Chemical Coordination in Animals
Multiple Choice Questions and Answers
1.The posterior pituitary
(a) produces oxytocin
(b) is under the control of hypothalamic releasing neurohormone
(c) secretes trophic hormones
(d) secretes neurohormone
Answer: (a) produces oxytocin
2. Parathyroid hormone
(a) is produced by the thyroid gland
(b) is released when blood calcium levels fall
(c) stimulates osteoblasts to lay down new bone
(d) stimulates calcitonin release
Answer: (b) is released when blood calcium levels fall
3. Steroid hormones
(a) have only cell surface receptors
(b) are lipophobic
(c) act through altering the activity of proteins in the target cell
(d) are produced by the adrenal cortex
Answer: (c) act through altering the activity of proteins in the target cell
4. Both adrenaline and cortisol and secreted in response to stress. Which of the following statements is also true for both of these hormones?
(a) They act to increase blood glucose.
(b) They are secreted by the adrenal cortex.
(c) Their secretion is stimulated by adrenocorticotropin.
(d) They are secreted into the blood within seconds of the onset of stress.
Answer: (a) They act to increase blood glucose.
5. Blood pressure is under the control of
(a) adrenal
(b) thyroid
(c) thymus
(d) pituitary
Answer: (a) adrenal
6. Master endocrine gland is
(a) thyroid
(b) pituitary
(c) parathyroid
(d) pineal
Answer: (b) pituitary
7. Largest completely endocrine gland is
(a) thyroid
(b) pituitary
(c) parathyroid
(d) adrenal
Answer: (a) thyroid
8. Secretion of milk is maintained by
(a) relaxin
(b) oestrogen
(c) progesterone
(d) prolactin
Answer: (d) prolactin
9. Implantation of embryo and production of placenta is controlled by
(a) progesterone
(b) oestrogen
(c) testosterone
(d) prolactin
Answer: (a) progesterone
10. Insulin is secreted by pancreas in
(a) beta-cells
(b) alpha cells
(c) gamma cells
(d) acinus
Answer: (a) beta-cells
11. Under fear, the endocrine gland which becomes active is
(a) thyroid
(b) thymus
(c) adrenal
(d) ovary
Answer: (c) adrenal
12. A heterocrine gland is
(a) pancreas
(b) salivary
(c) kidney
(d) liver
Answer: (a) pancreas
13. The hormone that causes change in appearance of males during puberty is
(a) progesterone
(b) oestrogen
(c) testosterone
(d) thyroxine
Answer: (c) testosterone
14. Hormone is
(a) excretory product
(b) enzymatic product
(c) chemical messenger
(d) nerve impulse
Answer: (c) chemical messenger
15. Diabetes insipidus is caused by reduced activity in
(a) thyroid
(b) anterior lobe of pituitary
(c) intermediate pituitary lobe
(d) posterior lobe of pituitary
Answer: (d) posterior lobe of pituitary
16. The hormone which converts glucose to glycogen inside liver, is produced in
(a) thymus
(b) adrenal
(c) parathyroid
(d) pancreas
Answer: (d) pancreas
17. Iodine of iodised salt is stored in
(a) thyroid
(b) parathyroid
(c) liver
(d) pituitary
Answer: (a) thyroid
18. Receptors for protein hormones are located
(a) in cytoplasm
(b) on cell surface
(c) in nucleus
(d) on endoplasmic reticulum
Answer: (b) on cell surface
19. Secretin stimulates
(a) pancreas
(b) gallbladder
(c) lungs
(d) gastric gland
Answer: (a) pancreas
20. A substance called ADH is
(a) a hormone that promotes glycogenesis in liver cells
(b) an enzyme secreted by cells of intestinal wall; hydrolysis dipeptidase into amino acids
(c) a pituitary secretion which promotes reabsorption of water from glomerular filtrate
(d) a high energy compound involved in muscle contraction
Answer: (c) a pituitary secretion which promotes reabsorption of water from glomerular filtrate
21. Treatment with alloxan destroys
(a) STH cells
(b) Beta cells of islets of langerhans
(c) cells of sertoli
(d) cells of leydig
Answer: (b) Beta cells of islets of langerhans
22. Table salt is often iodized for certain areas to prevent
(a) Scurvy
(b) Goitre
(c) Acromegaly
(d) Rickets
Answer: (b) Goitre
23. Pitutary gland is under the control of
(a) pineal gland
(b) hypothalamus
(c) adrenal gland
(d) thyroid gland
Answer: (b) hypothalamus
24. Diabetes insipidus is caused by hyposecretion of
(a) insulin
(b) vasopression
(c) oxytocin
(d) thymosin
Answer: (b) vasopression
25. Reabsorption of water in distal parts of kidney tubules/ urine concentration is controlled by
(a) vasopressin/ADH
(b) oxytocin
(c) calcitonin
(d) relaxin
Answer: (a) vasopressin/ADH
26. Pancreas secretes
(a) insulin
(b) glucagon
(c) both insulin and glucagon
(d) secretin
Answer: (c) both insulin and glucagon
27. Failure of reduced insulin production causes
(a) Diabetes mellitus
(b) Diabetes insipidus
(c) Addison’s disease
(d) Crushing’s disease
Answer: (a) Diabetes mellitus
28. If parathyroid gland degenerates which activity is disturbed?
(a) growth
(b) calcium concentration
(c) potassium concentration
(d) sodium concentration
Answer: (b) calcium concentration
29. Adrenal cortex produces
(a) adrenaline
(b) epinephrine
(c) aldosterone
(d) calcitonin
Answer: (c) aldosterone
30. FSH is formed by
(a) posterior pituitary lobe
(b) middle pituitary lobe
(c) adrenal cortex
(d) anterior pituitary lobe
Answer: (d) anterior pituitary lobe
31. Ovulation in mammals is caused by
(a) FSH and TSH
(b) FSH and LH
(c) FSH and LTH
(d) LTH and LH
Answer: (b) FSH and LH
32. Gastric secretion is stopped by hormone
(a) enterogastrone
(b) gastrin
(c) pancreozymin
(d) cholecystokinin
Answer: (a) enterogastrone
33. Blood calcium level can be increased by administration of
(a) glucagon
(b) parathormone
(c) thyroxine
(d) calcitonin
Answer: (b) parathormone
34. Which hormone is responsible for ovulation?
(a) FSH
(b) LH
(c) Testosterone
(d) Oestrogen
Answer: (b) LH
35. The hormone that stimulates the stomach to secrete gastric juice is
(a) gastrin
(b) enterogastrone
(c) enterokinase
(d) renin
Answer: (a) gastrin
36. The contraction of gall bladder is due to
(a) enterogastrone
(b) gastrin
(c) cholecystokinin
(d) secretin
Answer: (c) cholecystokinin
37. The most important component of oral contraceptive pill is
(a) progesterone
(b) growth hormone
(c) thyroxine
(d) luteinizing hormone
Answer: (d) luteinizing hormone
38. Hormone melatonin is secreted by
(a) adrenal
(b) thymus
(c) pituitary
(d) pineal
Answer: (d) pineal
39. Cretinism is produced when one of the following is deficient
(a) adrenaline
(b) growth hormone
(c) parathormone
(d) thyroxine
Answer: (d) thyroxine
40. Mainly which type of hormones control the menstrual cycle in human beings
(a) FSH
(b) LH
(c) FSH, LH and Oestrogen
(d) Progesterone
Answer: (c) FSH, LH and Oestrogen
41. When both ovaries are removed from rats then which hormone is decreased in blood?
(a) oxytocin
(b) prolactin
(c) oestrogen
(d) gonadotrophic
Answer: (c) oestrogen
42. Acromegaly is caused by
(a) excess of S.T.H.
(b) excess of thyroxine
(c) deficiency of thyroxine
(d) excess of adrenaline
Answer: (a) excess of S.T.H.
43. Choose the correct statement about neurohypophysis
(a) it stores the hormones produced by adenohypophsis
(b) it is poorly developed and functionless in humans
(c) it stores and releases hormone secreted by hypothalamus
(d) it secretes its own hormones
Answer: (c) it stores and releases hormone secreted by hypothalamus
44. Moulting hormone is secreted in insects by which gland?
(a) corpora allata
(b) pineal gland
(c) hypothalamus
(d) prothoracic gland
Answer: (d) prothoracic gland
45. Progesterone hormone is secreted by which of the following glands?
(a) corpus luteum
(b) placenta
(c) mature graphical follicle
(d) pituitary
Answer: (a) corpus luteum
46. Spermatogenesis is induced by
(a) PSH
(b) ACTH
(c) ATC
(d) ATH
Answer: (a) PSH
47. The hormone ACTH is secreted by
(a) adrenal cortex
(b) adrenal medulla
(c) pituitary gland
(d) thymus gland
Answer: (c) pituitary gland
48. Hormone which helps in production of milk
(a) prolactin
(b) FSH
(c) LH
(d) oxytocin
Answer: (a) prolactin
49. Metamorphosis of tadpole is accelerated by
(a) insulin
(b) growth hormone
(c) vasopressin
(d) thyroxine
Answer: (d) thyroxine
50. Adrenals are located above
(a) stomach
(b) liver
(c) pancreas
(d) kidney
Answer: (d) kidney