MCQ Questions for Class 11 Biology: Ch 22 Chemical Coordination and Integration

MCQ Questions for Class 11 Biology: Ch 22 Chemical Coordination and Integration

1. In the mechanism of action of a protein hormone, one of the second messengers is

(a) Gastrin

(b) Cyclic AMP

(c) T₃

(d) Insulin
► (b) Cyclic AMP

2. Myopia is a defect in human eyes in which the image is formed:

(a) Behind retina and can be corrected by using convex lens

(b) Behind retina and can be corrected by using concave lens

(c) Infront of retina and can be corrected by using concave lens

(d) Infront of retina and can be corrected by using convex lens

► (c) Infront of retina and can be corrected by using concave lens

3. BMR is increased due to:

(a) Sympathetic nervous system

(b) Adrenaline

(c) Parasympathetic nervous system

(d) Thyroxine

► (d) Thyroxine

4. Transmission of light into nerve impulse is a:

(a) Mechanical process

(b) Physical process

(c) Chemical process

(d) Biochemical process

► (d) Biochemical process

5. Steroid hormones easily pass through the plasma membrane by simple diffusion because they

(a) Are water-soluble

(b) Are lipid-soluble

(c) Enter through pores

(d) Contain carbon and hydrogen

► (b) Are lipid-soluble

6. The vitamin which works along with para thyroid hormone is:

(a) Vitamin C

(b) Calciferol

(c) Tocopherol

(d) Vitamin - B₁₂
► (b) Calciferol

7. Parathormone regulates:
(a) Blood calcium level
(b) Calcium phosphate level
(c) Body temperature
(d) None of the above
► (a) Blood calcium level

8. In Hashimoto's disease symptoms develop like :-

(a) Hyposecretion of thyroxine

(b) Hyper secretion of thyroxine

(c) Hyposecreation of adrenaline

(d) None of the above

► (a) Hyposecretion of thyroxine

9. Injection of which of the following increases metabolic rate :-

(a) STH

(b) Insulin

(c) Thyroxine

(d) Testosterone

► (c) Thyroxine

10. Cochlea arises from:

(a) Utriculus

(b) Sacculus

(c) Middle ear

(d) Semicircular canals

► (b) Sacculus

11. Meibomian gland are associated with:

(a) Eyes

(b) Ears

(c) Reproductive organ

(d) Skin

► (a) Eyes

12. The thyroid gland is homologous to which part of lower chordates :-

(a) Neural gland

(b) Pharyngeal gill pouch

(c) Nerve cord

(d) Endostyle

► (d) Endostyle

13. The ‘islets of Langerhans’ are found in

(a) Alimentary canal

(b) Stomach

(c) Liver

(d) Pancreas

► (d) Pancreas

14. If thyroid is removed from tadpole of frog, it will:

(a) Die soon

(b) Remains tadpole throughout life

(c) Grows in to giant frog

(d) Grows into dwarf frog

► (b) Remains tadpole throughout life

15. Cochlea of mammalian ear is concerned with:

(a) Balancing of body

(b) Hearing

(c) Pereception of atmospheric pressure

(d) Both (a) and (b)

► (b) Hearing

16. Which of the following is anvil shaped ear ossicle:

(a) Incus

(b) Malleus

(c) Stapes

(d) Humerus

► (a) Incus

17. Chemically, hormones are

(a) Proteins, steroids and biogenic amines

(b) Steroids only

(c) Biogenic amines only

(d) Proteins only

► (a) Proteins, steroids and biogenic amines

18. Deficiency of which of the following may cause bone deformation :-

(a) PTH

(b) Vitamin D

(c) STH

(d) Thyroxine

► (b) Vitamin D

19. Rabbit has:

(a) Monocular vision

(b) Binocular vision

(c) Conjunctiva

(d) Cornea

► (a) Monocular vision

20. The fluid surrounding the membranous labyrinth of rabbit is called:

(a) Endolymph

(b) Perilymph

(c) Haemolymph

(d) Cerebrospinal fluid

► (a) Endolymph

21. By the stimulation of which structure of human ear, the sound waves are perceived by brain :-

(a) Basilar membrane

(b) Tectorial membrane

(c) Meissner's membrane

(d) Sensory hair cells of organ of corti

► (d) Sensory hair cells of organ of corti

22. Which one of the following is not a second messenger in hormone action?

(a) Calcium

(b) cAMP

(c) cGMP

(d) Sodium

► (d) Sodium

23. Which of the following is stirrup shaped ear ossicle

(a) Incus

(b) Stapes

(c) Malleus

(d) Humerus

► (b) Stapes

24. Cretinism is due to abnormal secretion of:

(a) Thyroid stimulating hormone

(b) Thyroxine

(c) Calcitonin

(d) Parathormone

► (b) Thyroxine

25. Who is known as the ‘father of endocrinology’?

(a) Thomas Addison

(b) Pasteur

(c) R. H. Whittaker

(d) Einthoven

► (a) Thomas Addison

26. Harderian gland occurs in:

(a) Whale

(b) Frog

(c) Birds

(d) All the above

► (d) All the above

27. The other name of internal ear is:

(a) Utriculus

(b) Membranous labyrinth

(c) Sacculus

(d) Ductus endolymphaticus

► (b) Membranous labyrinth

28. Which of the following is NOT an endocrine gland?

(a) Salivary gland

(b) Pituitary gland

(c) Parathyroid gland

(d) Pancreas gland

► (a) Salivary gland

29. Goitre is a pathological condition associated with:

(a) Glucagon

(b) Thyroxine

(c) Progesterone

(d) Testosterone

► (b) Thyroxine

30. The aperture controlling the light entering in eye is called:

(a) Iris

(b) Pupil

(c) Blind spot

(d) Sclerotic layer

► (b) Pupil

31. Philips collip discovered which of the following hormones:

(a) Parathyroid hormone

(b) Thyroxine

(c) A.D.H.

(d) Oxytocin

► (a) Parathyroid hormone

32. How many semicircular canals are found in internal ear of  rabbit:

(a) Two

(b) Three

(c) Four

(d) One

► (b) Three