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4

The SNS works through

A. acetylcholine

B. norepinephrine

C. noradrenaline

D. none of these

Correct Answer :

B. norepinephrine


Related Questions

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4

Spinal cord is a part of

A. CNS

B. SA node

C. AV node.

D. Parasympathetic nervous system

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4

Which one is not at reflex action ?

A. Obeying an order

B. Release of saliva seeing sweets

C. Perspiration due to heat

D. Closing of eyelids against fricking

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4

Balance of muscle coordination is the function of

A. cerebellum

B. medulla

C. pons

D. diencephalon

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4

An afferent neuron is

A. motor

B. sensory

C. both (a) and (b)

D. none of these

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4

Which one of the animals has a nervous system but no brain?

A. Amoeba

B. Earthworm

C. Cockroach

D. Hydra

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4

The nodes of Ranvier are responsible for]

A. saltatory conduction

B. speed of conduction

C. reflex actions

D. direction of propagation of impulses

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4

Mammalian heart is innervated by a branch of

A. trigeminal

B. facial

C. vagus

D. spinal accessory

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4

The outermost layer of brain is

A. pia mater

B. dura mater

C. arachnoid

D. none of these

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4

Nerve impulse is

A. carried by afferent and efferent branches

B. not carried by afferent and efferent branches

C. carried away and brought by efferent branches

D. brought by afferent and carried by efferent branches

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4

Arborvitae includes

A. grey matter

B. white matter

C. both (a) and (b)

D. none of these

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4

The anterior choroid plexus is situated in the roof of

A. diocoel (III Ventride)

B. metacoel (IV Ventride)

C. olfactocoel

D. optocoel

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4

The energy required for the transmission of impulse is obtained from

A. stimulating agent

B. brain

C. nerve fibre

D. synapses

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4

Cerebral cortex has centres of

A. thinking and intelligence

B. memory and learning

C. speech articulation

D. all of these

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4

The intensity of stimulus determines the

A. amplitude of action potentials in the neuron

B. amplitude and frequency of action potentials in a neuron

C. frequency of action potentials in a neuron

D. amplitude of resting and action potentials in a neuron

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4

Which of the following tissues in a human being uses the greatest amount of energy per unit weight ?

A. Heart tissue

B. Nervous tissue

C. Muscle tissue

D. Epithelial tissue

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4

Birds can move swiftly and accurately in three dimensions of space due to well developed

A. cerebrum

B. cerebellum

C. pons varolii

D. medulla oblongata

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4

The chemical transmitter of nerve impulses is

A. cholinesterase

B. acetyl CoA

C. acetylcholine

D. adrenaline

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4

Voluntary control over skeletal muscles originates in the

A. cerebellum

B. cerebrum

C. medulla oblongata

D. none of these

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4

The smallest cranial nerve is

A. optic

B. olfactory

C. auditory

D. abducens

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Which one of the following are purely motor nerves?

A. Olfactory, trochlear, abducens

B. Trigeminal, facial, auditory

C. Vagus, facial, abducens

D. Abducens, trochlear, oculomotor

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4

The second cranial nerve is

A. optic

B. trigeminal

C. olfactory

D. abducen

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The largest cranial nerve is

A. optic

B. facial

C. vagus

D. mandibular

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4

The number of spinal nerves in man is

A. 20 pairs

B. 31 pairs

C. 21 pairs

D. 35 pairs

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4

Corpus callosum of the brain connects

A. optic chiasma

B. two cerebral hemispheres

C. two olfactory lobes

D. two optic lobes

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4

Sensory nerve fibres enter the spinal cord through

A. dorsal root

B. ventral root

C. cranial nerves

D. central canal

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Which of the cranial nerve is mixed :

A. Optic

B. Olfactory

C. Vagus

D. Trochlear

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4

White matter consists of

A. nerve fibres with myelinated sheath

B. nerve fibres without myelinated sheath

C. scattered areolar tissue

D. nerve fibres with blood vessels.

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4

The basic anatomic and physiologie unit of the nervous system is

A. nerves

B. neuron

C. nephron

D. brain

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All or none law of nerve impulse conduction states that

A. an impulse will continue to be conducted until the stimulus is removed

B. 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

C. the brain receives the complete information or does not receive at all

D. none of these

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Synaptic fatigue is due to

A. release of more adrenalin

B. release of more acetylcholine

C. exhaustion of neurotransmitter

D. none of these