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Neural Control And Coordination

224 Questions Start Allen Test
All Exams Allen
Q176 Allen PYQ MCQ
Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?
A.
Vacuoles and fibres
B.
Flagellum and medullary sheath
C.
Nucleus and mitochondria
D.
Perikaryon and dendrites
Q177 Allen PYQ MCQ
During the propagation of a nerve impulse, the action potential results from the movement of :
A.
Kāŗ from intracellular fluid to extracellular fluid
B.
Naāŗ from extracellular fluid to intracellular fluid
C.
Kāŗ from extracellular fluid to intracellular fluid
D.
Naāŗ from intracellular fluid to extracellular fluid
Q178 Allen PYQ MCQ
The nerve centres which control the body temperature and the urge for eating are contained in:
A.
Cerebellum
B.
Thalamus
C.
Hypothalamus
D.
Pons
Q179 Allen PYQ MCQ
A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neuro-hormonal control system?
A.
Hypothalamus activates the parasympathetic division of brain
B.
Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal cortex
C.
Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla
D.
Neurotransmitters diffuses rapidly across the synaptic cleft and transmit a nerve impulse
Q180 Allen PYQ MCQ
A diagram showing axon terminal and synapse is given below. Identify correctly at least two of A-D.
A.
C-Neurotransmitter, D-Ca++
B.
A-Receptor, C-Synaptic vesicles
C.
B-Synaptic connection, D-K+
D.
A-Neurotransmitter, B-Synaptic cleft
Q181 Allen PYQ MCQ
How do parasympathetic neural signals affect the working of the human heart ?
A.
Reduce both heart rate and cardiac output.
B.
Heart rate is increased without affecting the cardiac output.
C.
Both heart rate and cardiac output increase.
D.
Heart rate decreases but cardiac output increases.
Q182 Allen PYQ MCQ
Injury localized to the hypothalamus would most likely to disrupt :
A.
short - term memory.
B.
co-ordination during locomotion.
C.
executive functions, such as decision making.
D.
regulation of body temperature.
Q183 Allen PYQ MCQ
Which of the following regions of the brain is incorrectly paired with its function?
A.
Cerebellum- language comprehension
B.
Corpus callosum-communication between the left and right cerebral cortex
C.
Cerebrum- calculation and contemplation
D.
Medulla oblongata - homeostatic control
Q184 Allen PYQ MCQ
Myelin sheath is produced by:
A.
Astrocytes and Schwann cells
B.
Oligodendrocytes and Osteoclasts
C.
Osteoclasts and Astrocytes
D.
Schwann cells and Oligodendrocytes
Q185 Allen PYQ MCQ
Receptor sites for neurotransmitters are present on:
A.
Pre-synaptic membrane
B.
Tips of axons
C.
Post-synaptic membrane
D.
Membrane of synaptic vesicles
Q186 Allen PYQ MCQ
Which of the following structures or regions is incorrectly paired with its function?
A.
Medulla oblongata, Controls respiration and cardiovascular reflexes.
B.
Limbic system, Consists of fibre tracts that interconnect different regions of brain; controls movement.
C.
Hypothalamus, Production of releasing hormones and regulation of temperature, hunger and thirst.
D.
Corpus callosum,Band of fibres connecting left and right cerebral hemispheres.
Q187 Allen PYQ MCQ
Which part of the brain is responsible for thermoregulation?
A.
Cerebrum
B.
Hypothalamus
C.
Corpus callosum
D.
Medulla oblongata
Q188 Allen PYQ MCQ
Which of the following statements is not correct?
A.
An action potential in an axon does not move backward because the segment behind is in a refractory phase
B.
Depolarisation of hair cells of cochlea
results in the opening of the mechanically
gated potassium -ion channels.
C.
Rods are very sensitive and contribute to
daylight vision.
D.
In the knee-jerk reflex, stimulus is the
stretching of muscle and response is its
contraction.
Q189 Allen PYQ MCQ
Select the incorrect statement regarding synapses: an electrical synapse.
A.
Electrical current can flow directly from one neuron into the other across the
B.
Chemical synapses use neurotransmitters
C.
Impulse transmission across a chemical synapse is always faster than that across an electrical synapse.
D.
The membranes of presynaptic and postsynaptic neurons are in close proximity in an electrical synapse.
Q190 Allen PYQ Match the Columns
Match Column- I with Column- II
Column-IColumn-II
(A)Multipolar neuron
(B)Bipolar neuron
(C)Myelinated nerve fibre
(D)Unmyelinated nerve fibre
(I)Somatic neural system
(II)Cerebral cortex
(III)Retina of Eye
(IV)Spinal nerves
A.
(A) āˆ’ (III), (B) āˆ’ (I), (C) āˆ’ (IV), (D) āˆ’ (II)
B.
(A) āˆ’ (II), (B) āˆ’ (IV), (C) āˆ’ (III), (D) āˆ’ (I)
C.
(A) āˆ’ (II), (B) āˆ’ (III), (C) āˆ’ (I), (D) āˆ’ (IV)
D.
(A) āˆ’ (II), (B) āˆ’ (III), (C) āˆ’ (IV), (D) āˆ’ (I)
Q191 Allen NCERT Based QUESTIONS MCQ
Which system provides an organised network of point to point connection :-
A.
Integrated system
B.
Neuro-endocrine system
C.
Endocrine system
D.
Nervous system
Q192 Allen NCERT Based QUESTIONS MCQ
Which role of neuron regarding different kinds of stimuli is absent :-
A.
detect
B.
receive
C.
transmit
D.
protect
Q193 Allen NCERT Based QUESTIONS MCQ
The accompanied diagram shows the structure of neuron. Identify A to E.
A.
A-Nerve fibre, B-Cyton or cell body, C-Schwann cell, D-Node of Ranvier, E-Synaptic knob
B.
A-Dendrites, B-Cyton or cell body, C-Schwann cell, D-Node of Ranvier, E-Synaptic knob
C.
A-Dendrites, B-Nerve cell, C-Schwann cell, D-Node of Ranvier, E-Synaptic knob
D.
A-Dendrites, B-Cyton or cell body, C-Nerve cell, D-Node of Ranvier, E-Synaptic knob
Q194 Allen NCERT Based QUESTIONS MCQ
When a neuron is not conducting any impulse i.e. resting, the axonal membrane is -
A.
Comparatively more permeable to K+ and impermeable (nearly impermeable) to Naāŗ
B.
Impermeable to negatively charged proteins present in the axoplasm
C.
1 & 2 Both
D.
More permeable to Naāŗ ions than Kāŗ ion
Q195 Allen NCERT Based QUESTIONS MCQ
Pick out the incorrect statement?
A.
Myelinated nerve fibres are found in spinal and cranial nerve.
B.
Unmyelinated nerve fibre is enclosed by a schwann cell.
C.
In resting stage the axonal membrane is comparatively more permeable to potassium ion and nearly impermeable to sodium ions.
D.
Axolemma is more permeable to negatively charged protein present in the axoplasm.
Q196 Allen NCERT Based QUESTIONS MCQ
During depolarization of the neuronal membrane-
A.
Naāŗ ions rapidly move inside the cell
B.
Naāŗ ions rapidly move outside the cell
C.
Kāŗ ions rapidly move outside the cell
D.
Kāŗ ions rapidly move inside the cell
Q197 Allen NCERT Based QUESTIONS MCQ
Identify the correct set of statements :
(a) Limbic lobe consists of amygdala and pons.
(b) Cerebral aqueduct passes through the midbrain.
(c) The medulla contains centre which control respiration, cardiovascular reflexes and gastric secretions.
(d) Brain stem forms the connections between the cerebrum and midbrain.
(e) Knee jerk reflex is polysynaptic reflex. Choose the correct answer from options given below :
A.
(a) and (d) only
B.
(b), (c), (d) and (e) only
C.
(a), (b), (d) and (e) only
D.
(b) and (c) only
Q198 Allen NCERT Based QUESTIONS MCQ
Study the diagram of synapse- I. Which alphabet indicate the location of the receptor molecules ? II. Which alphabet points to a synaptic vesicles III. Which alphabet points to neurotransmitter IV. Which alphabet points to synaptic cleft
A.
I-C, II-A, III-B, IV-D
B.
I-B, II-A, III-C, IV-D
C.
I-C, II-A, III-D, IV-B
D.
I-C, II-D, III-A, IV-B
Q199 Allen NCERT Based QUESTIONS MCQ
Which of the following statements is false 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. Electrical 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.
I and II
B.
Only II
C.
Only IV
D.
Only V
Q200 Allen NCERT Based QUESTIONS MCQ
Identify the correct set of statements :
(a) Myelinated nerve fibres are found in autonomic and the somatic neural systems.
(b) The gaps between two adjacent myelin sheaths are called nodes of Ranvier.
(c) The axonal membrane is impermeable to negatively charged proteins present in the axoplasm.
(d) Electrical synapses are rare in our system.
(e) Synaptic cleft is present in chemical synapse.
Choose the correct answer from options given below :
A.
(a) and (d) only
B.
(b), (c), (d) and (e) only
C.
(a), (b), (d) and (e) only
D.
(b) and (c) only