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
Correct Answer :
B. release of adrenalin
Related Questions
In mammals, the cerebral hemispheres are joined by
foramen magnum
corpus callosum
corpus spongiosum
corpora quadrigemina
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
Which one of the following are purely motor nerves?
Olfactory, trochlear, abducens
Trigeminal, facial, auditory
Vagus, facial, abducens
Abducens, trochlear, oculomotor
The outermost layer of brain is
pia mater
dura mater
arachnoid
none of these
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
An afferent neuron is
motor
sensory
both (a) and (b)
none of these
White matter consists of
nerve fibres with myelinated sheath
nerve fibres without myelinated sheath
scattered areolar tissue
nerve fibres with blood vessels.
Spinal cord is protected by
aorta
sternum
trachea
vertebral column
Which one of the animals has a nervous system but no brain?
Amoeba
Earthworm
Cockroach
Hydra
The chemical transmitter of nerve impulses is
cholinesterase
acetyl CoA
acetylcholine
adrenaline
Sensory nerve fibres enter the spinal cord through
dorsal root
ventral root
cranial nerves
central canal
Functionally the parasympathetic system is
inhibitory
stimulatory
both (a) and (b)
at times inhibitory and at times stimulatory
In frog purely sensory nerves are
I and II
II and III
I and III
III and IV
Which of the following tissues in a human being uses the greatest amount of energy per unit weight ?
Heart tissue
Nervous tissue
Muscle tissue
Epithelial tissue
Cranial and spinal nerves constitute
CNS
autonomic nervous system
peripheral nervous system
sympathetic nervous system
Which of the cranial nerve is mixed :
Optic
Olfactory
Vagus
Trochlear
The second cranial nerve is
optic
trigeminal
olfactory
abducen
Spinal cord is a part of
CNS
SA node
AV node.
Parasympathetic nervous system
Mammalian heart is innervated by a branch of
trigeminal
facial
vagus
spinal accessory
Balance of muscle coordination is the function of
cerebellum
medulla
pons
diencephalon
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 energy required for the transmission of impulse is obtained from
stimulating agent
brain
nerve fibre
synapses
The brain is situated in a long case called the
cranium
atrium
sinus
both (a) and (b)
Birds can move swiftly and accurately in three dimensions of space due to well developed
cerebrum
cerebellum
pons varolii
medulla oblongata
Synaptic fatigue is due to
release of more adrenalin
release of more acetylcholine
exhaustion of neurotransmitter
none of these
The smallest cranial nerve is
optic
olfactory
auditory
abducens
The largest cranial nerve is
optic
facial
vagus
mandibular
Body temperature, hunger and water balance is regulated by
hypothalamus
medulla oblongata
pons
cerebellum