Classification Of Nervous System

Question 1

No of cranial nerves in reptiles, birds,mammals

Answer 1

12 pairs

Question 2

No of cranial nerves in pisces and amphibia

Answer 2

10 pairs

Question 3

No of spinal nerves in humans

Answer 3

31 pairs

Question 4

No of spinal nerves in frog

Answer 4

30 pairs

Question 5

Somatic nervous system supply to

Answer 5

Skeletal muscles

Question 6

Sensory afferent neurons

Answer 6

Arrive at CNS
body parts to CNS

From receptors to CNS

Question 7

Motor or efferent neurons

Answer 7

Exit from CNS
CNS to body parts

CNS to effectors

Question 8

Atonomic nervous system supplies to

Answer 8

Smooth muscles
glands
Blood vessels
involuntary organs

Question 9

Sensory cranial nerves

Answer 9

1,2,8

Question 10

Motor cranial nerves

Answer 10

3,4,6,11,12

Question 11

Mixed cranial nerves

Answer 11

5,7, 9,10

Question 12

Olfactory 1

Answer 12

Sensory nerve
Olfaction smell

Question 13

Optic 2

Answer 13

Sensory
Eye vision

Question 14

Occulomotor 3

Answer 14

motor
Eyeball muscle movement

Question 15

Troclear 4

Answer 15

Eye motor

Question 16

Parasypayhetic division

Answer 16

Conserves energy
promote non emergancy functions

Question 17

Nervous tissue is originated from

Answer 17

Ectoderm

Question 18

Which organell is absent in cell body of neuron

Answer 18

Centriol
except centriole all others are present

Question 19

Why cell division is absent in neuron

Answer 19

Centriol is absent

Question 20

Grey mater

Answer 20

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

Question 21

White mater

Answer 21

Myelinated neurons
inner part of brain
outer of spi chord

Question 22

Collection of cytons is called

Answer 22

Nuclei in cns
ganglia outside cns

Question 23

Unipolor

Answer 23

1axon
embryo

Question 24

Bipolar

Answer 24

1axon 1dendrite

Olfactory epithelium

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

Question 25

Pseudopolar

Answer 25

Dorsal root ganglia of spinal cord

Question 26

Stimulatory or exitatory neurotransmittors

Answer 26

Adrenaline or epinephrin
Noradrenaline or non epinephrin
Acetylcholin

Question 27

Inhibitory neurotransmittors

Answer 27

GABA (gama amino butyric acid)
serotonin
dopamin
glycine

Question 28

Formation of BBB (blood brain barrier)

Answer 28

Astrocyte

Question 29

Resting potential is maintained by

Answer 29

Active transport and passive diffusion of ions

Question 30

Threshold potential

Answer 30

-55 to -60 mv

Question 31

Hyperpolarisation

Answer 31

-85 mV

Question 32

Synapse

Answer 32

Presynaptic knob + synaptic cleft + postsynaptic membrane

Question 33

Electrical synapse

Answer 33

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

Electrical synapses are rare in our system

Question 34

Conduction of nerve impulse is

Answer 34

Unidirectional

Question 35

Magnitude of nerve impulse is same irrespective of stregnth of stimulus

Answer 35

Velocity of nerve impulse is directly proportional to diameter of neuron

This velocity is affected by physical and chemical factors

Question 36

Trigeminal

Answer 36

5
Mixed

Thickest / largest not longest
Dentist nerve

Teeth and jaw muscles (mastication)

3 branches
opthalmic
maxillary, mandibular

Question 37

Abdulscence

Answer 37

6
motor
eyeball muscle

Question 38

Facial

Answer 38

7
mixed

Facial muscles
expressions
anterior ⅔rd part of the tongue

Question 39

Auditory

Answer 39

8
sensory
Ear (hearing)

Question 40

Glossopharengeal

Answer 40

9
Mixed

Tongue, pharynx

Question 41

Vegus (pneumogastric)

Answer 41

10
mixed

Longest nerve

Visceral sensations and movements

Question 42

Accesory spinal

Answer 42

11
Motor
movement of pharynx , larynx

Question 43

Hypoglossal

Answer 43

12
motor
movement of tongue supplies under the tongue