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4

Synaptic fatigue is due to

A. release of more adrenalin

B. release of more acetylcholine

C. exhaustion of neurotransmitter

D. none of these

Correct Answer :

C. exhaustion of neurotransmitter


Related Questions

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Pia mater and dura mater are referred as

A. hypothalamus

B. crura cerebri

C. cerebrospinal sheath

D. meninges

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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

Foramen of Monro is

A. gap in pelvic girdle of rabbit

B. foramen in the skull of frog

C. space in brain of frog and rabbit

D. pore in the interauricular septum in a mammalian heart

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4

Synaptic fatigue is due to

A. release of more adrenalin

B. release of more acetylcholine

C. exhaustion of neurotransmitter

D. none of these

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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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Spinal cord is a part of

A. CNS

B. SA node

C. AV node.

D. Parasympathetic nervous system

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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

The chemical transmitter of nerve impulses is

A. cholinesterase

B. acetyl CoA

C. acetylcholine

D. adrenaline

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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

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 smallest cranial nerve is

A. optic

B. olfactory

C. auditory

D. abducens

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4

Functionally the parasympathetic system is

A. inhibitory

B. stimulatory

C. both (a) and (b)

D. at times inhibitory and at times stimulatory

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4

In mammals the function of sympathetic nervous system is

A. contraction of hair muscles

B. contraction of pupil

C. stimulation of sweat glands

D. acceleration of heart beats

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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 outermost layer of brain is

A. pia mater

B. dura mater

C. arachnoid

D. none of these

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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

In mammals, the cerebral hemispheres are joined by

A. foramen magnum

B. corpus callosum

C. corpus spongiosum

D. corpora quadrigemina

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An afferent neuron is

A. motor

B. sensory

C. both (a) and (b)

D. none of these

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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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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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Spinal cord is protected by

A. aorta

B. sternum

C. trachea

D. vertebral column

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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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The autonomic nervous system controls

A. muscle contractions

B. reflex movement and equilibrium

C. activity of visceral organs

D. both (a) and (b)

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4

The brain is situated in a long case called the

A. cranium

B. atrium

C. sinus

D. both (a) and (b)

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Arborvitae includes

A. grey matter

B. white matter

C. both (a) and (b)

D. none of these

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4

Which of the cranial nerve is mixed :

A. Optic

B. Olfactory

C. Vagus

D. Trochlear

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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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Foramen of Monro provides a passage connecting

A. brain and spinal cord

B. lateral ventricles with III ventride in brain

C. IV ventricle with optic ventride

D. middle ear with pharynx

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4

The largest cranial nerve is

A. optic

B. facial

C. vagus

D. mandibular