| the vagus nerve is the cranial nerve numbering | 10th |
| sensation of stomach pain is due to | interoceptors |
| otorhinolaryngology is the study of | ENT |
| the 5th cranial nerve of frog is called | trigeminal nerve |
| excessive stimulation of vagus nerve in humans may lead to | irregular contraction of diaphragm |
| a person is wearing spectacles with concave lenses for correcting vision. while not using the glasses, the image of a distant object in his case will be formed | on the yellow spot |
| unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that | neurotransmitters are released by the axon endings and not by dendrites |
| uses _______________ to dilate the pupil of the eye an uses ____________ to constrict the pupil of the eye | sympathetic nervous system, parasympathetic nervous system |
| bipolar nerve cells are present in | retina of eye |
| multipolar nerve cells are present in | dorsal root ganglia of spinal cord |
| neurons recieve signals through their____ and send signals to other neurons through their ______ | cell bodies and denrites, axons |
| which of the following ions are required for nerve conditions | Ca++, Na+ an K+ |
| receptor sites for neurotransmitter are present on | post synaptic membrane |
| the human hind brain comprises three parts one of which is | cerebellum |
| when a neuron is in resting state the axonal membrane is | comparatively more permeable to K+ ions and nearly impermeable to Na+ ion |
| 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 change? | first negative, then positive and again back to negative |
| in a man, abducens nerve is injured. which one of the following functions will be affected ? | movement of the eye ball |
| one of the examples of the action of ANS is | peristalsis of the intestine |
| CNS is mostly made of | associated neurons |
| one function of parasympathetic neurons system is | constriction of pupil |
| third ventricle of brain is also known as | diacoel |
| which of the following cranial nerves can regulate heart beat | X |
| ivan pavlov performed experiments on | conditioned reflexes |
| good vision depends on adequate intake of carotene rich food | vitamin A derivatives are formed from carotene
retinal is a derivative of vitamin A
retinal is a light absorbing part of the visual photopigments |
| photosensitive compounds in human eye is made up of | opsin and retinal |
| a gymnast is able to balance his body upside down even in the darkness because of | vestibular apparatus |
| which one of the following is the correct difference between rod cells and cone cells of our retina | visual acuity; rod cells high , cone cells low |
| in the chemistry of vision in mammals, the photosensitive substances is called | rhodopsin |
| retina is most sensitive at | fovea centralis |
| iris is part of | sclerotic and choroid |
| afferent nerve fibre carries impulses from | receptor to central nervous system |
| the parts of the neurons that perform basic cellular functions such as protien synthesis are the | soma |
| speed of impulse on nerves in mammals is | 100 m/sec |
| a short periord during which a nerve is unable to conduct nerve impulse is called | refractory period |
| if myelin sheath is continued in myelinated nerve fibre than what will happen in neural conduction | conduction is stopped |
| cerebral hemisphere of mammals consist of | outer gray matter and central white matter |
| foramen of monro is an aperture found between | lateral venttricle and third ventricle |
| lateral ventricle are found in | brain |
| largest cavity in brain is called | paracoel |
| arbor vitae is present in | cerebellum |
| the gray matter differs from white matter in the | absence of myelin sheath |
| richly vascular layer with lots of blood capillaries | piamater |
| broca's area is located in | lateral part of frontal lobe |
| when medulla oblongata is compressed then what happens | immediately dies |
| ventral root of spinal nerve has | motor fibres |
| lower part of filum terminale has only | piamater |
| weight of spinal cord is | 35 gm |
| a ramus communicans consists of | white and gray ramus |
| which cranial nerves are sensory | 1,2,8 |
| purely motor cranial nerves includes | 3,4,6 and 11 |
| which nerve is purely motor | abducens |
| the 3rd, 6th and 11th cranial nerve in mammals are respectively | occulomotor, abducens and spinal accessory |
| how many pairs of cranial nerves are purely sensory | three |
| optic nerve is the | second cranial nerve |
| the nerves leading to the central nervous system is called | afferent |
| smallest cranial nerve | abducens |
| the two additional cranial nerves present in mammals are | spinal accessory and hypoglossal |
| the cranial and spinal nerves are included under | peripheral nervous system |
| which cranial nerve provides taste sensation to anterior 2/3rd part of tongue | facial |
| the focal length of the lens in eye is controlled by | ciliary muscles |
| which of the following processes occurs in only animals | nervous control |
| drinking of alcohol severely affects | cerebellum |
| sight of delicious food usually makes mouth watery it is a | neural response |
| the nervous system is derived from | ectoderm |
| epithalamus is situated on the | roof of diencephalon |
| pigmented layer in eye is called | retina |
| the fluid found in semicircular canals of internal ear of human is | endolymph |
| which structure helps a person to maintain equilibrium | semicircular canals |
| otolith(otoconia) are CaCO3 particles found in | endolymph |
| stirrup shaped ear ossicle | stapes |
| three layers in eye ball from inside to outside are | retina,choroid and sclerotic |
| the tympanic cavity is | middle ear |
| space between cornea and lens | aqueous chamber |
