The outermost layer of brain is
pia mater
dura mater
arachnoid
none of these
Correct Answer :
B. dura mater
Related Questions
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
Spinal cord is protected by
aorta
sternum
trachea
vertebral column
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
Which one of the following are purely motor nerves?
Olfactory, trochlear, abducens
Trigeminal, facial, auditory
Vagus, facial, abducens
Abducens, trochlear, oculomotor
The nodes of Ranvier are responsible for]
saltatory conduction
speed of conduction
reflex actions
direction of propagation of impulses
Balance of muscle coordination is the function of
cerebellum
medulla
pons
diencephalon
The autonomic nervous system controls
muscle contractions
reflex movement and equilibrium
activity of visceral organs
both (a) and (b)
Mammalian heart is innervated by a branch of
trigeminal
facial
vagus
spinal accessory
In mammals the function of sympathetic nervous system is
contraction of hair muscles
contraction of pupil
stimulation of sweat glands
acceleration of heart beats
The largest cranial nerve is
optic
facial
vagus
mandibular
Which of the cranial nerve is mixed :
Optic
Olfactory
Vagus
Trochlear
Spinal cord is a part of
CNS
SA node
AV node.
Parasympathetic nervous system
Body temperature, hunger and water balance is regulated by
hypothalamus
medulla oblongata
pons
cerebellum
Voluntary control over skeletal muscles originates in the
cerebellum
cerebrum
medulla oblongata
none of these
In frog purely sensory nerves are
I and II
II and III
I and III
III and IV
The brain is situated in a long case called the
cranium
atrium
sinus
both (a) and (b)
The anterior choroid plexus is situated in the roof of
diocoel (III Ventride)
metacoel (IV Ventride)
olfactocoel
optocoel
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 chemical transmitter of nerve impulses is
cholinesterase
acetyl CoA
acetylcholine
adrenaline
Synaptic fatigue is due to
release of more adrenalin
release of more acetylcholine
exhaustion of neurotransmitter
none of these
Arborvitae includes
grey matter
white matter
both (a) and (b)
none of these
Sensory nerve fibres enter the spinal cord through
dorsal root
ventral root
cranial nerves
central canal
Corpus callosum of the brain connects
optic chiasma
two cerebral hemispheres
two olfactory lobes
two optic lobes
Functionally the parasympathetic system is
inhibitory
stimulatory
both (a) and (b)
at times inhibitory and at times stimulatory
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
White matter consists of
nerve fibres with myelinated sheath
nerve fibres without myelinated sheath
scattered areolar tissue
nerve fibres with blood vessels.
The intensity of stimulus determines the
amplitude of action potentials in the neuron
amplitude and frequency of action potentials in a neuron
frequency of action potentials in a neuron
amplitude of resting and action potentials in a neuron
An afferent neuron is
motor
sensory
both (a) and (b)
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
Cranial and spinal nerves constitute
CNS
autonomic nervous system
peripheral nervous system
sympathetic nervous system