MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
NEET
NEET Biology MCQ
Control And Coordination Mcq
Quiz 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Q.1
Brain ventricles are lined by
0%
a) Neurons
0%
b) Schwann cells
0%
c) Neuroglia
0%
d) Ependymal cells
Explanation
The Ventricles of the Brain. The ventricles are structures that produce cerebrospinal fluid, and transport it around the cranial cavity. They are lined by ependymal cells, which form a structure called the choroid plexus Answer : (d)
Q.2
Which cranial nerve is purely sensory
0%
a) Abducens
0%
b) Auditory
0%
c) Vagus
0%
d) Spinal accessory
Explanation
Cranial nerves I (The Olfactory Nerve), II(The Optic Nerve), and VIII(The Vestibulocochlear Nerve) are pure sensory nerves. Cranial nerves III(Oculomotor), IV(Trochlear), VI(Abducens), XI(Accessory), and XII(Hypoglossal) are pure motor nerves. Cranial nerves V(Trigeminal), VII(Facial), IX(Glossopharyngeal), and X(Vagus) are mixed sensory and motor nerves. Answer : (b)
Q.3
Glaucoma is due to
0%
a) Blocking of canal of Schlemm
0%
b) Drying up of vitreous humor
0%
c) Increased size of eye
0%
d) Opacity of lens
Explanation
Glaucoma, disease caused by an increase in pressure within the eye as a result of blockage of the flow of aqueous humour. Canal of Schlemm, from which the aqueous humour flows into blood vessels. Blockage of the aqueous humour flow causes increased pressure in the posterior chamber Answer : (a)
Q.4
The chemical causing transmission of nerve impulse across synapse or end plate is … [ CPMT 2009]
0%
a) Choline
0%
b) Acetylcholine
0%
c) Cholinesterase
0%
d) Adrenaline
Explanation
Acetylcholine is an organic chemical that functions as a neurotransmitter-a chemical released by nerve cells to send signals to other cells. Answer : (b)
Q.5
The chemical causing the transmission of the nerve impulse across synapse/end plate is
0%
a) Choline esterase
0%
b) Acetylcholine
0%
c) Choline
0%
d) Adrenaline
Explanation
Acetylcholine is a neurotransmitter, which is a chemical released by a nerve cell or neuron Answer : (b)
Q.6
Nerve gas affects neuromuscular working by … [ BHU 2012]
0%
a) Enhancing release of acetylcholine
0%
b) Inhibiting acetylcholinesterase
0%
c) Inhibiting release of acetylcholine
0%
d) Blocking acetylcholine receptors
Explanation
Nerve gas is nerve agents. Nerve agents are a class of phosphorus-containing organic chemicals that disrupt the mechanisms by which nerves transfer messages to organs. The disruption is caused by blocking acetylcholinesterase. Answer : (b)
Q.7
Which pair has the same meaning
0%
a) Sternum – chest bone
0%
b) Stapes – anvil bone
0%
c) Patella – knee bone
0%
d) Malleus – hammer bones
Explanation
The malleus or hammer is a hammer-shaped small bone or ossicle of the middle ear which connects with the incus and is attached to the inner surface of the eardrum. option "d" correct The sternum or breastbone is a long flat bone located in the central part of the chest. while The sternum is sometimes known as the breastbone. option "a" not correct pair The stapes or stirrup is a bone in the middle ear of humans, The incus or anvil is a bone in the middle ear both are different. Option "b" not correct The patella, also known as the kneecap, The femur (thigh bone), tibia (shin bone), and patella (kneecap) make up the bones of the knee. Option "c" is not correct Answer : (d)
Q.8
Brachial plexus is formed of spinal nerves
0%
a) iv ,v and vi cervical
0%
b) v, vi, vii , viii cervical and i thoracic
0%
c) iv and vii lumbar
0%
d) First three sacral
Explanation
The brachial plexus is a network (plexus) of nerves (formed by the anterior ramus of the lower four cervical nerves and first thoracic nerve (C5, C6, C7, C8, and T1). Answer : (b)
Q.9
The charge on the outer side of neuron is … ….[ HPPMT 2012]
0%
a) +ve
0%
b) –ve
0%
c) Zero
0%
d) Alternate +-ve and +ve
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. Answer : (a)
Q.10
Choose the type of neurons system and type of muscle splaying visceral organs
0%
a) Sympathetic nervous system, voluntary
0%
b) Sympathetic nervous system , involuntary
0%
c) Parasympathetic nervous system , involuntary
0%
d) Both sympathetic and parasympathetic nervous system , involuntary
Explanation
Splay: To lay open the end of a tubular structure by making a longitudinal incision to increase its potential diameter. visceral organs : An organ of the digestive, respiratory, urogenital, and endocrine systems as well as the spleen, the heart, and great vessels. Answer : (d)
Q.11
Area of retia devoid of rods and cones is
0%
a) Yellow spot
0%
b) Blind spot
0%
c) Red spot
0%
d) Black spot
Explanation
Blind spot: There are no photoreceptors (i.e., rods or cones) in the optic disk, and, therefore, there is no image detection in this area. Answer : (b)
Q.12
Which of the following is the largest nerve?
0%
a) Vagus
0%
b) Olfactory
0%
c) Hypoglossal
0%
d) Glossopharyngeal
Explanation
Vagus (Xth) Cranial nerve has the longest and varied area of supply, right from oral cavity to heart, eye, posterior part of tongue, palate, larynx , muscles for respiration to GIT, all are supplied by Vagus or it's associates. The trigeminal nerve (the fifth cranial nerve, or simply CN V) is a nerve responsible for sensation in the face and motor functions such as biting and chewing; it is the largest of the cranial nerves. Answer : (a)
Q.13
Node of Ranvier occurs over … [ Har PMT 2007]
0%
a) Muscle
0%
b) Dendrite
0%
c) Right auricle
0%
d) Axon
Explanation
Answer : (d)
Q.14
Band of fibre which join corpora quadrigemina to cerebellum is called
0%
a) Pons varolii
0%
b) valve of Vieussens
0%
c) Corpus callosum
0%
d) Corpus striatum
Explanation
valve of Vieussens called as anterior medullary velum is a thin, transparent lamina of white matter, . The corpora quadrigemina are four rounded eminences which form the dorsal part of the mid-brain. They are situated above and in front of the anterior medullary velum and superior peduncle, and below and behind the third ventricle and posterior commissure Answer : (b)
Q.15
Arachnoid is
0%
a) Covers cranium
0%
b) Sorrounds pia mater
0%
c) Surrounds dura mater
0%
d) Surrounds heart
Explanation
The arachnoid mater is one of the three meninges, the protective membranes that cover the brain and spinal cord. Pia mater often referred to as simply the pia, is the delicate innermost layer of the meninges, the membranes surrounding the brain and spinal cord. Answer : (b)
Q.16
A characteristic of human cornea is
0%
a) Absence of blood circulation
0%
b) Causes cataract in old age
0%
c) Has lacrimal gland for secretion of tears
0%
d) Secreted by conjunctiva and glandular layer
Explanation
Cornea contains no blood vessels to nourish or protect it against infection. Instead, the cornea receives its nourishment from tears and the aqueous humor (a fluid in the front part of the eye that lies behind the cornea). Answer : (a)
Q.17
Organ of Golgi is the sensing structure formed at the junction of
0%
a) Two nerves
0%
b) Two bones
0%
c) Nerve and muscle
0%
d) Muscle and tendon
Explanation
The Organ of Golgi is located where muscle fibers of skeletal muscle meet tendon Answer : (d)
Q.18
A polarized neuron is the one that is
0%
a) Conducting stimulus
0%
b) At resting potential
0%
c) Having action potential
0%
d) None of the above
Explanation
A neuron that is polarized is at rest potential. At this stage it is not conducting an impulse and has sodium ions on the outside and potassium ions on the inside. Answer : (b)
Q.19
Which is incorrect about Na+
0%
a) Conducts impulse along nerve
0%
b) Transmits impulse across synapse
0%
c) Is reabsorbed in kidney with the help of aldosterone
0%
d) Transports some substances across membrane
Explanation
Neurotransmitters transmit impulse across synapse. Examples of neurotransmitters are Amino acids: glutamate, aspartate, D-serine, γ-aminobutyric acid (GABA), glycine Answer : (b)
Q.20
3rd, 6th, and 11th cranial nerves are
0%
a) Optic , facial and accessory spinal
0%
b) Oculomotor, trigeminal and accessory spinal
0%
c) Trigeminal , abducens and accessory
0%
d) Oculomotor , abducens and accessory spinal
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
Vestibular and tympanic canals of cochlea are connected by
0%
a) Oval window
0%
b) Round window
0%
c) Helicotrema
0%
d) Eustachian canal
Explanation
Vestibular and tympanic canals of cochlea are located in inner ear. Helicotrema is the part of the cochlear labyrinth where the scala tympani and the scalavestibuli meet. It is the main component of the cochlear apex. The hair cells near this area best detect low frequency sounds Answer : (c)
Q.22
Which is not a reflex action?
0%
a) Swallowing of food
0%
b) Shivering in cold
0%
c) Salivation at choicest food
0%
d) Closure of eyes lids by flashing light
Explanation
The act of swallowing has voluntary and involuntary components. The preparatory/oral phase is voluntary, whereas the pharyngeal and esophageal phases are mediated by an involuntary reflex called the swallowing reflex. Answer : (a)
Q.23
Cerebral peduncles connect … ..[ MHTCET
0%
a) Two cerebral hemispheres
0%
b) Cerebrum with diencephalon
0%
c) Corpora quadrigemina
0%
d) Cerebrum with cerebellum
Explanation
The cerebral peduncles help refine our movements. If body movement impulses came straight from the cortex, the movements would seem erratic and clumsy. The peduncles adjust the commands by taking into account where the body parts currently are located before directing the movement, and they sometimes slow down the movement. Answer : (d)
Q.24
Cerebrum is located in part of brain
0%
a) Lower side
0%
b) Extension of brain
0%
c) Forefront
0%
d) None of the above
Explanation
The cerebrum is located in the upper part of the cranial cavity, which is a space inside the top of the skull. Answer : (c)
Q.25
During conduction of nerve impulse
0%
a) Na+ moves out of axoplasm
0%
b) Na+ moves into axoplasm
0%
c) K+ moves into axoplasm
0%
d) Ca2+ moves into axoplasm
Explanation
axoplasmthe cytoplasm of a nerve axon. When a stimulus reaches a resting neuron, the gated ion channels on the resting neuron’s membrane open suddenly and allow the Na+ that was on the outside of the membrane to go rushing into the cell. Answer : (b)
Q.26
Light sensitive cells of eye are present in
0%
a) Cornea
0%
b) Sclera
0%
c) Choroid
0%
d) Retina
Explanation
Light sensitive cells are cones and rods. They are present in the retina. Answer : (d)
Q.27
Direction of nerve impulse is reversed in junction
0%
a) Axo-axonic
0%
b) Axo-dendritic
0%
c) Axo-dendritic-axonic
0%
d) None of the above
Explanation
Axoaxonicreferring to a synapse between the axon of one neuron and the axon of another. Answer : (a)
Q.28
One of the following is the function of cerebellum
0%
a) Appetite
0%
b) Motor coordination
0%
c) Intelligence
0%
d) Sensory processing
Explanation
The cerebellum plays a major role in the predictive timing and coordination Answer : (b)
Q.29
On stimulation sympathetic nervous system
0%
c) Decrease saliva
0%
a) Increase sweat secretion
0%
b) Increase tear secretion
0%
d) All the above
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 : (c)
Q.30
Which ones are gustatoreceptors
0%
a) Rod cells of eyes
0%
b) Cone cells of eyes
0%
c) Taste buds of tongue
0%
d) Receptors in skin
Explanation
Gustatoreceptor: a taste bud on the tongue. Answer : (c)
Q.31
Autonomic nervous system controls
0%
a) Reflex action
0%
b) Sense organs
0%
c) Internal organs
0%
d) Skeletal muscles
Explanation
The autonomic nervous system (ANS) regulates the functions of our internal organs (the viscera) such as the heart, stomach and intestines. Answer : (c)
Q.32
Iter(Aqueduct of Sylvius) is found between
0%
a) Third and fourth ventricles
0%
b) Two lateral ventricles
0%
c) Lateral ventricles and third ventricles
0%
d) Rhinocoel and lateral ventricles
Explanation
Sylvian aqueduct or aqueduct of Sylvius) is within the midbrain. It contains cerebrospinal fluid (CSF) and connects the third ventricle to the fourth ventricle, located dorsal to the pons and ventral to the cerebellum Answer : (a)
Q.33
Adrenaline is equivalent to neurotransmitter … .. [ Odisha 2009]
0%
a) GABA
0%
b) Epinephrine
0%
c) Nor-epinephrine
0%
d) Serotonin
Explanation
Epinephrine is also called adrenaline, derived from the name of its gland Answer : (b)
Q.34
Supply of blood to visceral organs is controlled by
0%
a) SNS, involuntary
0%
b) SNS, voluntary
0%
c) PNS, involuntary
0%
d) SNS, PNS, involuntary
Explanation
Visceral: Referring to the viscera, the internal organs of the body, specifically those within the chest (as the heart or lungs) or abdomen (as the liver, pancreas or intestines). The somatic nervous system (SNS) is the portion of the nervous system responsible for voluntary body movement and for sensing external stimuli. All five senses are controlled by this system The peripheral nervous system (PNS) The PNS can be broken down into two systems: the autonomic nervous system, which regulates involuntary actions such as breathing and digestion, and the somatic nervous system, which governs voluntary action and body reflexes. Answer : (d)
Q.35
Receptor absent over tongue in
0%
a) Thermoreceptor
0%
b) Gustatoreceptor
0%
c) Photoreceptor
0%
d) None of these
Explanation
Photoreceptor found in eye Answer : (c)
Q.36
Broca area controls
0%
a) Breathing
0%
b) Movement of vocal cords
0%
c) Movement of tongue
0%
d) Both b. and c.
Explanation
Broca's area is involved in several functions of the body including:Speech Production, Facial Neuron Control,Language Processing Answer : (b)
Q.37
During resting condition, a nerve fibre becomes
0%
a) +vely charged on outside and –vely charged on inside
0%
b) +vely charged on both outside and inside
0%
c) –vely charged on outside and +vely charged on inside
0%
d) –vely charged on both outside and inside
Explanation
Resting potential, the imbalance of electrical charge that exists between the interior of electrically excitable nerve cells and their surroundings. The resting potential of electrically excitable cells lies in the range of −60 to −95 millivolts (1 millivolt = 0.001 volt), with the inside of the cell negatively charged. If the inside of a cell becomes more electronegative (i.e., if the potential is made greater than the resting potential), the membrane or the cell is said to be hyperpolarized. If the inside of the cell becomes less negative (i.e., the potential decreases below the resting potential), the process is called depolarization. Answer : (a)
Q.38
The stato-acoustic receptor responds to changes in the
0%
a) light and pressure
0%
b) pain and pressure
0%
c) sound and equilibrium
0%
d) pressure and touch
Explanation
The organs for hearing and balance in frogs are the stato-acoustic receptors. The frog ears that is divided into the middle ear and internal ear. The middle portion of the ear is made of columella auris and the cartilaginous stapedial plate. The internal ear receives vibrations from the middle ear that is responsible for hearing and balancing. Answer : (c)
Q.39
Which centre is stimulated during increase in body temperature … ..[ WB 2011]
0%
a) Anterior hypothalamus
0%
b) Posterior hypothalamus
0%
c) Limbic system
0%
d) Red nucleus
Explanation
The anterior hypothalamic nucleus is a nucleus of the hypothalamus. Its function is thermoregulation (cooling) of the body. Damage or destruction of this nucleus causes hyperthermia. Answer : (a)
Q.40
Parasympathetic nervous system is not involved in
0%
a) Peristalsis
0%
b) Secretion of saliva
0%
c) Dilation of pupil
0%
d) Excitation of reproductive organs
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 : (c)
Q.41
3rd, 6th and 11th cranial nerves are …. [ BHU 2007]
0%
a) Optic, facial and accessory spinal
0%
b) Oculomotor, trigeminal and accessory spinal
0%
c) Trigeminal, abducens and vagus
0%
d) Oculomotor, abducens and accessory spinal
Explanation
The 3rd, 6th and 11th cranial nerves are Oculomotor, abducens and spinal accessory Answer : (d)
Q.42
Which foramen is paired in mammalian brain? … [ mPPMT 2009]
0%
a) Foramen of Monro
0%
b) Foramen of Magendie
0%
c) Interventricular foramen
0%
d) Foramen of Luschka
Explanation
a) Foramen of Monro : the small opening (on both the right and left sides) that connects the third ventricle in the diencephalon with the lateral ventricle in the cerebral hemisphere. b)Foramen of Magendie: a passage through the midline of the roof of the fourth ventricle of the brain that gives passage to the cerebrospinal fluid from the ventricles to the subarachnoid space. c)Interventricular foramen: The short, often slitlike passage that, on both the left and right sides, connects the third brain ventricle (of the diencephalon) with the lateral ventricles (of the cerebral hemispheres); the passage is bounded anteriomedially by the column of fornix and posterolaterally by the anterior pole of the thalamus. d) Foramen of Luschka: The two lateral apertures provide a conduit for cerebrospinal fluid to flow from the brain's ventricular system into the subarachnoid space Answer : (d)
Q.43
In human beings total visual field and stereoscopic visual field are respectively
0%
a) 140° and 52°
0%
b) 140° and 26°
0%
c) 180° and 140°
0%
d) 180° and 26°
Explanation
The visual field: refers to the total area in which objects can be seen in the side (peripheral) vision as you focus your eyes on a central point. Stereoscopic visual field: The single perception of a slightly different image from each eye. Answer : (c)
Q.44
Arbor vitae is
0%
a) Tree-like structure in cerebrum
0%
b) Tree of life in cerebellum
0%
c) End part of spinal cord
0%
d) None of the above
Explanation
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. Answer : (b)
Q.45
Part of brain involved in interpretation of storage of information and initiation of response on the basis of past experience is
0%
a) Motor area
0%
b) Cerebellum
0%
c) Sensory area
0%
d) Association area
Explanation
Association area: an area of the cerebral cortex that functions in linking and coordinating the sensory and motor areas Answer : (d)
Q.46
Roof of cerebrum is called … ..[ MHT CET 2010]
0%
a) Pallium
0%
b) Epithalamus
0%
c) Choroid plexus
0%
d) Centrocoel
Explanation
Pallium refers to the layers of gray and white matter that cover the upper surface of the cerebrum in vertebrates Answer : (a)
Q.47
Fourth cranial nerve is
0%
a) Trigeminal
0%
b) Abducens
0%
c) Trochlear
0%
d) Optic
Explanation
The trochlear nerve, also called the fourth cranial nerve Answer : (c)
Q.48
How many laminae are present in grey matter of spinal cord .. [ WB 2010]
0%
a) Four
0%
b) Six
0%
c) Eight
0%
d) Ten
Explanation
The Rexedlaminae comprise a system of ten layers of grey matter (I-X), identified in the early 1950s by BrorRexed to label portions of the grey columns of the spinal cord Answer : (d)
Q.49
Sensory neurons of retina are
0%
a) Maculae and cristae
0%
b) Pacinian and ruffini’s corpuscles
0%
c) Rods and cones
0%
d) All the above
Explanation
Rods and cones are sensory neurons of eye as they transmit information to other cells. Answer : (c)
Q.50
Unidirectional transmission of nerve impulse is maintained by
0%
a) Synapses
0%
b) Myelin sheath
0%
c) Membrane polarity
0%
d) Interneurons
Explanation
The transmission of a nerve impulse along a neuron from one end to the other occurs as a result of electrical changes across the membrane of the neuron. Answer : (a)
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page