyposecretion of the adrenal gland
  4. Hypersecretion of the adrenal gland

Answer: 2. Hypersecretion of thyroid gland

Question 14. Which of the following events is not associated with ovulation in human females?

  1. LH surge
  2. Decrease in estradiol
  3. Full development of Graafian follicle
  4. Release of secondary oocyte

Answer: 2. Decrease in estradiol

Question 15. Which one of the following hormones is not involved in sugar metabolism?

  1. Glucagon
  2. Cortisone
  3. Aldosterone
  4. Insulin

Answer: 3. Aldosterone

Question 16. Which one of the following hormones though synthesised elsewhere, is stored and released by the master gland?

  1. Melanocyte stimulating hormone
  2. Antidiuretic hormone
  3. Luteinizing hormone
  4. Prolactin

Answer: 4. Prolactin

Question 17. Injury localized to the hypothalamus would most likely disrupt—

  1. Short term ’Memory’
  2. Coordination during locomotion
  3. Executive function, such as decision-making
  4. Regulation of body temperature

Answer: 2. Coordination during locomotion

Question 18. Identify the hormone with its correct matching of source and function—

  1. Oxytocin—Posterior pituitary, growth and maintenance of mammary glands
  2. Melatonin—The pineal gland, regulates the normal rhythm of the sleep-wake cycle
  3. Progesterone—Corpus luteum, stimulation of growth and activities of female secondary sex organs
  4. Atrial natriuretic factor—Ventricular wall, increases the blood pressure

Answer: 2. Melatonin—The pineal gland, regulates the normal rhythm of the sleep-wake cycle

Question 19. Fight or flight reactions cause activation of—

  1. The parathyroid glands, leading to an increased metabolic rate
  2. The kidney, leading to suppression of the renin-angiotensin-aldosterone pathway
  3. The adrenal medulla, leading to increased secretion of epinephrine and norepinephrine
  4. The pancreas, leading to a reduction in the blood sugar levels

Answer: 3. The adrenal medulla, leading to increased secretion of epinephrine and norepinephrine

Question 20. Which of the following hormones is a derivative of fatty acid?

  1. Gastrin
  2. Thyroxine
  3. Oestrogen
  4. Prostaglandins

Answer: 4. Prostaglandins

Question 21. Which of the following pituitary hormones is secreted without the involvement of a Releasing Hormone (RH)?

  1. Thyroid Stimulating Hormone (TSH)
  2. Follicle Stimulating Hormone (FSH)
  3. Oxytocin
  4. Prolactin

Answer: 3. Oxytocin

Question 22. The diurnal rhythms are regulated by—

  1. Adrenaline
  2. Melatonin
  3. Serotonin
  4. Vasopressin

Answer: 2. Melatonin

Question 23. Match the hormones secreted by various endocrine structures and choose the correct option:

Biology Class 11 Chapter 22 Chemical Coordination Match The Coloumns

  1. 1-5,2-1,3-4,4-2,5-3
  2. 1-5,2-4,3-1,4-2,5-3
  3. 1-3,2-1,3-4,4-2,5-5
  4. 1-3,2-1,3-4,4-5,5-2

Answer: 4. 1-3,2-1,3-4,4-5,5-2

Question 24. Which of the following statements is wrong?

  1. Sella turcica is a bony cavity where the pituitary gland is located
  2. The parathyroid hormone decreases the Ca2+ levels in the blood
  3. Thymosins play a major role in T-cell differentiation
  4. The middle layer of the adrenal cortex is the zona fasciculata
  5. Insulin stimulates Glycogenesis

Answer: 2. Parathyroid hormone decreases the Ca2+ levels in blood

Question 25. An endocrine gland in humans, which plays an important role in the regulation of the rhythm of the body is-

  1. Adrenal gland
  2. Pineal gland
  3. Thymus
  4. Thyroid gland

Answer: 2. Pineal gland

Question 26. Insulin causes rapid movement of glucose from the blood to hepatocytes and adipocytes resulting in—

  1. Hyperglycemia
  2. Hypoglycemia
  3. Diabetes
  4. None of these

Answer: 2. Hypoglycemia

Question 27. Identify the hormones, A, B, and C that are labeled in the given flowchart—

Biology Class 11 Chapter 22 Chemical Coordination Multiple Choice Question 27

  1. 1-GnRH 2-ICSH 3-FSH
  2. 1-GH 2-FSH 3-LH
  3. 1-GnRH 2-PRL 3-ICSH
  4. 1-GnRH 2-FSH 3-LH

Answer: 4. 1-GnRH 2-FSH 3-LH

Question 28. Which one of the following hormones also produces anti-inflammatory reactions in man and suppresses the immune response in addition to its primary functions?

  1. Cortisol
  2. Thymosin
  3. Thyrocalcitonin
  4. Erythropoietin

Answer: 1. Cortisol

Question 29. Match the following columns:

Biology Class 11 Chapter 22 Chemical Coordination Match The Coloumns 29

  1. 1-3,2-1,3-4,4-2
  2. 1-1,2-3,3-2,4-4
  3. 1-1,2-3,3-4,4-2
  4. 1-3,2-1,3-2,4-4

Answer: 3. 1-1,2-3,3-4,4-2

Question 30. The Hormone Responsible For Fight And fight-and-fight response is

  1. Adtenaline
  2. Thyrocine
  3. ADH
  4. Oxytocin

Answer: 1. Adtenaline

Question 31. Name The Hormome that has no role in menstruation

  1. LH
  2. FSH
  3. GH
  4. TSH

Answer: 3. GH

Question 32. Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom.

Biology Class 11 Chapter 22 Chemical Coordination Match The Coloumns 32

Answer: 3.

Question 33. Which of the following statements is correct in relation to the endocrine system?

  1. The adenohypophysis is under direct neural regulation of the hypothalamus.
  2. Organs in the body gastrointestinal tract, heart, kidney, and liver do not produce any hormones.
  3. Non-nutrient chemicals produced by the body in trace amounts that act as intercellular messenger are known as hormones.
  4. Releasing and inhibitory hormones are produced by the pituitary gland.

Answer: 3. Non-nutrient chemicals produced by the body in trace amount that act as intercellular messenger are known as hormones.

Question 34. Removal or absence of thymus in early life shall bring about—

  1. Lack of lymphocytes
  2. Lack of antibodies
  3. Lack of lymph nodes
  4. Both 1 and 2

Answer: 4. Both 1 and 2

Question 35. Gland responsible for calcium metabolism is—

  1. Thymus
  2. Thyroid
  3. Parathyroid
  4. Adrenal

Answer: 3. Parathyroid

Question 36. The Leydig cells secrete—

  1. Oestrogen
  2. Testosterone
  3. Progesterone
  4. Corticosterone

Answer: 2. Testosterone

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