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Q.1
Which one carry both sensory and motor fibres?
0%
a) Optic and oculomotor
0%
b) Vagus and facial
0%
c) Auditory and olfactory
0%
d) Trochlear and trigeminal
Explanation
Cranial Nerve
Name
Function
I
The Olfactory Nerve
Sense of Smell
II
The Optic Nerve
Vision
III
The Oculomotor Nerve
Mainly motor
IV
The Trochlear Nerve
Motor
V
The Trigeminal Nerve
Both sensory and motor
VI
The Abducent Nerve
Mainly motor
VII
The Facial Nerve
Both sensory and motor
VIII
The Vestibulocochlear Nerve
Mostly sensory
IX
The Glossopharyngeal Nerve
Both sensory and motor
X
The Vagus Nervehistorically cited as the pneumogastric nerve
Both sensory and motor
XI
Accessory nerve
Mainly motor
XII
Hypoglossal
Mainly motor
Answer : (b)
Q.2
Specific part of hypothalamus responsible for physiological sweat secretion is … [ WB 2009]
0%
a) Sra-optic nucleus
0%
b) Para ventricular nucleus
0%
c) Pars distalis
0%
d) Median eminence
Explanation
The median eminence is a part of the hypothalamus from which regulatory hormones are released Answer : (d)
Q.3
Which one is absent in neurons?
0%
a) Neurilimma
0%
b) Axon
0%
c) Sarcolemma
0%
d) Dendrites
Explanation
Sarcolemma: the fine transparent tubular sheath which envelops the fibres of skeletal muscles. Answer : (c)
Q.4
The tympanic cavity communicates with the pharynx by a pair of
0%
a) Bartholin’s ducts
0%
b) Internal nares
0%
c) Eustachian tubes
0%
d) None of these
Explanation
The tympanic cavity is an air-filled compartment surrounded by bone that is separated from the external ear by a thin tympanic membrane (tympanum) and is in direct communication with the pharynx via the auditory tube (also known as theeustachian or pharyngotympanic tube). Answer : (c)
Q.5
Third ventricle of brain is also known as
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a) Metacoel
0%
b) Rhincoel
0%
c) Paracoes
0%
d) Diacoel
Explanation
The brain is enclosed in four ventricles - Lateral ventricles (1 and 2) or paracoes. the third ventricle or diacoel and fourth ventricle or myelocoel Answer : (d)
Q.6
You are watching a horror movie and you notice that your heart is beating fast and mouth is dry. It is because of
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a) Fight and flight response
0%
b) Sympathetic nervous system
0%
c) Both a. and b.
0%
d) Autonomic nervous system
Explanation
The sympathetic nervous system directs the body's rapid involuntary response to dangerous or stressful situations. A flash flood of hormones boosts the body's alertness and heart rate, sending extra blood to the muscles. During the Fight-or-Flight Response. In response to acute stress, the body's sympathetic nervous system is activated due to the sudden release of hormones. Answer : (c)
Q.7
Skeletal muscles are controlled by … [ DPMT 2009]
0%
a) Somatic nerves
0%
b) Autonomic nerves
0%
c) Parasympathetic nerves
0%
d) Sympathetic nerves
Explanation
The somatic nervous system (SoNS or voluntary nervous system) is the part of the peripheral nervous system associated with skeletal muscle voluntary control of body movements. Answer : (a)
Q.8
Assertion. Imbalance in Na+, K+ and proteins generates the resting potential. Reason. To maintain unequal distribution of Na+ and K+ , neurons use electrical energy
0%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
0%
b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
0%
c) Assertion is true but, Reason is false
0%
d) Assertion is false but, Reason is true
Explanation
The cell has a nifty protein spanning the membrane called the K/Na pump. It uses energy (in the form of ATP) to pump Na out, K in, maintaining the charge and concentration difference between inside and out the resting potential as it is known. Answer : (c)
Q.9
Arbor-vitae is found in
0%
a) Cerebrum
0%
b) Medulla
0%
c) Pons
0%
d) Cerebellum
Explanation
The arbor vitae is the cerebellar white matter, Greymatter, Neuroglia cells so called for its branched, tree-like appearance and is present in both cerebellum hemispheres. Answer : (d)
Q.10
Transverse nerve fibres found in hind brain represent … [ MHTCET 2010]
0%
a) Crura cerebri
0%
b) Pons varolli
0%
c) Arbor vitae
0%
d) Choroid plexus
Explanation
Hindbrain: is composed of the medulla oblongata, the pons, and the cerebellum. Cruracerebri: A pair of bands joining the cerebrum to the medulla and pons. Pons varolii :The pons is also called the pons Varolii ("bridge of Varolius") Arbor vitae is the cerebellar white matter, so called for its branched, tree-like appearance. In some ways it more resembles a fern and is present in both cerebellar hemispheres. It brings sensory and motor information to and from the cerebellum. The arbor vitae is located deep in the cerebellum. The choroid plexus is a plexus of cells that produces the cerebrospinal fluid in the ventricles of the brain. Answer : (b)
Q.11
In stomach pain, the associated nerve cells are … .. [ Wardha 2011]
0%
a) Interneurons
0%
b) Commissural interneurons
0%
c) Motor neurons
0%
d) Sensory neurons
Explanation
Within the gastrointestinal tract, vagal sensory neurons monitor stomach volume and intestinal contents, and responsive neural circuits regulate digestive physiology Answer : (d)
Q.12
Cranial nerve called dentist’s nerve is
0%
a) Optic
0%
b) Auditory
0%
c) Trigeminal
0%
d) Oculomotor
Explanation
The trigeminal nerve is a nerve responsible for sensation in the face and motor functions such as biting and chewing Answer : (c)
Q.13
Respiratory centre of brain is sensitized by
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a) More O2 concentration in blood
0%
b) More blood in lungs
0%
c) More blood in brain
0%
d) More CO2 concentration in blood
Explanation
Sensitized respiratory center is confronted with high brain levels of CO2 . When the brain CO2 levels dissipate Answer : (d)
Q.14
An example of autonomous nervous system is
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a) Swallowing
0%
b) Pupillary reflex
0%
c) Peristalsis of intestine
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d) Knee-jerk response
Explanation
Peristalsis: is a radially symmetrical contraction and relaxation of muscles that propagates in a wave down a tube, in an anterograde direction. Intestine function is controlled by autonomous nerve system, due to peristalsis digested food is moved in intestine Answer : (c)
Q.15
Olfactory membrane is connected with
0%
a) Taste
0%
b) Vision
0%
c) Smell
0%
d) Hearing
Explanation
Olfactory: relating to the sense of smell Answer : (c)
Q.16
Optic lobes in humans are represented by corpora .. ..[ AMU 2012]
0%
a) Bigemina
0%
b) Quadrigemina
0%
c) Arenacea
0%
d) Striata
Explanation
Optic lobe may refer to: homologues of the Corpora_quadrigemina in mammal midbrains in lower vertebrates; Answer : (b)
Q.17
Which part of human brain is largest? …[ WB 2009]
0%
a) Cerebrum
0%
b)Cerebellum
0%
c) Thalamus
0%
d) Medulla
Explanation
The cerebrum is the largest part of the human brain. Answer : (a)
Q.18
Which cranial nerve is present in Rabbit but absent in frog? [ Har PMT 2007]
0%
a) Glossopharyngeal
0%
b) Hypoglossal
0%
c) Olfactory
0%
d) Optic
Explanation
Frog have I to X only 10 cranial nurves Accessory nerve (XI):Turning movements of the head, movements of the shoulder and viscera, voice production. Hypoglossal (XII):Tongue movements Both Cranial nerves are absent in frog Answer : (b)
Q.19
Hearing is controlled by
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a) Frontal lobes
0%
b) Parietal lobes
0%
c) Temporal lobes
0%
d) Occipital lobes
Explanation
The temporal lobe is involved in primary auditory perception, such as hearing, and holds the primary auditory cortex. Answer : (c)
Q.20
Cranial nerves supplying eyes are
0%
a) 3,4,5
0%
b) 4,6,7
0%
c) 4,5,6
0%
d) 3,4,6
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 : (d)
Q.21
Nervous band connecting the two cerebral hemispheres is
0%
a) Corpus albicans
0%
b) Corpus callosum
0%
c) Corpus striatum
0%
d) Corpus spongiosum
Explanation
The corpus callosum is a thick band of nerve connects the left and right sides of the brain allowing for communication between both hemispheres. The corpus callosum transfers motor, sensory, and cognitive information between the brain hemispheres. Answer : (b)
Q.22
Light rays entering the eye is controlled by
0%
a) Pupil
0%
b) Iris
0%
c) Cornea
0%
d) Lens
Explanation
Pupil: an opening in the center of the iris that changes size to control how much light is entering the eye. Answer : (a)
Q.23
Fifth cranial nerve is
0%
a) Optic
0%
b) Trigeminal
0%
c) Abducens
0%
d) Facial
Explanation
The fifth cranial nerve is the trigeminal nerve. It functions both as the chief nerve of sensation for the face and the motor nerve controlling the muscles of mastication (chewing). Answer : (b)
Q.24
Tongue has
0%
a) Baroreceptors
0%
b) Olfactoreceptor
0%
c) Gustatoreceptors
0%
d) Tangoreceptors
Explanation
Online Gustato receptors Practice and Preparation Tests cover Answer : (c)
Q.25
Myelin sheath covers
0%
a) Tendon
0%
b) Nerve fibres
0%
c) Collagen fibre
0%
d) Muscle fibre
Explanation
The myelin sheath is a layer of fat and protein that covers the axon of a neuron, or nerve cell. Answer : (b)
Q.26
Glands whose secretions pick up odoriferous substances to simulate olfactory nerve are
0%
a) Bidder’s glands
0%
b) Cowper’s glands
0%
c) Meibomian glands
0%
d) Bowman’s glands
Explanation
Bowman's glands: Also known as Olfactory glands responsible for smell Answer : (d)
Q.27
Pneumotaxic centre which can moderate the function of respiratory rhythm centre is present at … [ kerala 2011]
0%
a) Pons
0%
b) Spinal cord
0%
c) Thalamus
0%
d) Right cerebral hemisphere
Explanation
Pneumotaxic center: one of the four respiratory centers; located in the upper, rostral part of the pons; rhythmically inhibits inspiration. Four respiratory groups are: Two in the medulla Inspiratory center: (Dorsal respiratory group); Expiratory center (Ventral respiratory group); Two groups in the pons:Pneumotaxic center; Apneustic center Answer : (a)
Q.28
Concave lens is employed to correct
0%
a) Presbyopia
0%
b) Hypermetropia
0%
c) Cataract
0%
d) Myopia
Explanation
A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia). Answer : (d)
Q.29
In myasthenia gravis, acetylcholine … ..[ AMU 2010]
0%
a) receptor on motor end plate are reduced
0%
b) Secretion from nerve terminals is reduced
0%
c) Esterase activity is prohibited
0%
d) Secretion from nerve terminals is enhanced
Explanation
Myasthenia gravis: is a neuromuscular disease is caused by a defect in the transmission of nerve impulses to muscles. The neuromuscular junction is apparently affected, acetylcholine, no longer produces the contractions necessary for muscle movement or we can say acetylcholine receptor on motor end plate are reduced Answer : (a)
Q.30
Broca’s area of speech is found in … [ WB 2008]
0%
a) Frontal lobe
0%
b) Parietal lobe and partly in temporal lobe
0%
c) Temporal lobe
0%
d) Temporal and occipital lobes
Explanation
Broca's area is a region in the frontal lobe of the dominant hemisphere (usually the left) of the hominid brain with functions linked to speech production. Broca's area plays a significant role in language production and language comprehension; production of language Answer : (a)
Q.31
Simple two-neuron reflex consists of
0%
a) Sensory neuron
0%
b) Effector neuron
0%
c) Both a. and b.
0%
d) Sensory neuron, effector neuron and spinal cord
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. The nerve pathway involved in a reflex action, including at its simplest a sensory nerve and a motor nerve with a synapse between. Answer : (d)
Q.32
Ora serrata is
0%
a) Part of retina
0%
b) Present in utriculus of ear
0%
c) Gland present in oral cavity of frog
0%
d) Oral cavity of protochordates
Explanation
The oraserrata is the serrated junction between the retina and the ciliary body. This junction marks the transition from the simple non-photosensitive area of the retina to the complex, multi-layered photosensitive region. Answer : (a)
Q.33
Integration of visual, tactile and auditory input occurs in … ..[ kerala 2012]
0%
a) Corpus callosum
0%
b) Limbic system
0%
c) Medulla oblongata
0%
d) Midbrain
Explanation
We found that multisensory integration of visual and tactile stimuli occurred at moderately long latencies in association cortical areas in the parietal and frontal lobes, but not at short latencies in visual or tactile sensory cortices Answer : (d)
Q.34
One function of parasympathetic nervous system is
0%
a) Contraction of hair muscles
0%
b) Stimulation of sweat glands
0%
c) Acceleration of heart beat
0%
d) Constriction of pupils
Explanation
Organ
Effect of sympathetic nervous system
Glands (nasal, lacrimal, salivary, gastric, pancreas)
inhibits secretory activity; causes vasoconstiction of blood vessels supplying glands
Eye
Dilates pupil
Heart
Increases rate and force of contraction
Lungs
Dilates bronchioles via circulating adrenaline
Sweat Glands
stimulates sweating
Kidney
Increases renin secretion
Answer : (d)
Q.35
Bitter taste is perceived by buds present on the tongue at
0%
a) Posterior part
0%
b) Tip
0%
c) Lateral side
0%
d) Ventral side
Explanation
Answer : (a)
Q.36
Black pigment of eye which reduces internal reflection is located in
0%
a) Retina
0%
b) Iris
0%
c) Sclerotic
0%
d) Cornea
Explanation
Black pigment of eye which reduces internal reflection is located in Retina Answer : (a)
Q.37
Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells. Which of the following cells are least likely to be replaced by new cells
0%
a) Liver cells
0%
b) Neurons
0%
c) Malpighian layer of skin
0%
d) Osteocytes
Explanation
Neuron cells are least likely to be replaced by new cells. These cells are specilalised to conduct electrochemical current. Nerve cells do not have the capability of division as they are restricted at G0- phase of the cell- cycle. Answer : (b)
Q.38
Acetylcholine takes part in
0%
a) Enhancing membrane permeability
0%
b) Synaptic transmission
0%
c) Synaptic delay
0%
d) None of the above
Explanation
Neuro transmitters Acetylcholine , are stored in vesicles in the presynaptic terminal. Acetylcholineis secreted across synaptic clefts, where it binds to the post synaptic membrane and causes a change in the permeability of the postsynaptic cell, which results in an excitatory post-synaptic potential. Answer : (b)
Q.39
Which one is the spinal nerve?
0%
a) Trigeminal
0%
b) Hypoglossal
0%
c) Olfactory
0%
d) None of the above
Explanation
Option ‘a’ to ‘c’ are cranial verves Answer : (d)
Q.40
Match the columns … [ kerala 2008]
a) Sacral nerves
One pair
b) Thoracic nerves
Eight pairs
c) Coccygeal nerves
Sven pairs
d) Cervical nerves
Twelve pairs
- - - -
Five pairs
0%
a) a – 5, b – 4, c – 1, d – 2
0%
b) a – 4, b – 1, c- 3, d – 2
0%
c) a – 5, b – 3, c – 1, d – 2
0%
d) a – 3, b – 4, c – 2, d – 1
Explanation
Cervical nerves : 8 pairs Thoracic nerves: 12 pairs Lumbar nerves: 5 pairs Sacral nerves: 5 pairs Coccygeal nerve: 1 pair last 31st Answer : (a)
Q.41
Structure connected with vision of Rabbit is
0%
a) Corpus callosum
0%
b) Corpus quadrigemina
0%
c) Corpus albicans
0%
d) Hippocampus
Explanation
Corporaquadrigemina : are two pairs of spherical optic lobs representing the dorsal part of midbrain. In rabbit it is associated with vision Answer : (b)
Q.42
Intellectual ability is controlled by
0%
c) Temporal lobe
0%
a) Frontal lobe
0%
b) Parietal lobe
0%
d) Occipital lobe
Explanation
Frontal lobe: The function of the lobe involves the ability to project future consequences resulting from current actions it is also called intellectual ability Answer : (a)
Q.43
It is present in rod and useful for night vision
0%
a) Rhodopsin
0%
b) VITAMIN C
0%
c) VITAMIN K
0%
d) MELANIN
Explanation
Rhodopsin (also known as visual purple) is a light-sensitive receptor protein involved in visual phototransduction. Rhodopsin is a biological pigment found in the rods of the retina. Rhodopsin is extremely sensitive to light, and thus enables vision in low-light conditions. Answer : (a)
Q.44
The order of three layers of cells in retina of human eye from inside to outside is
0%
a) Bipolar cells, photoreceptors, ganglion cells
0%
b) Ganglion cells, rods, cones
0%
c) Photoreceptors cells, bipolar cells, ganglion cells
0%
d) Ganglion cells, photoreceptor cells, bipolar cells
Explanation
Answer : (c)
Q.45
Area of the retina having the maximum number of cones is
0%
a) Conjunctiva
0%
b) Iris
0%
c) Blind spot
0%
d) Fovea centralis
Explanation
The fovea centralis (the term fovea comes from the Latin, meaning pit or pitfall) is a small, central pit composed of closely packed cones in the eye. The fovea is responsible for sharp central vision (also called foveal vision), which is necessary in humans for activities where visual detail is of primary importance, such as reading and driving. Answer : (d)
Q.46
Occipital lobe is connected with
0%
a) Smell
0%
b) Vision
0%
c) Hearing
0%
d) Speech
Explanation
the posterior lobe of each cerebral hemisphere that bears the visual cortex and has the form of a 3-sided pyramid. The occipital lobe is the visual processing center of the mammalian brain Answer : (b)
Q.47
Retina is most sensitive at
0%
a) Optic disc
0%
b) Periphery
0%
c) Macula lutea
0%
d) Fovea centralis
Explanation
The fovea centralis (the term fovea comes from the Latin, meaning pit or pitfall) is a small, central pit composed of closely packed cones in the eye. Answer : (d)
Q.48
Cytons of both central and autonomic sensory fibres occur in
0%
a) Spinal ganglia
0%
b) Dorsal part of spinal cord
0%
c) Ventral part of spinal cord
0%
d) Autonomic ganglia
Explanation
Answer : (b)
Q.49
In a similarity with photographic camera, retina acts as
0%
a) Shutter
0%
b) Lens
0%
c) Diaphragm
0%
d) Film
Explanation
Answer : (d)
Q.50
Branch of spinal nerve that splies skin of back is … ..[ MHT CET 2008]
0%
a) Ramus ventralis
0%
b) Ramus dorsalis
0%
c) Ramus meningeal
0%
d) Ramus communicans
Explanation
The ventral ramus (Ramus ventralis) is the anterior division of a spinal nerve. It branches into the dorsal ramus, ventral ramus, and rami communicans. The dorsal ramus of spinal nerve (or posterior ramus of spinal nerve, or posterior primary division) Posterior rami carry visceral motor, somatic motor, and sensory information to and from the skin and deep muscles of the back. Ramus meningeal One of the primary branches of a spinal nerve that reenters the vertebral foramen and supplies the meninges and vertebralcolumn. are branches which communicate between the spinal nerves and the sympathetic trunk. Ramus communicans Each spinal nerve receives a branch called a gray ramus communicans from the adjacent paravertebral ganglion of the sympathetic trunk. Answer : (b)
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