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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
Which of the following is an example of negative feedback loop in humansA. Secretion of sweat glands and constriction of skin blood vessels when it is too hot.B. Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold.C. Secretion of tears after falling of sand particles in to the eyeD. Salivation of mouth at the sight of delicious food. |
| Answer» Correct Answer - B | |
| 352. |
Potential difference across resting membrane is negatively charged. This is due to differential distribution of the following ions.A. `Na^(+)` and `K^(+)` ionsB. `CO_(3)^(2-)` and `Cl^(-)` ionsC. `Ca^(2+)` and `Mg^(2+)` ionsD. `Ca^(+4)` and `Cl^(-)` ions |
| Answer» Correct Answer - A | |
| 353. |
How many pairs of cranial nerves originate from the brain of ratA. 12B. 8C. 9D. 11 |
| Answer» Correct Answer - a | |
| 354. |
The incorrectly matched pair isA. Cerpora quadrigemina - canal that passes through midbrainB. Corpora quadrigemina - Four rounded swellings present on ventral portion of midbrainC. Cerebrum - Very convoluted surfaceD. Medulla oblongata - Controls gastric secretions. |
| Answer» Correct Answer - B | |
| 355. |
The interneurons are located in theA. Sensory receptorsB. Spinal cordC. Efferent pathwayD. Effectors |
| Answer» Correct Answer - B | |
| 356. |
What is the correct path of a reflex arc ?A. Sensory stimulus `to` Dendrite `to` AxonB. Motor nerves `to` Acetylcholine `to` Adjustor neuronC. Efferent nerves `to` Connector nerves `to` Motor nervesD. Afferent nerves `to` Efferent nerves `to` Connector nerves |
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Answer» Correct Answer - A The correct pathway of reflex arc is : Sensory stimulus `to` Dentrite of sensory neuron `to` Axon of sensory neuron `to` CNS `to` Dendrite of motor neuron `to` Axon of motor neuron `to` Effector organ. |
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| 357. |
Which one of the following statements is not correct ?A. Rhodospin is the purplish red protein present in rods onlyB. Retina is the light absorbing portion of visual photo pigmentsC. In retina the rods have the photo pigment rhodopsin while cones have three different photopigments.D. Retina is a derivative of vitamin C |
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Answer» Correct Answer - D Retina is a derivative of vit. A. |
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| 358. |
During the propagation of a nerve impulse, the action potential results from the movement ofA. `Na^(+)` from intracellular fluid to extracellular fluidB. `Na^(+)` from extracellular fluid to intracellular fluidC. `Na^(+)` towards both directionsD. None of the above |
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Answer» Correct Answer - B During the conduction of nerve impulse, the action potential is the result of movement of `Na^(+)` from extracellular fluid to intracellular fluid. |
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| 359. |
Human eye is adjusted for distant objects more than 6 m away. For seeing the near objects which of the following would not occur ?A. Contraction in circular ciliary muscleB. Slackening of suspensory ligamentsC. Radius of curvature of lens decreasesD. Decrease in curvature of the lens |
| Answer» Correct Answer - D | |
| 360. |
The nerves leading to the central nervous system are calledA. EfferentB. AfferentC. MotorD. None |
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Answer» Correct Answer - B Nerve that connect only receptor orgnas to the CNS are purely sensory or afferent nerve because these contain only sensory nerve fibres. |
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| 361. |
Metacoel is the cavity in theA. Cerebral hemispheresB. DiencephalonC. CerebellumD. Medulla oblongata |
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Answer» Correct Answer - D Ventricles I and II of cerebral hemispheres are called as paracoels or lateral ventriciles. Ventricle III is known as diocoel Ventricle IV is the metacoel. |
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| 362. |
In a man, abducens nerve is injured. Which one of the following functions will be affected ?A. Movement fo eye ballB. Movement of tongueC. SwallowingD. Movement of neck |
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Answer» Correct Answer - A If abducens nerve is injured, movement of eye ball will be affected. |
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| 363. |
Which cell stops dividing after birth or Largest cell in body isA. NeuronB. GlialC. EpitheliumD. Liver |
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Answer» Correct Answer - a Largest cell in the body in neuron. Certain neurons may almost equal the length of body itself. |
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| 364. |
In a man, abducens nerve is injured. Which one of the following functions will be affected ?A. Movement of the eyeballB. Movement of the tongueC. SwallowingD. Movement of the neck |
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Answer» Correct Answer - A Abducens nerve is a motor nerve that controls the movement of the eyeball.Thus, if abducens nerve is injured, movement of the eyeball will be affected. |
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| 365. |
A cranial nerve that affects eye movement is theA. optic nerveB. trigeminal nerveC. trochlear nerveD. hypoglossal nerve |
| Answer» Correct Answer - C | |
| 366. |
Match the columns and find out the correct combination. `{:(,"Column I",,"Column II"),((a),"Cervical nerves",(i),"5 pairs"),((b),"Thoracic nerves",(ii),"1 pair"),((c),"Lumbar nerves",(iii),"12 pairs"),((d),"Coccygeal nerves",(iv),"8 pairs"):}`A. a-ii, b-iv, c-`i`, d-iiiB. a-iv, b-iii, c-`i`, d-iiC. a-`i`, b-iv, c-ii, d-iiiD. a-iv, b-`i`, c-ii, d-iii |
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Answer» Correct Answer - B In man, spinal nerves are divided into 5 groups- crevical (8pairs), thoratic (12 pairs), lumbar (5 pairs), Sacral (5 pairs) Coccygeal (1 pair). `C_(8)Th_(12)L_(5)S_(5)Co_(1)` : Man `C_(8)Th_(12)L_(7)S_(4)Co_(6)` : Rabbit Number of spinal nerves in frog in 10 pairs, in man 31 pairs and in rabbit 37 pairs. |
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| 367. |
The cranial nerve responsible for focusing the eye isA. OpticB. TrochlearC. OculomotorD. Trigeminal |
| Answer» Correct Answer - C | |
| 368. |
The fourth, fifth and ninth cranial nerves in mammals are respectivelyA. Oculomotor, facial and vagusB. Trigeminal, facial and spinal accessoryC. Trochlear , facial and glossopharyngealD. Pathetic, trigeminal and glossopharyngeal |
| Answer» Correct Answer - D | |
| 369. |
Which of the following are pure motor nerves ?A. Trochlear and vagusB. Abducens and auditoryC. Trochlear and abducensD. Trochlear and trigeminal |
| Answer» Correct Answer - C | |
| 370. |
Cornea is a transparent part ofA. RetinaB. ChoroidC. ScleroticD. Conjunctiva |
| Answer» Correct Answer - C | |
| 371. |
Fifth cranial nerve of frog is calledA. Opic nerveB. Vagus nerveC. Trigeminal nerveD. Opthalmic nerve |
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Answer» Correct Answer - c Trigeminal nerve is the fifth cranial nerve of frog. It arise from the antero-lateral sides of medulla oblongata. |
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| 372. |
Cornea is covered externally by a thin transparent membrane which is calledA. scleroticB. conjunctivaC. choroidD. None of these |
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Answer» Correct Answer - B Cornea is covered externally by a thin transparent membrane called conjunctiva.This membrane helps to protect the eye ball and keeps it moist. |
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| 373. |
Select the correct combination of statements for the neurotransmittersA. Acetylcholine is inactivated mainly by presynaptic reutakeB. Tyrosine is essential for the formation of dopamineC. Adrenaline is formed by methylation of the noradrenalineD. Serotonin is sythesized from phenylalanine |
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Answer» Correct Answer - A::B::D Tryosine amino acid is required for synthesis fo dopamine. Adrenline is formed by methylation of noradrenaline using Phenylethanolamine N- methyltrasnferase. |
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| 374. |
Protein found in eye lens isA. CrystallinB. CollagenC. OpsinD. Rhodopsin |
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Answer» Correct Answer - a The eye lens is made of transparent proteins called crystallins. The protein are arranged in approximately 20,000 thin concentric layers. The average concentration of lens protein is about twice than that of other intracellular proteins `&` is thought to play a structural role in the lens. |
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| 375. |
Stimulation of a muscle fibre by a motar neuron occurs atA. The myofibrilB. The sacroplasmic reticulumC. The neuromuscular junctionD. The transverse tubules |
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Answer» Correct Answer - C Neuromuscular junction is the junction between motor neuron and muscle fibre. |
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| 376. |
The function of iris in the eyes of frog is toA. Refraction of light raysB. Alter the size of the pupilC. Move the nictitating membraneD. Move the lens forward and backward |
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Answer» Correct Answer - b The muscles associated with the iris regulate the amount light entering the eyeball by varying the size of the pupli. |
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| 377. |
Which cranial nerve carries in excitation from the ear or The cranial nerve which brings impluses from the internal ear isA. OpticB. AuditoryC. OlfactoryD. Trigeminal |
| Answer» Correct Answer - b | |
| 378. |
Which is a characteristic of a graded potentialA. The amplitude os always the sameB. The duration variesC. Always followed by a refractory periodD. Is an all none response |
| Answer» Correct Answer - c | |
| 379. |
Which of the following is the function of ear ossicles ?A. To collect the vibrations in the airB. To equalise the pressures on either sides of the ear drumC. To secrete ear waxD. To increase the efficiency of transmission of sound waves to the inner ear |
| Answer» Correct Answer - D | |
| 380. |
The potential difference between outside and inside of a nerve before excitation is known asA. Resting potentialB. Action potentialC. Spike potentialD. Reaction potential |
| Answer» Correct Answer - A | |
| 381. |
The colour in vision results fromA. Absorption of different wavelengths of light by different classes of rods.B. Ability of each cone to absorb all wavelengths of light equally.C. Lens of eye acting like a prism and separating the different wavelengths of light.D. Three different isomers of opsins in different classes of cone cells. |
| Answer» Correct Answer - D | |
| 382. |
What happens to the sound waves when they reach the round window through scala tympani ?A. They die awayB. They increase in intensityC. They are transmitted to the oval windowD. They remain unaffected |
| Answer» Correct Answer - A | |
| 383. |
Scala tympani is connected to scala vestivuli by means ofA. StapesB. HelicotremaC. Basilar membraneD. Tectorial membrane |
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Answer» Correct Answer - B Scala tympani is connected to scala vestibuli by means of helicotrema. |
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| 384. |
A mammalian brain is characterised by the presence ofA. Optic lobesB. Corpus callosumC. CerebellumD. Cerebrum |
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Answer» Correct Answer - B A mammalian brain is characterised by the presence of corpus callosum. |
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| 385. |
Correct sequence of regions in organisation of auditory mechanoreceptor organ isA. Pinna-Tympanic membrane-Auditory canal-Cochlea-Malleus-Incus-Stapes-Auditory nerveB. Pinna-Malleus-Incus-Stapes-Auditory canal-Tympanic membrane-Cochlea-Auditory nerveC. Pinna-Auditory canal-Tympanic membrane-Malleus-Incus-Stapes-Cochlea-Auditory nerveD. Pinna-Cochlea-Tympanic membrane-Auditory membrane-Auditory canal-Incus-Malleus-Stapes-Cochlea-Auditory nerve |
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Answer» Correct Answer - C Correct sequence of regions in organisation of auditory mechanoreceptor organ is Pinna-Auditory canal-Tympanic membrane-Malleus-Incus-Stapes-Cochlea-Auditory nerve. |
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| 386. |
Phonoreceptors occur inA. SkinB. Middle earC. TympanumD. Internal ear |
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Answer» Correct Answer - D Phonoreceptors occur in internal ear. |
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| 387. |
Match column I with column II and select the correct option from the codes given below. `{:("Column I","Column II"),(A."Cerebrum",(i)"Controls the pituitary"),(B."Cerebellum",(ii)"Controls vision and hearing"),(C."Hypothalamus",(iii)"Controls the rate of heart beat"),(D."Midbrain",(iv)"Seat of intelligence "),(,(v)"Maintains body posture"):}`A. a-t, b-s, c-q, d-pB. a-s, b-t, c-q, d-pC. a-t, b-s, c-p, d-qD. a-s, b-t, c-p, d-q |
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Answer» Correct Answer - D `{:(,(a),"Cerebrum",,(s),"Seat of intelligence"),(,(b),"Cerebellum",,(t),"Maintains body posture"),(,(c),"Hypothalamus",,(p),"Controls pituitary"),(,(d),"Mid brain",,(q),"Controls vision and hearing"):}` |
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| 388. |
Which of the following is a richly vascular layer with lots of blood capillariesA. Duramater of brainB. Piamater of spinal cordC. Epidermis of skinD. Epithelia lining of trachea |
| Answer» Correct Answer - b | |
| 389. |
That part of the brain which is involved in interpreting an input, storing input information and initiating a response in the light of similar past experience isA. Motor areaB. Sensory areaC. Association areaD. Pons |
| Answer» Correct Answer - C | |
| 390. |
Movement of tongue muscle is controlled byA. facial nerveB. trigeminal nerveC. hypoglossal nerveD. vagus nerve |
| Answer» Correct Answer - C | |
| 391. |
In front of the lens, the aperture surrounded by the iris is called theA. PupilB. CorneaC. RetinaD. Rods |
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Answer» Correct Answer - A In front of the lens, the aperture surrounded by the iris is called the Pupil. |
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| 392. |
The diameter of the pupil is regulated by theA. Muscle fibres of ciliary bodyB. Muscle fibres of irisC. Muscle fibres of lensD. Ligaments of ciliary body |
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Answer» Correct Answer - B The diameter of the pupil is regulated by the muscle fibres of iris. |
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| 393. |
Cerebral hemisphere is the centre ofA. ThinkingB. Will powerC. ReasoningD. All of these |
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Answer» Correct Answer - D Cerebrum (cerebral hemisphere) is centre of thinking, will power, reasoning and memory, experience and learning knowledge and articulate speech. |
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| 394. |
Tongue is under control ofA. Facial nerveB. Glossopharyngeal nerveC. Trigeminal nerveD. Autonomous nervous system |
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Answer» Correct Answer - B Tongue taste is under control of glossopharyngeal nerve. |
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| 395. |
Identify the wrong statement about frogA. Parathyroid and pineal body are presentB. There are ten cranial nerves onlyC. Optic lobes are situated in the mid brainD. The ventricle opens into the conus arteriosus |
| Answer» Correct Answer - B | |
| 396. |
Which is a wrong relationA. Conditioned reflex-HodgkinsB. Blood circulation-W. HarveyC. DNA double helix model-Watson and CrickD. None |
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Answer» Correct Answer - A Conditional reflexes were first demonstrated by the Russian scientiest. Pavlov in dogs. |
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| 397. |
The nervous strip connecting both the cerebral hemispheres in the rabbit isA. Corpus callosumB. Corpus albicansC. Corpus strtumD. Corpus spongiosum |
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Answer» Correct Answer - a It coordinates the activity of both the cerebral hemispheres. |
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| 398. |
Match the column I and II, and choose the correct combination from the options given. `{:(,"Column I",,"Column II"),(a.,"Rods",1.,"Scotopic vision"),(b.,"Cones",2.,"Photopic vision"),(,,3.,"Twilight vision"),(,,4.,"Daylight vision"),(,,5.,"Colour vision"):}`A. a-1, 4, 5, b-2, 3B. a-2, 4, 5, b-1, 3C. a-1, 3, b-2, 4, 5D. a-1, 3, 5, b-2, 4 |
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Answer» Correct Answer - C The daylight (photopic) vision and colour vision are fuctions of cones and the twilight (scotopic) vision is the function of the rods. |
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| 399. |
In cataractA. Due to ageing or some infection eye lens becomes opaqueB. Elasticity of eye lens is lostC. There is irregular curvature of lensD. Eye ball becomes shorter |
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Answer» Correct Answer - A Cataract defect develops when lens becomes opaque and looses it flexibility, its density increases and it acquires amber colour. |
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| 400. |
Which of the following meninges is in contact with the brain tissue ?A. DuramaterB. ArachnoidC. PiamaterD. No meninx is in contact with the brain tissue |
| Answer» Correct Answer - C | |