OBJECTIVES OF NERVOUS AND SENSORY SYSTEMS

1- Which of the following are the integrative systems in our body?

(a)   nervous system

(b)   endocrine system

(c)    both of these

(d)   none of these

2. Nervous system in organisms, in general serve to

(a)   regulate and control the activities of different organs in the body.

(b)   link and coordinate the activities of various organs to ensure the intigrity of the animal.

(c)    help the organs to maintain unity with the environment.

(d)   all of these functions.

  1. The important properties of neurons

(a)   excitability

(b)   conductivity

(c)    both a and b

(d)   none of these.

  1. Functionally neurons may be:

(a)   afferent that carry impulses from periphery of the body to CNS.

(b)   efferent that carry impulses from
CNS to the efferent organs.

(c)    both of these types.

(d)   none of these types.

5. The elements of nervous system which help in co-ordination are: •

(a)   receptors

(b)   neurons.

(c)    effectors

(d)   all of these.

  1. Which is/are the main type/types of

nervous system?

(a)   Diffused and ganglionic nervous system.

(b)   Diffused and centralized nervous system.

(a)   Both a and b

(b)   none of these.

7. Routing of signals to one of several alternative circuits, amplification of certain signals while reduction of others, integration of signals from diffuse sources, learning etc, are performed by?

(a)   interneurons.

(b)   synapses.

(c)    neuromuscular junctions

(d)   none of these.

  1. The distal ends of which of these neurons lie

adjacent to blood stream?

(a)   afferent neurons

(b)   efferent neurons

(c)    interneurons

(d)   neurosecretory neurons.

  1. Functional junction between dendritic region

of one neuron or nerve axon ending of other

neuron is termed

(a)   synapse.

(b)   motor end plate

(c)    neuromuscular junction

(d)   none of these.

10. The electrical potential that cell membrane is exists across a

(a)   resting membrane potential

(b)   active membrane potential

(c)    automatic potential

(d)   none of these.

11. A nerve is a

(a)   collection of neurons.

(b)   concentraction of dendrites and axons

(c)    bundles of axons or dendrites of neurons.

(d)   bundle of axons or dendrites bounded by connective tissue.

12. Which of these have excitability

(a)   neurons

(b)   muscle fibres.

(c)    both of these

(d)   none of these

.13-Which of these is a correct statement

(a)    all of the neurons are excitable.

(b)    all of the neurons can transmit impulses across their membrane.

(c)    transmission of nerve impulses is always unidirectional.

(d)   all of these statements

14. The impulses from sense organs are always carried from sense organs to CNS by means of

(a)    dendrites

(b)    axons

(c)    cytons i.e. cell body

(d)   none of these.

15. Impulses from CNS to effectors are always carried by

(a)    dendrites

(b)    axons

(c)    cytons i.e. cell body

(d)   all of these.

16. Dendrites of which type of neuron conduct impulses towards cellbody?

(a)    sensory neuron

(b)    motor neuron

(c)    both of these

(d)   none of these.

17. Conduction of nerve impulse through a nerve fibre is purely

(a)    a physical phenomenon

(b)    a.mechanical phenomenon

(c)    an electrochemical phenomenon

(d)   none of these.

18. An impulse travels along the nerve fibre as a

(a)    self propagative wave of some electrochemical changes.

(b)    self propagative wave of mechanical changes.

(c)    self propagative wave of thermal changes.

(d)   self propagative wave of none of these changes.

19. Conduction of nerve impulse depends upon

(a)    Permeability of surface membrane of axon

(b)    osmotic equilibrium

(c)    electric equivalence between axoplasm and extra cellular fluid.

(d)   all ot these

20. Under the condition of disturbed permeability of surface membrane of axon the nerve impulse will

(a)    conduct normally

(b)    conduct abnormally

(c)    conduct slowly

(d)   conduct first slowly then fastly.

21. How can we disturb the conduction of impulse through a nerve fibre?

(a)    by disturbing the permeability of surface membrane of axon

(b)    by altering the oxmotic equilibrium.

(c)    by disturbing the electrical equivalence

(d)   by all of these processes.

22. Synapse is a gap between adjacent

(a)    muscle cells.

(b)    nerve cells

(c)    muscle fibres

(d)   nerve cell and other cell.

23. An impulse will travel through a nerve fibre only if the membrane becomes more permeable to ions of

(a) chloride                 (b) potassium

(c) calcium                  (d) sodium.

24. Nerve impulse is, infact, a process which is associated with which of these phenomenon.

(a)    electrical

(b)    chemical

(c)    electrochemical

(d)   physical.

25. A nerve which conducts impulses from a tissue to nerve is called

(a) efferent                  (b) afferent

(c) motor                     (d) mixed.

26. A synpase at which local currents resulting from electrical activity flow between two neurons through gap junctions joining them is called

(a)    chemical synapse

(b)    electrical synpase

(c)    synpatic cleft.

(d)   neurotransmitter.

27. Afferent nerve fibres conduct impulses from

(a)    effectors to receptors.

(b)    receptors to effectors.

(c)    receptors to CNS

(d)   CNS to receptors.

28. During conduction of an impulse, electric potential on inside of axolemma (plasma membrane of axon) changes from.

(a)    negative to positive and remain • positive.

(b)    negative to positive and remain negative.

(c)    positive to negative and remain positive.

(d)   positive to positive and remain negative.

29. In the resting stage the axolemma is

(a)    poorly permeable to Na+ ions

(b)    quite permeable to K± and Cl – ions

(c)    impermeable to all these ions

(d)   both of a and b.

30. In resting stage the axolemma is poorly premeable to Na+ ions but quite

permeable to e and CI ions by

(a)    10 — 20 times

(b)    20 — 30 times

(c)    50 — 60 times

(d)   50 — 100 times.

31. Sodium – potassium pump means

(a)    Expelling of Na+ into extracellular

fluid and intake of e from cytoplasm against concentration gradient.

(b)    Expelling of le into extracellular

fluid and intake of Na+ from cytoplasm

(c)    Only expelling of Na+ into extracellular fluid

(d)   Only intake of icf into cytoplasm.

32. Sodium – potassium – pump operates with the help of which of these enzymes.

(a)    Na + – K± ATPase

(b)    phosphatase

(c)    isomerase

(d)   hydrolase.

33. The negative charges over complex organic molecules are neutralized by

(a) potassium ions

(b) sodium ions

(c)    chloride ions

(d)   phosphate ions

34. Sodium-potassium-pump functions mainly to

(a)    maintain osmotic equilibrium between
extracellular fluid and cytoplasm.

(b)    reduce the charges over surface membrane.

(c)    to speed up the propagation of nerve impulse.

(d)   perform none of these.

35. Each cell in resting stage is in polarized state with a membrane potential of

(a) -50 mV                   (b) -60 mV

(c) -70 mV                   (d) + 70 mV

36. The electric potential across membrane of each resting cell is

(a)    phase potential

(b)    action potential

(c)    resting membrane potential

(d)   none of these

37. Saltatory transmission of nerve impulse occurs in the

(a)    myelinated neurons.

(b)    non-myelinated neurons.

(c)    both of these neurons.

(d)   none of these neurons.

38. Synapses between motor fibers and end plates are called.

(a)    internuronal synapses.

(b)    neuromuscular synapses.

(c)    neurosecretory synapses.

(d)   none of these.

39. Cholinergic fibers are those which liberate at their free ends.

(a)    adrenaline

(b)    acetylcholine.


----------------------------


----------------------------

(c)    noradrenaline.

(d)   none of these.

40. Which of these is not a neurohormone.

(a)    acetylcholine.

(b)    norepinephrine.

(c)    epinephrine.

41. Neurohormones inhibiting post-synaptic transmission are

(a)    glycine.

(b)    acetylcholine

(c)    both of these

(d)   none of these.

42. Acetylcholine is responsible for transmission of nerve impulses through

(a) cytons                      (b) dendrites

(c) axons                       (d) synapses.

43. Destruction of acetylcholine by acetylcholinesterase    is   required
because of

(a)   the pesence of acetylcholine on dendrites which will continue to transmit the same impulse.

(b)   it will make farther transmission impossible.       (c)   both of a and b

(d)    none of these.

44. Acetylcholine is

(a)   neuro transmittor across synapses.

(b)   chemical messenger

(c)    antistress hormone.

(d)   none of these.

45. The synapse between two neurons may be

(a)   Chemical synapse

(b)   Electrical synapse

(c)    Both a and b

(d)   none of a and b

46. Most primitive nervous system is found in

(a) Hydra                     (b) Amoeba               

(c) Spong                     (d) earthworm

47. Which of these has a nervous system but no brain

(a) Amoeba                 (b) cockroach

(c) Hydra                      (d) earthworm.

48. The neuron net of Hydra lacks

(a)   neurons

(b)   dendrites

(c)    connections

(d)   direction of impulse flow

49. Hydra possesses

(a)   sensory cells but no nerve cells.

(b)   both sensory and nerve cells.

(c)    neither sensory nor nerve cells.

(d)   nerve cells but no sensory cells.

50. Nervous system of Hydra is made up of

(a)   polarized nerve cells.

(b)   non-polar nerve cells.

(c)    ganglionated nerve cords.

(d)   well-defined nerves.

51. Nervous system in Hydra is formed by.

(a)   nerve net

(b)   nerve ring

(c)    brain and nerves

(d)   none of these.

52-Number of subpharyngeal ganglia in earthworm is

(a) single                     (b) one pair

(c) two pairs                (d) three pairs

53-Subphatyngeal ganglia in earth worm supply nerves to

(a)   prostomium

(b)   anterior three segments

(c)    segments number 2,3,4

(d)   all of these

54-In earthworms ventral nerve cord has symmetrical ganglia

(a)  in all segments of body

(b)  in all segments behind 4th segment

(c)  9-75 segments only.

(d)  all segments behind clitellum.

55. One segmental ganglia gives out

(a)  one pair of nerves

(b)  two pairs of nerves.

(c)  three pairs of nerves.

(d)  five pairs of nerves.

56-Nerve cord of cockroach consists of which of these numbers of ganglia

(a) 8                            (b) 9

(c) 12                          (d) 7.

57. Nerves to mandibles in cockroach are given by

(a)   brain

(b)   circumoesophageal connective.

(c)    suboespophageal ganglia k frontal ganglia

58-First thoracic ganglia in cockroach gives which number of the nerves

(a) two pairs               (b) three pairs

(c) six pairs                (d) five pairs.

59. Last abdominal ganglia in cockroach gives out which of these number of nerves

(a)   three pairs

(b)   two pairs

(c)    one pair

(d)   none of these

60. Nervous system in vertebrates consists of

(a)   central nervous system

(b)   autonomic nervous system

(c)    peripheral nervous system

(d)   all of these systems.

61. Which one of the following is supreme controller of total body responses.

(a)   autonomic nervous system

(b)   central nervous system

(c)    peripheral nervous system

(d)   none of these.

62. The alkaline and lymph-like serous fluid present inside the cavity of brain and spinal cord is called.

(a)   extra cellular fluid

(b)   tissue fluid

(c)    cerebro-spinal fluid •

(d)   arachnoid fluid

63. Extending from the spinal cord in frog are

(a)   lateral nerve roots

(b)   dorsal nerve roots

(c)    ventral nerve roots

(d)   dorsal and ventral nerve roots

64. Brain and spinal cord in frog are covered with which of the following meniges.

(a) piamater               (b) duramater

(c) both of these         (d) none of
these

65. Arachnoid is present between.

(a)   piamater and duramater

(b)   dura mater and the sheath of overlying bone.

(c)    piamater and brain

(d)   none of these

66. Ventricles present in cerebral hemispheres are called.

(a) paracoel               (b) metacoel

(c) both of these         (d) none of
these

67. Space inside the olfactory lobes is called

(a) paracoel               (b) diocoel

(c) rhinocoel              (d) metacoel.

68. Communication between two paracoels is called

(a)   iter

(b)   foramen of monro

(c)    cura cerebri

(d)   none of tehse.

69. Cavity within the spinal cord is called

(a) neurocoel            (b) blastocoel

(c) enterocoel            (d) schizocoel.

70. The active ingredient in most flea sprays and powders is parathion which prevents breakdown of

(a)   nor epinephrine

(b)   acetylcholine

(c)    acetylcholenesterase

(d)   adrenaline.

71. Outermost covering meninx of brain is.

(a) choroid                 (b) arachnoid

(c) duramater            (d) all of these

72. Cerebral hemispheres are centres of

(a)   thinking

(b)   will power

(c)    reasoning

(d)   all of these.

73. HypothalamuS is formed by

(a)   ventral wall of diencephalon

(b)   root of diencephalon

(c)    sides of diocoel

(d)   none of these.

74. Crura cerebri connect

(a)   fore brain with mid brain

(b)   mid brain with hind brain.

(c)    fore brain with hind brain

(d)   hind brain with spinal cord.

75. Which groups have cerebellum larger than other groups.

(a)   fishes and amphibia

(b)   amphibia and reptilia

(c)    reptilia and birds

(d)   birds and mammals.

76. Which animal’ group has usually a rudimentary crebellum reflecting their simple locomotory pattern.

(a)  fishes

(b)  amphibians

(c)  reptiles

(d)  birds.

77. Seat of highest mental faculties like  nature are consciousness,     intelligence  and     articulate speech in the brain is

(a)   cerebrum            (b)   cerebellum             (d) none of these. (c)   medulla

(d)     none of these.

                                                 ANSWERS

MCQs

12

 

 

Similar Articles:

Latest Comments
  1. VINAY September 23, 2017

Leave a Reply

Your email address will not be published. Required fields are marked *