Chemical coordination and integration MCQs with Answers

Question-1. Which of the following is an emergency hormone?

1. Norepinephrine
2. Androgen
3. Cortisol
4. FSH

Question-2. Adrenaline directly affects

1. SA node
2. ß-cells of Langerhans
3. dorsal root of spinal cord
4. epithelial cells of stomach

Question-3. Blood glucose level in man is regulated by

1. glucagon and insulin
2. All of the above
3. adrenaline
4. insulin

Question-4. Chemically hormones are

1. proteins, steroids and biogenic amines
2. proteins only
3. steroids only
4. biogenic amines only

Question-5. Compared to a bull a bullock is docile because of

1. higher levels of thyroxin
2. higher levels of cortisone
3. lower levels of blood testosterone
4. lower levels of adrenalin/ noradrenalin in its blood

Question-6. Diabetes is due to

1. iodine deficiency
2. hormonal deficiency
3. Na+ deficiency
4. enzyme deficiency

Question-7. Estrogen and testosterone are steroid hormones, and most likely bind to

1. cytoplasmic receptors
2. G-protein coupled membrane receptors
3. enzyme-linked membrane reseptors
4. membrane ion channels

Question-8. Feeling the tremors of an earthquake a scared resident of seventh floor of a multistoryed building starts climbing down the stairs rapidly.Which hormone initiated this action ?

1. Thyroxin
2. Adrenalin
3. Glucagon
4. Gastrin

Question-9. Gastric secretion is stopped by hormone

1. enterogesterone
2. gastrin
3. pancryeozymin
4. cholecystokinin

Question-10. Hormones are produced at a particular centralized site and transported throughout the organism by means of

1. an internal transport system
2. cellular communication
3. an integrated neural pathway system
4. a series of synapses

Question-11. Hormones generally cause a response in a cell by

1. binding with a receptor and stimulating protein production
2. changing the polarity of the cell membrane and causing a cascade of events within the cell.
3. halting all other cellular activity except the required response
4. interacting directly with the cellÂ’s DNA

Question-12. Hormones thyroxine, adrenalin and the pigment melanin are formed from

1. tryptophan
2. glycine
3. tyrosine
4. proline

Question-13. Hypoglycemic hormone is

1. Insulin
2. Thyroxine
3. Glucagon
4. Calcitonin

Question-14. In human adult females, oxytocin

1. is secreted by anterior pituitary
2. stimulates growth of mammary glands
3. stimulates pituitary to secrete vasopressin
4. causes strong uterine contractions during parturition

Question-15. Increase in bleeding time and delay in blood coagulation is due to the deficiency of which hormone?

1. Parathormone
2. Adrenaline
3. Noradrenaline
4. Thyroxine

Question-16. Injury to adrenal cortex is not likely to affect the secretion of which one of the following?

1. Aldosterone
2. Both Androstenedione and Dehydroepiandrosterone
3. Adrenaline
4. Cortisol

Question-17. Insulin is

1. vitamin
2. lipid
3. hormone
4. enzyme

Question-18. Melanin protects from

1. UV rays
2. visible rays
3. infra-red rays
4. X-rays

Question-19. Melanocyte Stimulating Hormone (MSH) is produced by

1. anterior pituitary
2. posterior pituitary
3. pars intermedia of pituitary
4. parathyroid

Question-20. Melatonin is secreted by

1. skin
2. thymus
3. pituitary
4. pineal gland

Question-21. Nicotine acts as a stimulant, because it mimics the effect of

1. thyroxine
2. acetylcholine
3. testosterone
4. dopamine

Question-22. Researchers have found increased levels of hormones from the _____ in the blood of students preparing for final exams. These hormones are produced in response to stress

1. adrenal glands
2. pineal gland
3. thyroid gland
4. posterior pituitary

Question-23. Steroid hormones transmit their information by

1. the help of an intracellular second messenger
2. entering into the cell and modifying nuclear organization
3. entering into the cell and modifying cellular contents
4. stimulating the receptors present on cell membrance

Question-24. Steroid-based hormones are able to act inside the cell. This is possible because

1. steroid-based hormones are hydrophobic molecules that can pass through the cell membrane
2. proteins carry them into the cell.
3. hormones must interact with the nucleus to have an effect.
4. there are no receptors for hormones on the cell surface

Question-25. Target cells

1. Both
2. react specifically to a chemical messenger
3. react specifically to a chemical messenger
4. None of these

Question-26. The 24 hour (diurnal) rhythm of our body such as the sleepwake cycle is regulated by the hormone

1. Melatonin
2. Prolactin
3. Adrenaline
4. Calcitonin

Question-27. The blood calcium level is lowered by the deficiency of

1. parathormone
2. thyroxine
3. both calcitonin and parathormone
4. calcitonin

Question-28. The function of oxytocin is to help in

1. growth
2. lactation
3. child birth
4. gametogenesis

Question-29. The gonadotropic hormones are produced in

1. interstitial cells of testes
2. adrenal cortex
3. adenohypophysis of pituitary
4. posterior part of thyroid

Question-30. The hormone which regulates the basal metabolism in our body is secreted from

1. pituitary
2. thyroid
3. adrenal cortex
4. pancreas

Question-31. The only unicellular exocrine glands in our body are

1. Mucus secreting goblet cells
2. Mammary glands
3. Sebaceous glands
4. Sweat glands

Question-32. The phase of menstrual cycle in humans that lasts for 7-8 days, is

1. ovulatory phase
2. menstruation
3. luteal phase
4. follicular phase

Question-33. The technique used for estimation of minute amounts of hormones and drugs is called

1. radioimmunoassay
2. electroencephalogram
3. fractionation
4. None of these

Question-34. Toxic agents present in food which interfere with thyroxine synthesis lead to the development of

1. toxic goitre
2. cretinism
3. simple goitre
4. thyrotoxicosis

Question-35. Which hormone causes dilation of blood vessels, increased oxygen consumption and glucogenesis ?

1. ACTH
2. Insulin
3. Adrenalin
4. Glucagon

Question-36. Which hormone interacts with membrane bound receptor and does not normally enter the target cell ?

1. Follicle stimulating hormone
2. Estrogen
3. Thyroxin
4. Cortisol

Question-37. Which of the following endocrine gland stores its secretion in the extracellular space before discharging into the blood? [

1. Pancreas
2. Adrenal
3. Testis
4. Thyroid

Question-38. Which of the following glands grows to the maximum size at puberty and then diminishes gradually?

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

Question-39. Which of the following hormones is not a secretion product of human placenta ?

1. Human chorionic gonadotropin
2. Prolactin
3. Estrogen
4. Progesterone

Question-40. Which of the following is an accumulation and release centre of neurohormones ?

1. Posterior pituitary lobe
2. Intermediate lobe of the pituitary
3. Hypothalamus
4. Anterior pituitary lobe

Question-41. Which of the following radioactive isotope is used in the detection of thyroid cancer?

1. Iodine-131
2. Carbon-14
3. Uranium-238
4. Phosphorus-32

Question-42. Which one of the following hormones is a modified amino acid ?

1. Epinephrine
2. Progesterone
3. Prostaglandin
4. Estrogen

Question-43. Which one of the following hormones is not involved in sugar metabolism ?

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

Question-44. Which one of the following hormones stimulates the “let down” (release) of milk from the mother’s breasts when the baby is sucking?

1. Progesterone
2. Oxytocin
3. Prolactin
4. Relaxin

Question-45. Which one of the following hormones though synthesized elsewhere, is stored and released by the master gland ?

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

Question-46. Which one of the following is not a second messenger in hormone action ?

1. Sodium
2. cGMP
3. Calcium
4. cAMP

Question-47. Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency ?

1. Luteinizing hormone — Failure of ovulation
2. Insulin — Diabetes insipidus
3. Thyroxine — Tetany
4. Parathyroid hormone — Diabetes mellitus

Question-48. Which one of the following pairs is incorrectly matched ?

1. Glucagon - Beta cells (source)
2. Somatostatin - Delta cells (source)
3. Corpus luteum - Relaxin (secretion)
4. Insulin - Diabetes mellitus (disease)

Question-49. Which one of the following pairs of organs includes only the endocrine glands?

1. Parathyroid and adrenal
2. Pancreas and parathyroid
3. Thymus and testes
4. Adrenal and ovary

Question-50. Which steroid is used for transformation ?

1. Cortisol
2. Cholesterol
3. Testosterone
4. Progesterone

Question-51. A common scent-producing gland among mammals is

1. anal gland
2. prostate gland
3. adrenal gland
4. BartholinÂ’s gland

Question-52. A person is having problems with calcium and phosphorus metabolism in his body.Which one of the following glands may not be functioning properly ?

1. Parathyroid
2. Parotid
3. Pancreas
4. Thyroid

Question-53. A steroid hormone which regulates glucose metabolism is

1. cortisol
2. corticosterone
3. 11-deoxycorticosterone
4. cortisone

Question-54. According to the accepted concept of hormone action, if receptor molecules are removed from target organs, then the target organ will

1. not respond to the hormone
2. continue to respond to hormone without any difference
3. continue to respond to the hormone but in the opposite way
4. continue to respond to the hormone but will require higher concentration

Question-55. Acromegaly is caused by

1. excess of STH
2. excess of thyroxin
3. deficiency of thyroxin
4. excess of adrenalin

Question-56. Addition of a trace of thyroxine or iodine in water containing tadpoles will

1. keep them in larval stage
2. hasten their metamorphosis
3. slow down their metamorphosis
4. kill the tadpoles

Question-57. ADH or vasopressin is

1. enzyme that hydrolyses peptides
2. hormone secreted by pituitary that promotes reabsorption of water from glomerular filtrate
3. hormone that promotes glycogenolysis
4. energy rich compound connected with muscle contraction

Question-58. Anabolic steroids are…..................versions of testosterone.

1. Effective
2. Synthetic
3. Natural
4. Ineffective

Question-59. Chemical name of T4 is

1. Tetradiodothyronine
2. Tridiodothyronine
3. Tetraiodothyronine
4. Triiodothyronine

Question-60. Choose the incorrect statement.

1. Hormones are non-nutrient chemicals.
2. Exocrine glands are ductless glands.
3. Invertebrates have simple endocrine system.
4. All of the above statements are incorrect.

Question-61. Corpus luteum secretes

1. progesterone
2. estrogen
3. glucagon
4. vasopressin

Question-62. Diurnal rhythm of the body is maintained by

1. melatonin
2. isthmus
3. PTH
4. norepinephrine

Question-63. Endemic goitre is a state of

1. Increased thyroid function
2. Normal thyroid function
3. Decreased thyroid function
4. Moderate thyroid function

Question-64. Glucagon hormone is secreted by the

1. Thyroid gland
2. Adrenal gland
3. Pituitary gland
4. Pancreas

Question-65. In adults, insufficient thyroxine can lead to

1. Goiter
2. Tetany
3. Cretinism
4. Myxedema

Question-66. In children, hypothyroidism (underactive thyroid gland) can lead to ______

1. Goiter
2. Acromegaly
3. Cretinism
4. Myxedema

Question-67. In the body, both the blood sodium and potassium levels are regulated by _______.

1. Pheromones
2. Aldosterone
3. Cortisol
4. Androgens

Question-68. PTH is called as hypercalcemic hormone because it leads to the

1. absorption of CaCO3 from the digested food
2. reabsorption of water from renal tubules
3. increasing blood calcium levels
4. maintainence ion balance in blood

Question-69. Secretin causes stimulation of

1. water
2. bile juice
3. gastric secretion
4. pepsinogen

Question-70. Which hormone inhibits the release of growth hormone?

1. Insulin
2. Gonadotrophin
3. Somatostatin
4. Thymosin

Question-71. Which of the following acts on bones?

1. Melatonin
2. Triiodothyronine
3. GH
4. Parathyroid

Question-72. Which of the following is essential for thyroid gland?

1. NaCl
2. I3
3. CaCO2
4. H2CO3

Question-73. Which one of the followings are male sex hormones?

1. Insulins
2. Aldosterones
3. Androgens
4. Pheromones