The Nervous System Test

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The Nervous System Test - 11

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Question 1
1 / -0

When we move from dark to light, we fail to see for some time but soon the visibility becomes normal. What is this condition called?

A
Accomodation

B
Adaptation

C
Photoperiodism

D
Mutation

E
Polarisation
Question 2
1 / -0

What are the gaps through out the length of the myelin sheath called?

A
Synaptic clefts

B
Axons

C
Dendron

D
Node of Ranvier

E
Synapse
Question 3
1 / -0

Anesthesia reduces pain by blocking nerve conduction due to

A
blockage of neurotransmitter receptors

B
blockage of Na⁺ channels

C
blockage of K⁺ channels

D
blockage of blood flow in the target organ

E
increasing the blood flow in the target part
Question 4
1 / -0

Which of the following statements is incorrect about nerve impulse?

A
In normal condition, the outer side of the nerve fibre carries positive charge.

B
The condition when outer side of nerve fibre carries normal (+) charge is called depolarized state.

C
Nerve impulse travels at a maximum speed of about 100 metres per second only.

D
Repolarization of nerve takes place due to active transport of Na⁺ ions again to the outside.

E
Conduction of nerve impulse is a wave of depolarization followed by repolarisation.
Question 5
1 / -0

In neurons, axon is surrounded by a white insulating sheath. What is this sheath called?

A
Myelin sheath

B
Neurilemma

C
Node of Ranvier

D
Cyton

E
Dendrite
Question 6
1 / -0

Canal of Schleman is present at the junction of

A
sensory and non-sensory retina

B
choroid and ciliary body

C
sclera and cornea

D
ciliary body and iris

E
iris and cornea
Question 7
1 / -0

What is `jumping of the action potential` at the Nodes of Ranvier called?

A
Recovery phase

B
Active phase

C
Saltatory conduction

D
Neurotransmission

E
Excited phase
Question 8
1 / -0

In mammalian eye, the power of accommodation is controlled by changing the shape of the lens. Which of the following governs it?

A
Cornea

B
Pupil

C
Iris

D
Ciliary body

E
Lens
Question 9
1 / -0

Which of the following prevents the mixing of impulses in the adjacent axons?

A
Myelin sheath

B
Acetylcholine

C
Synaptic cleft

D
Nissil granules

E
Neurilemma
Question 10
1 / -0

Axon terminals are closely placed near the dendrites of other neurons but are not connected. What are such gaps called?

A
Node of Ranvier

B
Excited region

C
Synaptic clefts

D
Dendrite

E
Neurilemma
Question 11
1 / -0

Suppose the terminal ends of axon are in contact with dendrites of four adjacent neurons, the nerve impulse of the axon will

A
travel in one of the neurons because the impulse travels from dendrites of one neuron into the axon of another neuron

B
travel only in one neuron, which is in closest contact and with the same intensity

C
get distributed in all the four neurons resulting in weak impulse

D
travel in all the four neurons

E
travel in only two neurons, which are most closely associated
Question 12
1 / -0

The space between the covering membranes of brain is filled with a watery fluid, which acts like a cushion to protect the brain from shocks. What is this fluid called?

A
Cerebral fluid

B
Cerebrospinal fluid

C
Meningial fluid

D
Synovial fluid

E
Acetylcoline
Question 13
1 / -0

Which of the following is an example of conditioned reflex?

A
Withdrawal of hand on touching a hot surface

B
Sneezing during cold

C
Withdrawal of hand on pricking a needle

D
Salivation in dog on seeing bread

E
Increased heart beat during stress
Question 14
1 / -0

What is the pre-excitation potential difference between outside and inside of a nerve called?

A
Reaction potential

B
Action potential

C
Spike potential

D
Resting potential

E
Jumping potential
Question 15
1 / -0

A frog with crushed brain is pinched on the leg and the leg is drawn away. It is

A
automatic motor response

B
neurotransmitter induced response

C
conditional reflex

D
simple reflex

E
conditional and neurotransmitter induced the response
Question 16
1 / -0

Which of the following chemicals sets a new impulse in the dendrites of the adjacent neuron?

A
Epinephrine

B
Acetylcholine

C
Nor-epinephrine

D
Neurilemma

E
Adrenaline
Question 17
1 / -0

Which of the following statements is not correct?

A
Optic nerve arising from the eye and ending in the brain is called mixed nerve.

B
A nerve arising from brain and supplying blood to the muscles of the eyeball for rotating the eye is a motor nerve.

C
The myelin sheath acts like an insulation.

D
A wave of irritability is called an impulse.

E
Acetylcholine sets a new impulse in the dendrites of the adjacent neuron.
Question 18
1 / -0

What is the sheet of fibres connecting the two cerebral hemispheres called?

A
Corpus callosum

B
Meninges

C
Frontal lobe

D
Diencephalon

E
Synaptonemal cleft
Question 19
1 / -0

Which of the following is true about association neurons?

A
They convey the impulse from receptor to the brain.

B
They carry impulse from the main nervous system to an effector.

C
They interconnect the sensory and motor neurons.

D
They conduct depolarization impulse.

E
They convey the impulse from receptor to an effector.
Question 20
1 / -0

During development of action potential in a nerve fibre, why are the positive and negative charges on outer and inner sides of axon membranes reversed?

A
Due to movement of K⁺ ions out of the axon.

B
As more K⁺ ions enter the axon than Na⁺ ions leave the same.

C
As more Na⁺ ions enter the axon than K⁺ ions leave the same.

D
Due to all Na⁺ ions entering the axon.

E
Due to high concentration of Cl^-ions.

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Re-Attempt Weekly Quiz Competition

The Nervous System Test - 11

Result

The Nervous System Test - 11

Score

-

Rank

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SHARING IS CARING

Question 1

Accomodation

Adaptation

Photoperiodism

Mutation

Polarisation

Question 2

Synaptic clefts

Axons

Dendron

Node of Ranvier

Synapse

Question 3

blockage of neurotransmitter receptors

blockage of Na+ channels

blockage of K+ channels

blockage of blood flow in the target organ

increasing the blood flow in the target part

Question 4

In normal condition, the outer side of the nerve fibre carries positive charge.

The condition when outer side of nerve fibre carries normal (+) charge is called depolarized state.

Nerve impulse travels at a maximum speed of about 100 metres per second only.

Repolarization of nerve takes place due to active transport of Na+ ions again to the outside.

Conduction of nerve impulse is a wave of depolarization followed by repolarisation.

Question 5

Myelin sheath

Neurilemma

Node of Ranvier

Cyton

Dendrite

Question 6

sensory and non-sensory retina

choroid and ciliary body

sclera and cornea

ciliary body and iris

iris and cornea

Question 7

Recovery phase

Active phase

Saltatory conduction

Neurotransmission

Excited phase

Question 8

Cornea

Pupil

Iris

Ciliary body

Lens

Question 9

Myelin sheath

Acetylcholine

Synaptic cleft

Nissil granules

Neurilemma

Question 10

Node of Ranvier

Excited region

Synaptic clefts

Dendrite

Neurilemma

Question 11

travel in one of the neurons because the impulse travels from dendrites of one neuron into the axon of another neuron

travel only in one neuron, which is in closest contact and with the same intensity

get distributed in all the four neurons resulting in weak impulse

travel in all the four neurons

travel in only two neurons, which are most closely associated

Question 12

Cerebral fluid

Cerebrospinal fluid

Meningial fluid

Synovial fluid

Acetylcoline

blockage of Na⁺ channels

blockage of K⁺ channels

Repolarization of nerve takes place due to active transport of Na⁺ ions again to the outside.

Due to movement of K⁺ ions out of the axon.

As more K⁺ ions enter the axon than Na⁺ ions leave the same.

As more Na⁺ ions enter the axon than K⁺ ions leave the same.

Due to all Na⁺ ions entering the axon.

Due to high concentration of Cl^-ions.