The smallest cranial nerve is
optic
olfactory
auditory
abducens
Correct Answer :
D. abducens
Related Questions
In frog purely sensory nerves are
I and II
II and III
I and III
III and IV
Foramen of Monro is
gap in pelvic girdle of rabbit
foramen in the skull of frog
space in brain of frog and rabbit
pore in the interauricular septum in a mammalian heart
In mammals, the cerebral hemispheres are joined by
foramen magnum
corpus callosum
corpus spongiosum
corpora quadrigemina
The SNS works through
acetylcholine
norepinephrine
noradrenaline
none of these
The largest cranial nerve is
optic
facial
vagus
mandibular
The energy required for the transmission of impulse is obtained from
stimulating agent
brain
nerve fibre
synapses
The 8th cranial nerve of frog is
auditory
optic
olfactory
glossopharyngeal
The nodes of Ranvier are responsible for]
saltatory conduction
speed of conduction
reflex actions
direction of propagation of impulses
Purely motor nerve is
optic
abducens
ophthalmic
palatinus
The second cranial nerve is
optic
trigeminal
olfactory
abducen
Which of the cranial nerve is mixed :
Optic
Olfactory
Vagus
Trochlear
Balance of muscle coordination is the function of
cerebellum
medulla
pons
diencephalon
The outermost layer of brain is
pia mater
dura mater
arachnoid
none of these
Cranial and spinal nerves constitute
CNS
autonomic nervous system
peripheral nervous system
sympathetic nervous system
The smallest cranial nerve is
optic
olfactory
auditory
abducens
Spinal cord is protected by
aorta
sternum
trachea
vertebral column
The autonomic nervous system controls
muscle contractions
reflex movement and equilibrium
activity of visceral organs
both (a) and (b)
Sensory nerve fibres enter the spinal cord through
dorsal root
ventral root
cranial nerves
central canal
The anterior choroid plexus is situated in the roof of
diocoel (III Ventride)
metacoel (IV Ventride)
olfactocoel
optocoel
Arborvitae includes
grey matter
white matter
both (a) and (b)
none of these
Mammalian heart is innervated by a branch of
trigeminal
facial
vagus
spinal accessory
All or none law of nerve impulse conduction states that
an impulse will continue to be conducted until the stimulus is removed
an impulse will be generated if the stimulus is of a particular strength, below which there won't be any response and increase above the minimal does not produce any enhanced effect
the brain receives the complete information or does not receive at all
none of these
Foramen of Monro provides a passage connecting
brain and spinal cord
lateral ventricles with III ventride in brain
IV ventricle with optic ventride
middle ear with pharynx
The largest number of cell bodies of] neurons in our body is found in
white matter of spinal cord
white matter of brain
grey matter of brain
grey matter of spinal cord
White matter consists of
nerve fibres with myelinated sheath
nerve fibres without myelinated sheath
scattered areolar tissue
nerve fibres with blood vessels.
Nerve impulse is
carried by afferent and efferent branches
not carried by afferent and efferent branches
carried away and brought by efferent branches
brought by afferent and carried by efferent branches
The synaptic knots are present at the terminal endings of
the neuron
the dendron
the axon
both (b) and (c)
Which one of the animals has a nervous system but no brain?
Amoeba
Earthworm
Cockroach
Hydra
The thermoregulatory centre of the body is
spinal cord
hypothalamus
cerebellum
pituitary gland
Functionally the parasympathetic system is
inhibitory
stimulatory
both (a) and (b)
at times inhibitory and at times stimulatory