Fill In The Blanks of Nervous And Sensory System

1      Name the chief structural and functional units of the nervous system._______

2      Name the chemical signals which are slower, and initiate and widespread, prolonged

response often in a variety of tissues.______

3      Name the study of structures associated with irritability. ______

4      Name the part of the neuron, which carries impulse towards cell body._______

5      What is found between afferent and efferent neurons?_______

6 Name the neuron that conducts an impulse from a receptor organ to the CNS______________.

7      Name the neuron that transmits impulses from the CNS to an effector, such as a

muscle or gland._______

8      Name the neuron that function as integrating centre, located between           sensory

neuron and a motor neuron.________

9 Name the neuron which secrete neurohormones.___________

10 Name the lipoprotein material that forms a sheathlike covering around some nerve_______

11 Name the fiber that conducts a nerve impulse away from a neuron cell body___________.

12 Name the nerve fiber that transmits impulses toward a neuron cell body._________

13 Name the portion of a nerve cell that includes a cytoplasmic mass and a nucleolus,

and from which the nerve fibers extend._______

14 Name the cell that surrounds a fiber of a peripheral nerve and forms the

neurolemmal sheath and myelin._______

15 Name the regular gaps in a myelin sheath around a nerve fiber. ________

16 Name the potential difference that results from the separation of charges along the

plasma membrane of a neuron or other excitable cell._______

17 Resting membrane potential disappears and is replaced by a new potential Name

that potential. _______

18 Impulses travel much more rapidly along which neurons? ________

19 Which sheath of neuron is particularly good conductor of electric impulse?_______

20 What can be the maximum length of a nerve fibre?________

21 At which rate nerve fibre can transmit impulses.________

22 Name the longest cell in our body.________

23 Name the active transport mechanism that concentrates sodium ions on the outside of a plasma membrane and potassium ions on the inside of the membrane_____________.

24 Name the stimulus that is strong enough to initiate an impulse__________.

25 Name the phenomenon in which an electric charge or polarity is lost on the surface

of a membrane.________

26 What is the measuring unit of resting membrane potential?_________

27 What is the normal resting membrane potential?_________

28 Name the sequence of electrical changes when a nerve cell membrane is exposed

to a stimulus that exceeds its threshold._______

29 Name the time period following stimulation during which a neuron or muscle fiber

cannot respond to a stimulus.________

30 Name the phenomenon in which a muscle fiber contracts completely when it is

exposed to a stimulus of threshold strength._______

31 From where the action potentials are generated._________

32 Name the type of nerve impulse conduction in which the impulse seems to jump

from one neurofibril node to the next._______

33 Name the tiny swelling on the terminal end of telodendria at the distal end of an ________

34 Name the junction between the axon of one neuron and the dendrite of another

neuron or effector cell.________

35 Name the space (junction) between the end bulbs and the dendrite of the next________

36 Name the neuron carrying the action potential toward a synapse.________

37 Name the chemical substance that the terminal end of an axon secetes that either stimulates or inhibits a muscle fiber contraction or an impulse in another neuron___________.

38 Name the synapse at which neurotransmitters that one neuron releases diffuse

across an extracellular gap to influence a second neuron’s activity.______

39 Name the neurotransmitter that certain neurons liberate. It is excitatory at

neuromuscular junctions and inhibitory at other synapses._______

40 Name the catecholamine neurotransmitter released from the axon ends of some

nerve fibers. _______

41 In the anterior region of the body of Planaria, there is a bilobbed mass composed of

how many ganglia?_______

42 Name the toxin that is poisonous to or destroys nerve tissue._______

43 Name a diffuse, two-demensinal plexus of bi-or multipolar neurons found in

cnidarian. The simplest pattern of invertebrate nervous system.______

44 Name the group of nerve cell bodies outside the central nervous system._______

45 Which invertebrate has the largest diameter of axon i.e. over ‘I mm?________

46 Carbohydrate, protein and fat metabolisms are controlled by which part of the brain._____________

47 Name the second cranial nerve._________

48 Name the thermoregulatory centre in human brain___________.

49 What is the main function of cerebellum?_________

50 Name the longest cranial nerve that supplies regions of body other than head____________.

51 Name the parts of brain which has the primary sensory and motor areas.________

52 Name the system under which heart-beat is controlled. _________

53-Name the structure formed by the union of thick ventral rami of 71h, a 98 and 10th pairs of spinal nerves.

54 Name the response that is under cerebral control and aimed to achieve definite_______

55 Name the responses in our internal organs without any knowledge to animal_____________.

56 Where the sensory ganglion connected with reflex action are located?________

57 Name a rodlike, supportive structure that runs along the dorsal midline of all larval

chordates and many adult chordates._______

58 Name the bundle of nerve fibers within the central nervous system.________

59 Name the group of three membranes that covers the brain and spinal cord.________

60 Name the outermost and toughest meninx covering the brain and spinal cord____________.

61 Name the weblike middle covering (meninx) of the CNS.______

62 Name the innermost meninx that is in direct contact with the brain and spinal cord___________.

63 Name the inferior-most portion of the brain stem between the pons and spinal cord______________.

64 Name the portion of the brain that coordinates skeletal muscle movement.________

65 Name the portion of the brain stem above the medulla oblongata and below the_______

66 Which group (invertebrates or vertebrates) posses georeceptors, hygroreceptors, proprioreceptors, baroreceptors, chemoreceptors, thermoreceptors,chemoreceptors?_______

67 Sensory receptors are cells that can convert environmental stimuli into what?_____________.

68 Tactile receptors are sensitive to what stimulus?_________

69 Which type of receptors are sensitive to pull of gravity?_______

70 Which receptors detect water content of air?________

71 Which receptors respond to mechanically induced changes caused by bending,

tension etc?________

72 Phonoreceptors are sensitive to what?________

73 What receptros respond to pressure changes?________



74 What receptors respond to air and water borne chernicals?_________

75 Photoreceptors are sensitive to what stimulus?___

76 All receptors are ; that is, they convert one form of energy into other.

77 Sensilla in arthropods are?_____

78 Which sex attractant is secreted by female Bombyx mon’?_

79 Crickets, grasshoppers and cicadas possess phonoreceptors called.__

80 Most arachnids possess phonoreceptors in their cuticle called._

81 Centipedes have phonoreceptors called.____

82 Mass of bright red photoreceptor granules in Euglena is called.

83 Ocelli contain light sensitive cells called.____

84 Ocelli are photoreceptors found in invertebrate phyla mollusca, arthropod, and_____________.

85 Compound eyes in insects consist of many (thousands) distinct units called, what?________________.

86 Compound eyes are found mong invertebrates in bivalve molluscs, arthropods, and________________

87 Complex camera eyes among invertbrates are found in which groups?

88 In which medium, air or water, sound travels both faster and farther?

89 Electroreceptors in Scoliodon, and many fishes, some amphibians, and platypus are______

90 On what region of body of a fish, head or trunk, neuromasts are not present?________________.

91 Which functional unit/units (auditory/ vestibular) are present in human ear?_______________

92 In which group of animals tympanum or tempanic membrane first evoluved?______________

93 Between which two parts of vertebrate ear oval window is located?

94 Name the ossicles in human ear.____

95 What is the name of component of inner ear which is concerned with hearing?___________

96 Whether in frogs, matig calls are of high or low frequency sound?

97 Which component of ear senses equilibrium and balance in vertebrates?

98 Humans can hear sounds within a range of.___

99 What is the name of sensory receptor in man that responds to pain, severe heat,cold, chemicals?_____

100 Which organ in rattle snakes and other pit vipers have heat sensitive receptors?_______________

101 Which are the receptors on skin sensitive to light touch?_______

102 Mechanoreceptors in skin of human beings are called. __________

103 Pacinian corpuscles are receptors for which stimulus?  ___________

104 Organs of Ruffini are receptors for which sense.___

105 Bats, shrews, whales, and dolphins can determine distance and depths by a form of

echolocation called._____

106 Jacobson’s (vomeronasal) organs are best developed in which animals?___

107 Reptiles and birds have no taste buds on their tongues, instead in what organ?_______________

108 Which animals have taste buds on skin?_____

109 Name the clear fluid that fills anterior and posterior chambers of the eye ball._____________

110 Name the process of focusing the light rays precisely on retina. __

111 Name the transparent membrane which is moveable and cleans and protects the

eye in birds and other vertebrates.____

112 Name the reptile which has a complete median eye with lens, nerves, and retina._______________

113 Name the photoreceptor cells in retina. ____

114 Name the light absorbing pigment in .rods of retina of eye._______.


  1. neurons.
  2. hormones.
  3. neurology:
  4. dendron.
  5. interneuron.
  6. sensory neuron (receptor or afferent).
  7. motor (effector or efferent) neuron. B
  8. . interneuron.
  9. neurosecretory.
  10. myelin.
  11. axon
  12. dendrite
  13. cell body.
  14. neurolemmocyte
  15. neurofibril node.
  16. resting membrane potential
  17. active membrane potential.
  18. myelinated neurons.
  19. myelin sheath
  20. 10 meter.
  21. 130 meter per second.
  22. nerve cell.
  23. sodium-potassium ATPase pump.
  24. threshold stimulus.
  25. depolarization
  26. millivolts (my).
  27. about -70 my.
  28. action potential.
  29. refractory period.
  30. all-or-none law.
  31. neurofibril nodes.
  32. saltatory conduction.
  33. end bulb (synaptic button/knob)
  34. synapse
  35. synaptic cleft.
  36. presynaptic neuron
  37. neurotransmitter
  38. chemical synapse.
  39. acetylcholine.
  40. norepinephrine.
  41. two
  42. neurotoxin
  43. nerve net
  44.  ganglion.
  45.  loligo.
  46.  hypothalamus.
  47. optic nerve
  48.  hypothalamus.
  49. co-ordination of voluntary activities.
  50. vagus nerve
  51. cerebral cortex
  52. autonomic system
  53. cauda equina
  54. voluntary response
  55. autonomic reaction
  56. dorsal root
  57.  notochord.
  58.  tract.
  59.  meninges.
  60. dura mater.
  61.  arachnoid.
  62. pia mater
  63. medulla oblongata.
  64.  cerebellum.
  65.  pons.
  66.  invertebrates.
  67. nerve impulse
  68.  touch
  69.  georeceptoes
  70.  hygroreceptors
  71.  proprioreceptros
  72.  sound
  73.  baroreceptors
  74.  chemoreceptors
  75.  light
  76.  transducers
  77.  chemoreceptors
  78.  bobykol
  79. tympanic or tympanal organs
  80. slit sense organs
  81. organs of tomosvary
  82.  stigma
  83. retinular cells
  84. annelida
  85.  omatidia
  86.  annelids
  87. squids and octopuses (cephalopods)
  88.  water
  89. ampullary organs
  90. head region
  91. both auditory and vestibular
  92.  amplibians
  93. middle and inner ear
  94. malleus, incus, stapes
  95.  cochlea
  96. high frequency
  97. semicircular canals
  98. 20 – 20000 cycles per second
  99.  nociceptors
  100. pit organs
  101. bare nerve endings and tactile corpuscles
  102. bulbs of krause
  103. touch and pressure
  104. touch/ pressure
  105. sonar or biosonar
  106. snakes and lizards
  107.  pharynx
  108. amphibia and fishes
  109. aqueous humor
  110.  accomodation
  111. nictitating membrane
  112. tuatara (Sphenodon)
  113. rods and cones
  114. rhodopsin

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