The brain is situated in a long case called the
cranium
atrium
sinus
both (a) and (b)
Correct Answer :
A. cranium
Related Questions
Arborvitae includes
grey matter
white matter
both (a) and (b)
none of these
Birds can move swiftly and accurately in three dimensions of space due to well developed
cerebrum
cerebellum
pons varolii
medulla oblongata
The largest cranial nerve is
optic
facial
vagus
mandibular
The thermoregulatory centre of the body is
spinal cord
hypothalamus
cerebellum
pituitary gland
Which one is not at reflex action ?
Obeying an order
Release of saliva seeing sweets
Perspiration due to heat
Closing of eyelids against fricking
The nodes of Ranvier are responsible for]
saltatory conduction
speed of conduction
reflex actions
direction of propagation of impulses
Cerebral cortex has centres of
thinking and intelligence
memory and learning
speech articulation
all of these
Spinal cord is a part of
CNS
SA node
AV node.
Parasympathetic nervous system
The outermost layer of brain is
pia mater
dura mater
arachnoid
none of these
Mammalian heart is innervated by a branch of
trigeminal
facial
vagus
spinal accessory
An afferent neuron is
motor
sensory
both (a) and (b)
none of these
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
Which of the cranial nerve is mixed :
Optic
Olfactory
Vagus
Trochlear
The energy required for the transmission of impulse is obtained from
stimulating agent
brain
nerve fibre
synapses
The autonomic nervous system controls
muscle contractions
reflex movement and equilibrium
activity of visceral organs
both (a) and (b)
Which one of the animals has a nervous system but no brain?
Amoeba
Earthworm
Cockroach
Hydra
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
The chemical transmitter of nerve impulses is
cholinesterase
acetyl CoA
acetylcholine
adrenaline
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
Stimulation of sympathetic nerve of heart accelerates the heart beats as a result of
release of acetylcholin
release of adrenalin
release of heparin
inhibition of cholinesterase
Functionally the parasympathetic system is
inhibitory
stimulatory
both (a) and (b)
at times inhibitory and at times stimulatory
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
Synaptic fatigue is due to
release of more adrenalin
release of more acetylcholine
exhaustion of neurotransmitter
none of these
Body temperature, hunger and water balance is regulated by
hypothalamus
medulla oblongata
pons
cerebellum
Which one of the following are purely motor nerves?
Olfactory, trochlear, abducens
Trigeminal, facial, auditory
Vagus, facial, abducens
Abducens, trochlear, oculomotor
The SNS works through
acetylcholine
norepinephrine
noradrenaline
none of these
Cranial and spinal nerves constitute
CNS
autonomic nervous system
peripheral nervous system
sympathetic nervous system
The brain is situated in a long case called the
cranium
atrium
sinus
both (a) and (b)
Sensory nerve fibres enter the spinal cord through
dorsal root
ventral root
cranial nerves
central canal