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Neural Control And Coordination > Classification Of Nervous System > Flashcards

Classification Of Nervous System Flashcards

1
Q

No of cranial nerves in reptiles, birds,mammals

A

12 pairs

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2
Q

No of cranial nerves in pisces and amphibia

A

10 pairs

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3
Q

No of spinal nerves in humans

A

31 pairs

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4
Q

No of spinal nerves in frog

A

30 pairs

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5
Q

Somatic nervous system supply to

A

Skeletal muscles

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6
Q

Sensory afferent neurons

A

Arrive at CNS
body parts to CNS

From receptors to CNS

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7
Q

Motor or efferent neurons

A

Exit from CNS
CNS to body parts

CNS to effectors

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8
Q

Atonomic nervous system supplies to

A

Smooth muscles
glands
Blood vessels
involuntary organs

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9
Q

Sensory cranial nerves

A

1,2,8

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10
Q

Motor cranial nerves

A

3,4,6,11,12

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11
Q

Mixed cranial nerves

A

5,7, 9,10

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12
Q

Olfactory 1

A

Sensory nerve
Olfaction smell

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13
Q

Optic 2

A

Sensory
Eye vision

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14
Q

Occulomotor 3

A

motor
Eyeball muscle movement

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15
Q

Troclear 4

A

Eye motor

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16
Q

Parasypayhetic division

A

Conserves energy
promote non emergancy functions

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17
Q

Nervous tissue is originated from

A

Ectoderm

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18
Q

Which organell is absent in cell body of neuron

A

Centriol
except centriole all others are present

19
Q

Why cell division is absent in neuron

A

Centriol is absent

20
Q

Grey mater

A

Consist of cyton and non medullated nerve fibres
Outer part of the brain
Inner part of the spinal cord

21
Q

White mater

A

Myelinated neurons
inner part of brain
outer of spi chord

22
Q

Collection of cytons is called

A

Nuclei in cns
ganglia outside cns

23
Q

Unipolor

A

1axon
embryo

24
Q

Bipolar

A

1axon 1dendrite

Olfactory epithelium

Retina
rods and cones (modified bipolar neurons)
bipolar neuron layer of retina

25
Q

Pseudopolar

A

Dorsal root ganglia of spinal cord

26
Q

Stimulatory or exitatory neurotransmittors

A

Adrenaline or epinephrin
Noradrenaline or non epinephrin
Acetylcholin

27
Q

Inhibitory neurotransmittors

A

GABA (gama amino butyric acid)
serotonin
dopamin
glycine

28
Q

Formation of BBB (blood brain barrier)

A

Astrocyte

29
Q

Resting potential is maintained by

A

Active transport and passive diffusion of ions

30
Q

Threshold potential

A

-55 to -60 mv

31
Q

Hyperpolarisation

A

-85 mV

32
Q

Synapse

A

Presynaptic knob + synaptic cleft + postsynaptic membrane

33
Q

Electrical synapse

A

Transmission of impulse across an electrical synapse is very similar to impulse conduction along a single axon

Electrical synapses are rare in our system

34
Q

Conduction of nerve impulse is

A

Unidirectional

35
Q

Magnitude of nerve impulse is same irrespective of stregnth of stimulus

A

Velocity of nerve impulse is directly proportional to diameter of neuron

This velocity is affected by physical and chemical factors

36
Q

Trigeminal

A

5
Mixed

Thickest / largest not longest
Dentist nerve

Teeth and jaw muscles (mastication)

3 branches
opthalmic
maxillary, mandibular

37
Q

Abdulscence

A

6
motor
eyeball muscle

38
Q

Facial

A

7
mixed

Facial muscles
expressions
anterior ⅔rd part of the tongue

39
Q

Auditory

A

8
sensory
Ear (hearing)

40
Q

Glossopharengeal

A

9
Mixed

Tongue, pharynx

41
Q

Vegus (pneumogastric)

A

10
mixed

Longest nerve

Visceral sensations and movements

42
Q

Accesory spinal

A

11
Motor
movement of pharynx , larynx

43
Q

Hypoglossal

A

12
motor
movement of tongue supplies under the tongue

Neural Control And Coordination (7 decks)

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