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Worksheetsneuro control and coordination
Total questions: 41
Worksheet time: 1hrs 22mins
Which is not likely to happen when we do physical exercises ?
supply of oxygen is increased
increase in the rate of respiration
increase in the rate of heart beat
decreased blood flow
Bipolar neuron are found in-
embryonic stage
retina of eye
cerebral cortex
all of these
S 1 - Unmyelinated nerve fibre is enclosed by a Schwann cell .
S 2 - Unmyelinated nerve fibre is commonly found in autonomous and the somatic neural systems.
Both are correct
Both are incorrect
Only S1 is correct
Only S2 is correct
A ) At Resting state , the axonal membrane is comparatively more permeable to sodium ions (Na+ ) and nearly impermeable to potassium ions (K+ )
B) Sodium-potassium pump transports 3 Na+ outwards for 2 K+ into the cell.
Both are correct
Both are incorrect
Only A is correct
Only B is correct
Transmission of an impulse across .............................. is very similar to impulse conduction along a single axon.
Chemical Synapse
Electrical Synapse
Chemical and Electrical signal both
neither electrical nor chemical synapse
A - The human neural system is divided into two parts - CNS and PNS
B -The autonomic neural system is classified into sympathetic and parasympathetic neural system.
Both are correct
Both are incorrect
A is correct only
B is correct only
Out of four statement how many statements are correct?
A. At electrical synapses, the membranes of pre- and post-synaptic neurons are in very close proximity
B. Impulse transmission across an chemical synapse is always faster than that across a electrical synapse.
C. Neurotransmitters are involved in the transmission of impulses at chemical synapses.
D. Chemical synapses are rare in our system than electric synapse
Four statement are correct
Three statement are correct
Two statement are correct
Only one statement is correct
On what basis, neurons are classified as -unipolar, bipolar or multipolar?
Transmission of impulse
Number of axons and dendrites
Sensory or motor nature
Number of nucleus within cell body
A. The released neurotransmitters bind to their specific receptors, present on the pre-synaptic membrane of neuron.
B. The new potential developed in post-synaptic neuron is always excitatory.
A and B both are correct
A and B both are incorrect
Only A is correct
Only B is correct
Which of the following statements are 'True' and 'False'?
I. The axoplasm inside the axon contains high concentration of K+ and negatively charged proteins.
Il. The axoplasm inside the axon contains low concentration of Na+.
lll. The fluid outside the axon contains a low concentration of K+.
IV. The fluid outside the axon contains a high concentration of Na+ and negatively charged proteins.
I-True, II-False, lll-False, IV-True
I-True, Il-True, Ill-False, IV-False
I-True. Il-True, Ill-True, IV-False
l-False. Il-False, lll-False. lV-True
Assertion (A) Arrival of an impulse at the axon terminal stimulates the release of neurotransmitter in the synaptic cleft.
Reason (R) These neurotransmitters are responsible for the opening of ion channels.
Both A and R arc true and R is the correct explanation of A
Both A and R are true. but R is not the correct explanation of A
A is true, but R is false
Both A and R are false
A. Vertebrates have a more developed neural system.
B . The efferent nerve fibres transmit impulses from tissues/organs to the CNS
A and B both are correct
A and B both are incorrect
Only A is correct
Only B is correct
A. A neuron is a macroscopic structure composed of three major parts.
B. The axons transmit nerve impulses away from the cell body to a synapse or to a neuro-muscular junction.
Both A and B are correct
Both A and B are incorrect
Only A is correct
Only B is correct
Consider the following statements.
I. Dendites transmit impulses towards the cell body.
II. Axon is long fibre whose distal end is non- branched.
Choose the correct option -
Statement I is correct, but II is incorrect
Statement I is incorrect, but II is correct
Both I and II are correct
Both I and II are incorrect
A - Multipolar neuron are present in found in the cerebral cortex.
B - Unipolar neuron are found usually in the embryonic stage.
Both are correct
Both are incorrect
Only A is correct only
Only B is correct only
A - The gaps between two adjacent myelin sheaths are called nodes of Ranvier.
B - The rise in the stimulus-induced permeability to Na+ is extremely long lived.
Both are correct
Both are incorrect
A is correct only
A is incorrect only
A - Synaptic knob is bulb-like structure which is present at the end of dendrites.
B - For the maintenance of ionic gradients across the resting membrane, the sodium-potassium pump transports
3Na+ outwards for 2K+into the cell.
Both are correct
Both are incorrect
Only A is correct
Only B is correct
Choose the correct option
(1)
(2)
(3)
(4)
An investigator places an isolated neuron in a calcium-free medium, gives the neuron a suprathreshold stimulus and then performs an assay to test whether neurotransmitter is released into the medium. Which of the following outcomes would you predict?
No neurotransmitter is detected since influx of calcium into the synaptic knob is required for neurotransmitter release
No neurotransmitter is detected since influx of calcium is required in order for the neuron to conduct an action potential
Neurotransmitter is detected since calcium is not required for action potential conduction and the initial stimulus was suprathreshold
we camot predict the outcome without knowing whether the neuron was myelinated
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?
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
The figure shows an axon terminal and synapse. Select the option giving conect identification of labels l-D.
A-Action terminal
C-Neurotransmitter
B-Neurotransmitter,
D Receptor
A-Axon,
B- Neurotransmitter
A-Axon terminal,
B-Receptor
Which excitatory neurotransmitter is involved in the transmission of impulse at the neuro-muscular junction?
Epinephrine
Serotonin
Acetyl choline
Glycine
Acetylcholine is a :
Hormone
Brain peptide
Neurotransmitter
Digestive enzyme
Myelin sheath is produced by :
Astrocytes and Schwann cells
Oligodendrocytes and Osteoclasts
Osteoclasts and Astrocytes
Schwann cells and Oligodendrocytes
Receptor sites for neurotransmitters are present on :
Pre-synaptic membrane
Tips of axons
Post-synaptic membrane
Membrane of synaptic vesicles
If myelin sheath present completely around axon what will be happened?
Conduction will be as usual
Conduction is slow
Conduction is fast
Conduction is stoppped
In nerve resting membrane potential is maintained by :
Active transport
Passive diffusion
Both (a) and (b)
Unidirectional flow of ion
Nissl bodies are mainly composed of
Nucleic acids and SER
DNA and RNA
Proteins and lipids
Free ribosomes and RER
In the above diagram showing axon terminal and synapse A, B, C, D and E respectively represents:
axon terminal, synaptic cleft, synaptic vesicles, neurotransmitters and receptors
axon terminal, synaptic vesicles, synaptic cleft, receptors and neurotransmitters
synaptic cleft, synaptic vesicles, axon terminal, neurotransmitters and receptors
synaptic cleft, axon terminal, synaptic vesicles, neurotransmitters and receptors
The impulses from CNS to skeletal muscles are relayed through
SNS
Somatic neural system
PSNS
All of these
Unidirectional transmission of the nerve impulse is maintained by –
Interneurons
Myelin sheath
Synapse
Membrane polarity
Mark the correct statement
Electrical synapses are more common in our neural system than chemical synapses
The new potential in post synaptic neuron may be either excitatory or inhibitory
Hypothalamus is the major coordination centre for sensory and motor signaling
The tracts of nerve fibres that connect two cerebral hemispheres are called corpora bigemina
The secretion of gastric juice is controlled by
Cerebellum
ANS
Cerebrum
Medulla
Mark the correct statement
Limbic system is involved in emotional expression
Cerebral aqueduct passes through mid brain
The meninx in contact of brain tissue is pia mater
All of these
Sodium – Potassium pump across membrane, actively transports
2-Na ions outwards and 3 K ions into the cell
3-Na ions outwards and 2 K ions into the cell
2-K ions out wards and 3 Na ions into the cell
3 K ions outwards and 2 Na ions into the cell
Which of the following regions of the brain is incorrectly paired with its function?
Corpus callosum – Communication between the left and right cerebral cortices
Cerebrum – Calculation and contemplation
Medulla oblongata – Homeostatic control
Cerebellum – Language comprehension
The function of our visceral organs are controlled by
Sympathetic and somatic nervous system
Sympathetic and parasympathetic nervous system
Central and somatic nervous system
None of the above
Human body temperature is regulated by the centre located in
Cerebrum
Cerebellum
Medulla
Hypothalamus
Mark the area of cerebral cortex responsible for complex functions like intersensory association, memory and communication
Sensory area
Motor area
Associative area
Both (1) & (2)
Highly vascular and closely investing protective coat around brain is known as
Arachnoid
Pia mater
Dura mater
Sub-arachnoid space
In the given diagram what does “A” represent?
Pons
Midbrain
Cerebellum
Medulla oblongata
