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Control And Coordination Mcq
Quiz 9
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Q.1
Ratio of actual age to mental age is
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a) Intelligence quotient
0%
b) Idiocy
0%
c) Rationality
0%
d) Both b. and c.
Explanation
Intelligence quotient defined originally as the ratio of mental age (ma) to chronological age (ca) multiplied by 100 [thus, IQ = (ma/ca) x 100]. Answer : (a)
Q.2
During rest sodium pump of a nerve results in
0%
a) More Na+ pumped than K+ ions taken in
0%
b) Na+ pumped in without exchange with any other ion
0%
c) Exchanging equal amounts of Na+ and K+
0%
d) More Na+ pumped in than K+ ions pumped out
Explanation
When a neurone is not sending a signal, it is at ‘rest’. The membrane is responsible for the different events that occur in a neurone. All animal cell membranes contain a protein pump called the sodium-potassium pump (Na+K+ATPase). This uses the energy from ATP splitting to simultaneously pump 3 sodium ions out of the cell and 2 potassium ions in. Answer : (a)
Q.3
Structure that provides balance to the body is located in
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a) Outer ear
0%
b) Middle ear
0%
c) Inner ear
0%
d) Eustachian tubes
Explanation
The vestibular system, located in inner ear, is the sensory system that provides the leading contribution to the sense of balance and spatial orientation for the purpose of coordinating movement with balance. Answer : (c)
Q.4
Which is part of human brain
0%
a) Corpora alata
0%
b) Corpora bigemina
0%
c) Corpora adipose
0%
d) Corpora quadrigemina
Explanation
Corpora quadrigemina are the four colliculi—two inferior, two superior—located on the tectum of the dorsal aspect of the midbrain. They are respectively named the inferior and superior colliculus. Answer : (d)
Q.5
Depolarisation of nerve cell involves
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a) Influx of K+
0%
b) Influx of Na+
0%
c) Influx of Ca2+ and Cl-
0%
d) Efflux of Na2+
Explanation
Sodium channels open and sodium rushes into the axon, causing a region of positive charge within the axon. This is called depolarisation Answer : (b)
Q.6
In an axon , nerve impulse travels
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a) Away from cyton
0%
b) Towards cyton
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c) Both away and towards cyton
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d) Not known
Explanation
The cyton transmits only strong impulses. Weak impulses are not further transmitted. An impulse passed on by the cyton travels along the axon of the neuron. When it reaches the end of the axon, it causes the axon bulb to release a chemical which diffuses across the synapse and stimulates the dendrites of the adjacent neuron. Answer : (a)
Q.7
Choroid plexus is network of
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a) Muscle fibre
0%
b) Lymph capillaries
0%
c) Blood capillaries
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d) Nerves
Explanation
The choroid plexus is composed of blood vessels and specialized epithelial tissue called ependyma.The choroid plexus serves two important functions in the body. It produces cerebrospinal fluid and helps to provide a barrier, which protects the brain and other central nervous system tissue from toxins. Answer : (c)
Q.8
Which of the following disorder is not hereditary?
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a) Haemophilia
0%
b) Cataract
0%
c) Sickle cell anaemia
0%
d) Color blindness
Explanation
Most cataracts develop when aging or injury changes the tissue that makes up your eye's lens. Some inherited genetic disorders that cause other health problems can increase your risk of cataracts. Answer : (b)
Q.9
In Pavlov experiments the sound of bell represents
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a) Conditioned stimulus
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b) Unconditioned response
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c) Unconditioned stimulus
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d) Conditioned response
Explanation
a) the conditioned stimulus is a previously neutral stimulus that, after becoming associated with the unconditioned stimulus, eventually comes to trigger a conditioned response. b) An unconditioned response is behavior that occurs naturally due to a givenstimulus. However, a stimulus prompts a conditioned response only when someone has come to associate that stimulus with another. For example, when a person yelps upon being bitten by an insect, the yelp is an unconditioned response. c) stimulus that elicits an unconditioned response; for example, food is an unconditioned stimulus for a hungry animal, and salivation is the unconditioned response. d) Conditioned response an automatic response established by training to an ordinarily neutral stimulus. Answer : (a)
Q.10
Scala tympani is connected to scala vestibule by means of
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a) Stapes
0%
b) Helicotrema
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c) Basilar membrane
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d) Tectorial membrane
Explanation
The helicotrema is the part of the cochlear labyrinth where the scala tympani and the scala vestibule meet. Answer : (b)
Q.11
Primary function of Myelin sheath around vertebrate axon is to
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a) Regulate Na-K pump
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b) Increases in size of action potential
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c) Increases in speed of conduction by preventing leakage of nerve impulse
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d) Deactivate the release of neurotransmitter
Explanation
The main purpose of a myelin sheath is to increase the speed at which impulses propagate along the myelinated fiber. Answer : (c)
Q.12
Which one is a slow neuro-transmitter?
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a) GABA
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b) Adrenaline
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c) Epinephrine
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d) None of the above
Explanation
Slow-acting neurotransmitters, which include dopamine and serotonin, all peptide neurotransmitters, as well as glutamate and GABA, achieve their effects over seconds to minutes Answer : (a)
Q.13
Delicious food makes mouth watering due to
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a) Hormonal response
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b) Neural response
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c) Olfactory response
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d) Optic response
Explanation
Delicious food makes mouth watering due to Neural response Answer : (b)
Q.14
Vagus nerve is .. … [ WB 2012]
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a) Sensory tenth cranial nerve
0%
b) Motor tenth cranial nerve
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c) Mixed tenth cranial
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d) Mixed eleventh cranial nerve
Explanation
The Vagus Nervehistorically cited as the Pneumogastricnerve.Transmit impulses to muscles associated with speech, swallowing, the heart, smooth muscles of visceral organs in the thorax, and abdomen. It is a PNS and haveSensory motor+PSNSperves Answer : (c)
Q.15
Iodopsin pigments erythrolabe, chlorolabe, and cyanolabe are respectively
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a) Red, green and blue
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b) Blue, green and red
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c) Red, blue and green
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d) Green, red and blue
Explanation
Erythrolabe the pigment in retinal cones that is more sensitive to the red range of the spectrum. Chlorolabe the pigment in retinal cones that is more sensitive to the green portion of the spectrum. Cyanolabe the pigment in retinal cones that is more sensitive to the blue range of the spectrum. Answer : (a)
Q.16
Which one occurs in mesencephalon/midbrain ?
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a) Cerebellum
0%
b) Inferior colliculus
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c) Thalamus
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d) Mammillary body
Explanation
The inferior colliculus is the principal midbrain nucleus of the auditory pathway and receives input from several peripheral brainstem nuclei in the auditory pathway, as well as inputs from the auditory cortex. Answer : (b)
Q.17
Opening in skull is …. [ CPMT 2010]
0%
a) Foramen of Monro
0%
b) Foramen magnum
0%
c) Coronal nature
0%
d) Lambdoidal suture
Explanation
There is a large opening, called the foramen magnum, located in the back of the occipital bone. This is where the medulla ends and projects out of the skull. Smaller holes in the skull, called foramina, allow nerves and blood vessels to enter and leave the cranium. Answer : (b)
Q.18
Cochlea lodges
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a) Helicotrema
0%
b) Meibomian gland
0%
c) Organ of corti
0%
d) Fenestra rotundm
Explanation
A core component of the cochlea is the Organ of Corti, the sensory organ of hearing, Answer : (c)
Q.19
Which cells do not divide after birth?
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a) Nerve cells
0%
b) Germ cells
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c) Muscle cells
0%
d) Osteocytes
Explanation
Nerve cells are not able to multiply because they lack centrioles as they can notparticipate in mitosis and meiosis activity but still they get longer without dividingduring childhood. It occurs due to synpatic or axon pruning Answer : (a)
Q.20
Centre of thrust and hunger is located in
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a) Cerebrum
0%
b) Cerebellum
0%
c) Hypothalamus
0%
d) Medulla oblongata
Explanation
The hormones from the hypothalamus govern physiologic functions such as temperature regulation, thirst, hunger, sleep, mood, sex drive, and the release of other hormones within the body. Answer : (c)
Q.21
Which one has the shortest duration of contraction?
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a) Eye lids
0%
b) Jaw
0%
c) Heart
0%
d) Intestine
Explanation
Blinks elicited by stimulation of the supraorbital nerve had shortest duration. The supraorbital nerve is a terminal branch of the frontal nerve. It passes through the supraorbital foramen, and gives off, in this situation, palpebral filaments to the upper eyelid. Answer : (a)
Q.22
Respiratory centre is situated in
0%
a) Cerebellum
0%
b) Medulla oblongata
0%
c) Hypothalamus
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d) Cerebrum
Explanation
The respiratory center is located in the medulla oblongata and pons, in the brainstem Answer : (b)
Q.23
Largest ear ossicle is
0%
a) Incus
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b) Stapes
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c) Malleus
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d) Stapedial plate
Explanation
Answer : (c)
Q.24
Area of cerebral cortex controlling vision is
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a) Frontal lobe
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b) Parietal lobe
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c) Temporal lobe
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d) Occipital lobe
Explanation
Area of cerebral cortex controlling vision is Occipital lobe Answer : (d)
Q.25
Lateral rectus muscle of eye is served by cranial nerve
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a) Oculomotor
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b) Pathetic
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c) Abducens
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d) Spinal accessory
Explanation
Lateral rectus muscle of eye. It is the only muscle innervated by the abducens nerve, Answer : (c)
Q.26
Which of the following cranial nerve is not a motor nerve?
0%
a) II
0%
b) III
0%
c) IV
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d) XII
Explanation
I, II, VIII are sensory nerves only Answer : (a)
Q.27
Nerve transmission is
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a) Mechanical process
0%
b) Chemical process
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c) Physical process
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d) Biological process
Explanation
Nerve transmission is chemical process Answer : (b)
Q.28
Which of the following is a motor nerve ?
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a) Auditory
0%
b) Abducens
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c) Optic nerve
0%
d) Trigeminal nerve
Explanation
Cranial Nerve
Name
Function
I
The Olfactory Nerve
Sense of Smell
II
The Optic Nerve
Vision
III
The Oculomotor Nerve
Raise eyelids, move eyes, regulate the size of pupils, focus of lenses.
IV
The Trochlear Nerve
Eye movements, proprioception
V
The Trigeminal Nerve
Sensations of the head and face, chewing movements, and muscle sense.
VI
The Abducent Nerve
Produce movements of the eyes
VII
The Facial Nerve
Facial expressions, secretion of saliva, taste.
VIII
The Vestibulocochlear Nerve
Balance or equilibrium sense. Hearing.
IX
The Glossopharyngeal Nerve
Taste and other sensations of tongue, swallowing, secretion of saliva, aid in reflex control of blood pressure and respiration.
X
The Vagus Nervehistorically cited as the pneumogastric nerve
Transmit impulses to muscles associated with speech, swallowing, the heart, smooth muscles of visceral organs in the thorax, and abdomen.
XI
Accessory nerve
Turning movements of the head, movements of the shoulder and viscera, voice production.
XII
Hypoglossal
Tongue movements
Answer : (b)
Q.29
A cranial nerve with maximum branches in the body is
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a) Vagus
0%
b) Abducens
0%
c) Trochlear
0%
d) Optic
Explanation
The Trigeminal Nerve(V) Stemming from the lateral superior margin of the left and right side of the pons, this nerve branches into three: V/I ophthalmic, V/II maxillary and V/III mandibular nerves pharyngeal nerve and the superior laryngeal nerve are the two branches of Vagus Answer : (c)
Q.30
Father of conditioned reflex is
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a) Pavlov
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b) Kalvin
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c) Oparin
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d) Smith and Neil
Explanation
Father of conditioned reflex is Pavlov Answer : (a)
Q.31
Iris is part of
0%
a) Sclerotic
0%
b) Choroid/Uvea
0%
c) Choroid and retina
0%
d) Sclerotic and choroid
Explanation
Answer : (c)
Q.32
Activity of brain is recorded by
0%
a) ECG
0%
b) MET
0%
c) EEG
0%
d) CT
Explanation
Electroencephalography (EEG) is an electrophysiological monitoring method to record electrical activity of the brain. Answer : (c)
Q.33
Cranial nerves IV, V and VII are respectively
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a) Trochlear, Trigeminal and Facial
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b) Auditory, Facial and Trochlear
0%
c) Auditory , Trochlear and Facial
0%
d) Trochlear, Trigeminal and Auditory
Explanation
Cranial nerves IV = Trochlear Cranial nerves V = Trigeminal Cranial nerves VII =Facial Answer : (a)
Q.34
Number of rod cells in eye is
0%
a) 120 million
0%
b) 80 million
0%
c) 60 million
0%
d) 180 million
Explanation
There are approximately 90 million rod cells in the human retina. Answer : (a)
Q.35
Nerve impulse travels as
0%
a) Mechanical impulse
0%
b) Chemical impulse
0%
c) Electrical impulse
0%
d) Magnetic impulse
Explanation
Nerve impulse travels as Electrical impulse Answer : (c)
Q.36
Low light intensity as during night is detected by
0%
d) Both B and C
0%
a) Lens
0%
b) Rods
0%
c) Cones
Explanation
Low light intensity as during night is detected by Rods Answer : (b)
Q.37
Seventh cranial nerve enters
0%
a) Jugular ganglion
0%
b) Geniculate ganglion
0%
c) Gasserian ganglion
0%
d) Femoral ganglion
Explanation
The geniculate ganglion (is an L-shaped collection of fibers and sensory neurons of the facial nerve (seventh cranial nerve) Answer : (b)
Q.38
The third ventricle of brain is situated in … ..[ AMU 2010]
0%
a) Base of telencephalon
0%
b) Roof of metencephalon
0%
c) Below roof of diencephalon
0%
d) Base of myelencephalon
Explanation
Diencephalon:The floor of the third ventricle is formed by a number of structures including the hypothalamus, subthalamus, mammilary bodies, infundibulum (pituitary stalk), and the tectum of the midbrain. Answer : (c)
Q.39
Which controls reflex action?
0%
a) Central nervous system
0%
b) Sympathetic nervous system
0%
c) Parasympathetic nervous system
0%
d) Sensory nerves
Explanation
A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain. Answer : (a)
Q.40
Space between piamater and arachnoid is
0%
a) Supra-arachnoid
0%
b) Subarachnoid
0%
c) Subdural
0%
d) Epidural
Explanation
The subarachnoid space (subarachnoid cavity) is the anatomic space between the arachnoid mater and the pia mater. Answer : (b)
Q.41
Sensory structure that responds to pressure change is
0%
a) Meissner’s corpuscle
0%
b) Pacinian corpuscle
0%
c) End bulb of Krause
0%
d) Organ of ruffini
Explanation
Pacinian corpuscles is Encapsulated pressure receptors, respond only to mechanical deformation. Answer : (b)
Q.42
Vagus nerve is
0%
a) Parasympathetic nerve
0%
b) Sympathetic nerve
0%
c) X cranial nerve
0%
d) V cranial nerve
Explanation
Vagus nerve is X nerve and is both sensory and motor nerve Answer : (c)
Q.43
Number of spinal nerves in man is
0%
a) 31 pairs
0%
b) 32 pairs
0%
c) 12 pairs
0%
d) 29 pairs
Explanation
In humans there are 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. Each pair connects the spinal cord with a specific region of the body Answer : (a)
Q.44
During development of action potential in a nerve fibre, positive and negative charges on outer and inner side of axon membrane are reversed due to
0%
a) Excretion of all K+ ions
0%
b) More K+ ions enter than Na+ ions leave the axon
0%
c) More Na+ ions enter the axon than K+ ions leave the same
0%
d) All Na+ ions enter the axon
Explanation
Action potentials are caused when different ions cross the neuron membrane. A stimulus first causes sodium channels to open. Because there are many more sodium ions on the outside, and the inside of the neuron is negative relative to the outside, sodium ions rush into the neuron than K+ ions leave the same Answer : (c)
Q.45
In man, abducens nerve is injured . Which one of the following functions will be affected?
0%
a) Movement of eye ball
0%
b) Movement of tongue
0%
c) Swallowing
0%
d) Movement of neck
Explanation
Lateral rectus muscle of eye. It is the only muscle innervated by the abducens nerve, Answer : (a)
Q.46
Human ear ossicles are
0%
a) Incus and stapes
0%
b) Incus, malleus and stapes
0%
c) Stapes
0%
d) Incus and malleus
Explanation
The ossicles are three bones in either middle ear.Incus, malleus and stapes also kown as hammer, anvil, and stirrup Answer : (b)
Q.47
Pons, cerebellum and medulla constitute … [ kerala 2009]
0%
a) Fore brain
0%
b) Mid brain
0%
c) Hind brain
0%
d) Cerebral hemispheres
Explanation
Pons, cerebellum and medulla constitute Hind brain Answer : (c)
Q.48
Size of pupil is controlled by
0%
a) Ciliary muscles
0%
b) Suspensory ligaments
0%
c) Cornea
0%
d) Iris muscles
Explanation
Light enters the eye through the pupil, and the iris regulates the amount of light by controlling the size of the pupil. Answer : (d)
Q.49
H- shaped grey matter is found in
0%
a) Spinal cord
0%
b) Cerebellum
0%
c) Cerebrum
0%
d) Medulla
Explanation
White matter consisting of myelinated axons passing to and from the brain, or different segments of the spinal cord. Gray matter consisting of nerve cell bodies and interneurons Answer : (a)
Q.50
Reflex action ( withdrawal of hand from heat source ) is controlled by
0%
a) Sympathetic nervous system
0%
b) Autonomic nervous system
0%
c) Spinal cord
0%
d) Peripheral nervous system
Explanation
During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has first negative charge, then positive and again negative by repolarization. Answer : (c)
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