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1001.

Axolemma is selectively permeable forA. complex proteinsB. simple organic moleculesC. inorganic moleculesD. both (b) and (c )

Answer» Correct Answer - D
1002.

In a resting nerve fibre the concentration of `K^(+)` ions isA. more in the ECF than axoplasmB. more in axoplasm than ECFC. equal in ECF and axoplasmD. None of the above

Answer» Correct Answer - B
1003.

Which of the following component is not common in all types of spinal reflexes ?A. ReceptorB. EffectorC. InterneuronD. Sensory neuron

Answer» Correct Answer - C
1004.

A boy learns typewriting and harmonium at the same time. He finds harmonium more easy to learn. This isA. Conditioned reflexB. Short term homeostasisC. Long term homeostasisD. Residual learning

Answer» Correct Answer - a
Reflexes developed by training and learning are called condtioned or acquired reflexes for examplea after proper learning, we can perform dancing. Cycling. Swimming, singing, playing etc. simply by reflexes.
1005.

Schwann cells are present whereA. nerve is covered with myelia sheathB. neurilemma is myelin sheath are discontinuousC. myelin sheath in discontinuousD. neurilemma is discontinuous

Answer» Correct Answer - A
The vestibular apparatus contributes to our balance and sense of special orientation. It is the sensory system that provides the dominant input about movement and equillibrium maintenance.
1006.

Assertion : The neural organisation is very simple in lower invertebrates. Reason : The vertebrates have a more developed neural system.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false.

Answer» Correct Answer - B
The neural organisation is very simple in lower invertebrates.
The vertebrates have a more developed neural system.
1007.

The third ventricle of the brain is situated in theA. Base of telencephalonB. Roof of metencephalonC. Roof of diencephalonD. Base of myelencephalon

Answer» Correct Answer - C
1008.

In the given figure, site A and site B represents A. Site A-polarised state, site B -depolarised stateB. Site A - depolarised state, site B - polarised stateC. Site A - polarised state, site B - repolarised stateD. Site A - repolarised state site, B - depolarised state

Answer» Correct Answer - B
1009.

Lower vertebrate in which neural organisation is very simple & composed of netwrk of neurons is

Answer» Correct Answer - Hydra
1010.

Fourth ventricle of brain occurs inA. Olfactory lobeB. Medulla oblongataC. Cerebral hemisphereD. Diencephalon

Answer» Correct Answer - B
1011.

Site whre all the information are processed & controlled is

Answer» Correct Answer - CNS
1012.

In the given figure, site A and site B represents A. Site A-polarised state, site B -depolarised stateB. Site A - depolarised state, site B - polarised stateC. Site A - polarised state, site B - repolarised stateD. Site A - repolarised state site, B - depolarised state

Answer» Correct Answer - B
1013.

The human neural system comprises ofA. PNS onlyB. CNS onlyC. Both (a) and (b)D. None of these

Answer» Correct Answer - C
1014.

Which of the following is known as the site of information processing and control?A. CNSB. PNSC. Both (a) and (b)D. Neurons

Answer» Correct Answer - A
1015.

Feeling of tremors of an earthquake, a scared resident of seventh floor of a multistoried building starts climbing down the stairs rapidly. Which hormone initiated this action ?A. AdrenalineB. GlucagonC. GastrinD. Thyroxin

Answer» Correct Answer - A
1016.

Animals which have well developed echolocation system like that of batsA. Wild catsB. BeaversC. PrimatesD. Whales and dolphins

Answer» Correct Answer - d
Bats produce subsonic sound which are received by ear after being reflected by the surrounding object . The time taken by the echo indicates the distance of object to bat.
1017.

which cranial nerves are purely sensory ?A. I, II and VIIIB. I, II and IVC. I, V and VIID. None of these

Answer» Correct Answer - A
1018.

Alzhimer disease in humans is associated with the deficiency ofA. dopamineB. glutamic acidC. acetylcholineD. Gamma Amino Butyric Acid (GABA)

Answer» Correct Answer - C
1019.

The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eye, is a derivative ofA. vitamin-CB. vitamin-DC. vitamin-AD. vitamin-B

Answer» Correct Answer - C
There are two types of photoreceptor cells of retina, namely rods and cones. The rods contain a purplish-red protein called the rhodopsin or visual purple, which contains a derivative of vitamin-A.
1020.

The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eye, is a derivative ofA. Vitamin-CB. Vitamin-DC. Vitamin-AD. Vitamin-B1

Answer» Correct Answer - C
There are two types of photoreceptor cells of retina, namely rods and cones. The rods contain a purplish red protein called the rhodopsin (visual purple), which is a derivative of vitamin-A.
1021.

The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eye, is a derivative ofA. Vitamin AB. Vitamin BC. Vitamin CD. Vitamin D

Answer» Correct Answer - A
Purplish red pigment rhodopsin contained in rod type of photoreceptor cells of the human eye, is a derivative of vitamin A called retinal.
1022.

Which one of the following does not act as a neurotransmitter ?A. AcetylcholineB. EpinephrineC. Nor epinephrineD. Cortisone

Answer» Correct Answer - D
1023.

Which one of the following does not act as a neurotransmitter ?A. AcetylcholineB. EpinephrineC. Cortisone/TyrosineD. Norepinephrine

Answer» Correct Answer - C
Acetylcholine, nor-epinephrine, epinephrine, histamine, serotonin, 5-Hydoxy Tryptamine (5-HT), dopamine and glutamine are excitory neurotransmitters.
GABA (Gamma amino butyric acid) and glycine are inhibitory neurotransmitters.
1024.

Which one of the following does not act as a neurotransmitter ?A. CortisoneB. AcetylcholineC. DopamineD. Norepinephrine

Answer» Correct Answer - A
The chemicals releasing from a pre-synaptic neuron and interacting with specific receptors on post-synaptic neuron are called neurotransmitters. Cortisone is not a neurotransmitter.
1025.

The tract of nerve fibres which connects the cerebral hemisphere isA. corpus luteumB. corpus callosumC. Corpora quadrigeminaD. cerebral aqueduct

Answer» Correct Answer - B
1026.

During the conduction of nerve impulse, the repolarisation occurs with theA. influx of `K^(+)` ionsB. influx of `Na^(+)` ionsC. efflux of `K^(+)` ionsD. efflux of `Mg^(2+)` ions

Answer» Correct Answer - C
When a stimulus is applied, sodium-potassium pump stops operating. Sodium ions rush inside and potassium ions rush outside. This results in depolarisation (action potential). After a period of action potential, sodium-potassium pump operates (efflux of `Na^(+)` and influxes of `(K^(+)`) and axon will get resting potential by repolarisation.
1027.

Saltatory conduction of impulse occurs inA. Myelinated nerve fibresB. Nonmyelinated fibresC. Both of theseD. None of these

Answer» Correct Answer - A
1028.

At the time of conduction of nerve impulse, the repolarization occurs with meA. Efflux of `K^(+)` ionsB. Influx of `K^(+)` ionsC. Efflux of `Na^(+)` ionsD. Efflux of both `Na^(+) and K^(+)` ions

Answer» Correct Answer - A
1029.

During repolarization of nerveA. `Na^(+)` channels are closed and `K^(+)` channel are openB. `K^(+)` gate closes and `Na^(+)` gate openC. Both `K^(+)` and `Na^(+)` gates are closedD. Both gates remain open

Answer» Correct Answer - A
1030.

In the presence of `Ca^(2+)` channel blockers, which of the following will be true ?A. Neurotransmitter is released but `Na^(+)` channel of post -synaptic neuron will not openB. Neurotransmitter is not released but `Na^(+)` channel of post - synaptic neuron will open upC. Neurotransmitter is released but `K^(+)` channel of post - synaptic neuron open upD. Neither neurotransmitter is released nor the `Na^(+)` channel of post - synaptic neuron open up

Answer» Correct Answer - D
1031.

These processes occurs during repolarization of nerve fibre (i) Open `Na^(+)`channel (ii) Closed `Na^(+)` channel (iii) Closed `K^(+)` channel (iv) Open `K^(+)` channelA. (ii) and (iv)B. (i) and (iii)C. (ii) and (iii)D. (i) and (ii)

Answer» Correct Answer - a
1032.

Resting membrane potential is maintained byA. HormonesB. NeurotransmitterC. Ion pumpsD. None of the above

Answer» Correct Answer - C
1033.

During resting state, the gate of `K^(+)` channel isA. openB. leakyC. closedD. interrupted by channels

Answer» Correct Answer - C
1034.

Which of the following is not a part of brain stem?A. Medulla oblongataB. PonsC. CerebellumD. Midbrain

Answer» Correct Answer - C
1035.

Instrument used to record EEG isA. electroencephalographB. cathode ray oscilloscopeC. Both (a) and (b)D. None of these

Answer» Correct Answer - C
1036.

Integration of the visual, tactile and auditory inputs occurs in the or Crure cerebrae is found inA. Peripheral nervous systemB. Corpus callosumC. Limbic systemD. Medulla oblongata

Answer» Correct Answer - D
Crura cerebrae are thickened wentral portions of the mid-brain of a verebrate consisting of nervous tracts linking the thalamencephalon with the hind-brain.
1037.

The receptors which are sensitive to blood pressure change maintain homeostasis through vasodilation or vasoconstriction areA. phonocreceptorsB. statoreceptorsC. baroreceptorsD. thermoreceptors

Answer» Correct Answer - C
1038.

Hypothalamus of the brain is not in involved in this functionA. Osmoregulation and thirstB. Temperature controlC. Accuracy of muscular movementD. Sleep wake cycle

Answer» Correct Answer - C
1039.

Specific receptors responsible for the balance of the bodyA. Organ of CortiB. Crista and maculaC. Basilar membraneD. Tectorial membrane

Answer» Correct Answer - B
Specified receptors responsible for the balance of the body and posture are crista and macula.
1040.

Which of the following statements is incorrect ?A. Humans focus the eye by changing the shape of the lensB. Human eye adjusts the amount of light entering the eye by contracting the ciliary muscles.C. Human eye focuses by moving the lens closer to or farther from the retinaD. Colour blindness is due to an inherited lack of one or more types of cones

Answer» Correct Answer - C
1041.

One of the following is a part of diencephalon.A. EpithalamusB. Olfactory bulbC. Basal gangliaD. Lateral ventricles

Answer» Correct Answer - A
1042.

Diencephalon is the centre of the following exceptA. SweatingB. SneezingC. ThirstD. Hunger

Answer» Correct Answer - B
1043.

Diencephalon is related toA. ponsB. corpora quadrigeminaC. Basal gangliaD. hypothalamus

Answer» Correct Answer - D
1044.

Diencephalon is not a control centre ofA. Heart beatB. AngerC. HateD. Love

Answer» Correct Answer - a
1045.

The butterfly-like structure surrounding the centre of a human spinal cord is calledA. funiculusB. hornC. white matterD. grey matter

Answer» Correct Answer - D
1046.

Common feature amongst acetylcholine, noradrenaline and serotonin isA. all are anticoagulantsB. they lower blood pressureC. they raise heartbeatD. all are neurotransmitters

Answer» Correct Answer - B
1047.

In the serial wise arrangement of cranial nerves, after which nerves we got trochlear nerve ?A. OpticB. OlfactoryC. OculomotorD. Trigeminal

Answer» Correct Answer - C
1048.

Trochlear nerve suppliesA. Superior rectusB. Inferior obliqueC. Superior obliqueD. Nasal epithelium

Answer» Correct Answer - C