Neural Control and Coordination Test 11

Question 1
1 / -0

A typical value of resting membrane potential is

A
-100 mV

B
-70 mV

C
-40 mV

D
-60 mV

Question 2
1 / -0

Which of the following options illustrates the distribution of Na⁺ and K⁺ ions in a section of non-myelinated axon which is at resting potential?

A

B

C

D

Question 3
1 / -0

Which one of the following does not act as a neurotransmitter?

A
Cortisone

B
Acetylcholine

C
Epinephrine

D
Norepinephrine

Question 4
1 / -0

During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?

A
First positive, then negative and continue to be negative

B
First negative, then positive and continue to be positive

C
First positive, then negative and again back to positive

D
First negative, then positive and again back to negative

Question 5
1 / -0

During the propagation of a nerve impulse, the action potential results from the movement of

A
K⁺ ions from intracellular fluid to extracellular fluid

B
Na⁺ ions from extracellular fluid to intracellular fluid

C
K⁺ ions from extracellular fluid to intracellular fluid

D
Na⁺ ions from intracellular fluid to extracellular fluid

Question 6
1 / -0

Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that

A
nerve fibre is insulated by a medullary sheath

B
sodium pump starts operating only at the cyton and then continues into the nerve fibre

C
neurotransmitters are released by dendrites and not by axon endings

D
neurotransmitters are released by the axon endings and not by dendrites

Question 7
1 / -0

Saltatory conduction of impulse occurs in

A
liver cells

B
non-myelinated nerve fibres

C
myelinated nerve fibres

D
none of these

Question 8
1 / -0

Sodium-potassium pump transports

A
Na⁺ and K⁺ out of the neuron

B
Na⁺ and K⁺ into the neuron

C
Na⁺ into the neuron and K⁺ out of the neuron

D
K⁺ into the neuron and Na⁺ out of the neuron

Question 9
1 / -0

Nerve fibres transmit the nerve message by _____ means.

A
chemical

B
physical

C
electrochemical

D
electrical

Question 10
1 / -0

Read the given statements and select the correct option.
(i) Synaptic cleft of neurons secrete adrenaline.
(ii) Myelinated nerve fibres are enveloped with Schwann cells, which from a myelin sheath around the axon.
(iii) Non-myelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath.
(iv) Spinal and cranial nerves are made of non-melinated nerve fibres.

A
Statements (i) and (ii) are correct but statements (iii) and (iv) are incorrect

B
Statements (i), (ii) and (iii) are correct but statement (iv) is incorrect

C
Statement (iii) and (iv) are correct but statement (i) and (ii) are incorrect

D
Statement (ii) and (iii) are correct but statements (i) and (iv) are incorrect

Question 11
1 / -0

The electrical potential difference between outside and inside of a nerve axon before excitation is known as

A
resting potential

B
action potential

C
spike potential

D
reaction potential

Question 12
1 / -0

Read the given statements and select the correct ones.
(i) Autonomic neural system transmits impulses from the CNS to the voluntary organs and striated muscles of the body.
(ii) Unmyelinated nerve fibres do not have Schwann cells which form the myelin sheath.
(iii) Axonal membrane of a neuron while not conducting any impulse is comparatively more permeable to potassium ions (K⁺) than to sodium ions (Na⁺).
(iv) A synapse is formed by the membranes of a presynaptic neuron and a post synaptic neuron.

A
(i) and (ii)

B
(ii) and (iii)

C
(iii) and (iv)

D
(i) and (iv)

Question 13
1 / -0

In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive

A
K⁺ into the cell

B
K⁺ and Na⁺ out of the cell

C
Na⁺ out of the cell

D
Na⁺ into the cell

Question 14
1 / -0

Which of the following statements is/are incorrect about the electrical synapse?
(i) At electrical synapses, the membranes of pre and post synaptic neurons are in very close proximity.
(ii) Electrical current can flow directly from one neuron into the other across the synapses
(iii) Transmission of an impulse across electrical synapses is very similar to impulse conduction along single axon
(iv) Electrica synapses pass electrical signal between cells with the use of Ach.
(v) Electrical synapses are fast.
(vi) Electrical synapses are rare in our system.

A
(ii), (iv) and (v)

B
(i) and (iii)

C
(iv) only

D
(i), (v) and (vi)

Question 15
1 / -0

Read the given paragraph.
In the resting state, the axonal membrane is (i) with more (ii) charged ions outside than inside. This unequal distribution of ions os due to (1) the selective permeability of the membrane, which forms an almost impenetrable barrier to (iii) and (2) the action of the (iv) which pumps (v) Na⁺ out of the neuron for every (vi) K⁺ brought in.
Select the option that correctly fills the blanks in the paragraph.

A
a

B
b

C
c

D
d

Submit Test

Neural Control ...

Question 1

-100 mV

-70 mV

-40 mV

-60 mV

Question 2

Question 3

Cortisone

Acetylcholine

Epinephrine

Norepinephrine

Question 4

First positive, then negative and continue to be negative

First negative, then positive and continue to be positive

First positive, then negative and again back to positive

First negative, then positive and again back to negative

Question 5

K+ ions from intracellular fluid to extracellular fluid

Na+ ions from extracellular fluid to intracellular fluid

K+ ions from extracellular fluid to intracellular fluid

Na+ ions from intracellular fluid to extracellular fluid

Question 6

nerve fibre is insulated by a medullary sheath

sodium pump starts operating only at the cyton and then continues into the nerve fibre

neurotransmitters are released by dendrites and not by axon endings

neurotransmitters are released by the axon endings and not by dendrites

Question 7

liver cells

non-myelinated nerve fibres

myelinated nerve fibres

none of these

Question 8

Na+ and K+ out of the neuron

Na+ and K+ into the neuron

Na+ into the neuron and K+ out of the neuron

K+ into the neuron and Na+ out of the neuron

Question 9

chemical

physical

electrochemical

electrical

Question 10

Statements (i) and (ii) are correct but statements (iii) and (iv) are incorrect

Statements (i), (ii) and (iii) are correct but statement (iv) is incorrect

Statement (iii) and (iv) are correct but statement (i) and (ii) are incorrect

Statement (ii) and (iii) are correct but statements (i) and (iv) are incorrect

Question 11

resting potential

action potential

spike potential

reaction potential

Question 12

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

(i) and (iv)

Question 13

K+ into the cell

K+ and Na+ out of the cell

Na+ out of the cell

Na+ into the cell

Question 14

(ii), (iv) and (v)

(i) and (iii)

(iv) only

(i), (v) and (vi)

Question 15

a

b

c

d

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Question Analysis

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K⁺ ions from intracellular fluid to extracellular fluid

Na⁺ ions from extracellular fluid to intracellular fluid

K⁺ ions from extracellular fluid to intracellular fluid

Na⁺ ions from intracellular fluid to extracellular fluid

Na⁺ and K⁺ out of the neuron

Na⁺ and K⁺ into the neuron

Na⁺ into the neuron and K⁺ out of the neuron

K⁺ into the neuron and Na⁺ out of the neuron

K⁺ into the cell

K⁺ and Na⁺ out of the cell

Na⁺ out of the cell

Na⁺ into the cell