Nervous Coordination in Animals
Multiple Choice Questions and Answers
1. The membrane that gives us the ability to discriminate different pitches of sound is the
(a) round window
(b) tympanic membrane
(c) tectorial membrane
(d) basilar membrane
Answer: (d) basilar membrane
2. The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the
(a) fovea
(b) iris
(c) blind spot
(d) optic chaisma
Answer: (c) blind spot
3. The loss of positive ions from the interior of a neuron produces:
(a) depolarization
(b) threshold
(c) hyperpolarization
(d) action potential
Answer: (c) hyperpolarization
4. Which of the following describes the largest amount of human cerebral cortex?
(a) the primary somatosensory cortex
(b) the temporal cortex
(c) association cortex
(d) the occipital cortex
Answer: (c) association cortex
5. Over one foot long cells of the body are
(a) gland cells
(b) muscle cells
(c) bone cells
(d) nerve cells/neurons
Answer: (d) nerve cells/neurons
6. Mammalian brain is characterized from the brain of other animals through:
(a) cerebellum
(b) cerebrum
(c) corpus callosum
(d) optic lobes
Answer: (c) corpus callosum
7. Human brain has greater development of
(a) optic lobes
(b) cerebellum
(c) cerebrum
(d) medulla oblongata
Answer: (c) cerebrum
8. Outermost covering of brain is
(a) piamater
(b) dura mater
(c) white matter
(d) arachnoid
Answer: (b) dura mater
9. Third ventricle occurs in
(a) heart
(b) brain
(c) bones
(d) skull
Answer: (b) brain
10. Tree like branched structure found in cerebellum is
(a) arbor vitae
(b) arcole
(c) archentenoid
(d) arboreal
Answer: (a) arbor vitae
11. Brain is produced by
(a) Mesoderm
(b) Ectoderm
(c) Endoderm
(d) Both mesoderm and ectoderm
Answer: (b) Ectoderm
12.The thermoregulatory centre in the body is
(a) spinal cord
(b) hypothalamus
(c) cerebellum
(d) pituitary
Answer: (b) hypothalamus
13. Coordination of voluntary muscle activity is connected with
(a) cerebrum
(b) cerebellum
(c) medulla oblongata
(d) crura cerebri
Answer: (a) cerebrum
14. A ganglion of sensory neurons occurs in
(a) dorsal horn of spinal cord
(b) ventral root of spinal nerve
(c) dorsal root of spinal nerve
(d) dermis of skin
Answer: (c) dorsal root of spinal nerve
15. Ivan Pavlov performed experiments on
(a) simple reflexes
(b) conditioned reflexes
(c) cardiac reflexes
(d) origin of life
Answer: (b) conditioned reflexes
16. State of complete inexcitability between polarization and repolarization is
(a) refractory period
(b) synaptic delay
(c) action potential
(d) depolarization
Answer: (d) depolarization
17. Auditory area is present in the
(a) occipital lobe
(b) parietal lobe
(c) frontal lobe
(d) temporal lobe
Answer: (d) temporal lobe
18. The site from where the nerve impulse for hearing originates
(a) ear ossicles
(b) cochlea
(c) auditory nerve
(d) ear drum
Answer: (b) cochlea
19. Endolymph is found in
(a) internal ear
(b) posterior chamber of the eye
(c) synovial cavity
(d) cnidoblast cells
Answer: (a) internal ear
20. Canal joining internal ear with buccal cavity is
(a) semicircular canal
(b) tympanic cavity
(c) eustachian tube
(d) aqueduct of sylvius
Answer: (c) eustachian tube
21. Aperture controlling passage of light in the eye is
(a) blind spot
(b) pupil
(c) iris
(d) cornea
Answer: (b) pupil
22. In eye colour is detected by
(a) rods
(b) choroid
(c) rods and cones
(d) cones
Answer: (d) cones
23. Retina contains maximum number of cones in the region of
(a) edges
(b) fovea centralis
(c) blind spot
(d) sides
Answer: (b) fovea centralis
24. Retina is composed of
(a) cones only
(b) rods only
(c) rods and cones only
(d) cones, rods and neuro ganglion cells
Answer: (d) cones, rods and neuro ganglion cells
25. Glands similar to sebaceous ones are present on the eyelids are
(a) lacrimal
(b) ceruminous
(c) meibomian
(d) pituitary
Answer: (c) meibomian
26. Organ of Corti occur in
(a) external ear
(b) middle ear
(c) cochlea
(d) retina
Answer: (c) cochlea
27. Cornea is continuous with
(a) retina
(b) choroid
(c) sclera
(d) iris
Answer: (c) sclera
28. Which statement about olfaction is not true?
(a) Dogs are unusual among mammals, in that they depend more on olfaction than on vision, as their dominant sensory modality.
(b) Olfactory stimuli are recognised by the interaction between the stimulus and a specific macromolecule on olfactory hairs.
(c) The greater the number of action potentials generated by an olfactory receptor, the greater the intensity of the perceived smell.
(d) The perception of different smells results from the activation of different combinations of olfactory receptors
Answer: (d) The perception of different smells results from the activation of different combinations of olfactory receptors
29. The colour in vision results from the
(a) different absorption of wavelengths of light by different classes of rods
(b) ability of each cone to absorb all wavelengths of light equally
(c) lens of the eye acting like a prism and separating the different wavelengths by light
(d) three different isomers of opsin in different classes of cone cells.
Answer: (d) three different isomers of opsin in different classes of cone cells.
30. During accommodation for near vision:
(a) images from the distant objects are focussed behind the retina
(b) the focusing power of the lens is increased
(c) the sympathetic nerves to the eye are activated
(d) the pupil does not constrict
Answer: (b) the focusing power of the lens is increased
31 The all-or-none principle states that:
(a) the properties of an action potential are independent of the strength of the depolarising stimulus
(b) all stimuli will produce action potentials
(c) all graded potentials will generate action potential
(d) any cell membrane can generate and propagate an action potential is stimulated to threshold
Answer: (d) any cell membrane can generate and propagate an action potential is stimulated to threshold
32. Which statement about the autonomic nervous system is true?
(a) The sympathetic division is afferent and the parasympathetic division is efferent.
(b) Each pathway in the automatic autonomic nervous system includes the neurons and the neurotransmitter of the first neuron is acetylcholine.
(c) The cell bodies of many sympathetic postganglionic neurons are in the brain stem.
(d) The cell bodies of most parasympathetic postganglionic neurons are in or near the thoracic and lumbar spinal cord.
Answer: (b) Each pathway in the automatic autonomic nervous system includes the neurons and the neurotransmitter of the first neuron is acetylcholine.
33. Which statement is not true?
(a) In the spinal cord, the white matter contains the axons conducting information up and down the spinal cord.
(b) The limbic system is involved in basic physiological drives, instincts and emotions.
(c) The vast majority of the nerve cell bodies in the human nervous system are contained within the limbic system.
(d) In human, a part of the limbic system is necessary for the transfer of short-term memory to long-term memory.
Answer: (c) The vast majority of the nerve cell bodies in the human nervous system are contained within the limbic system.
34. Human brain has greater development of
(a) optic lobes
(b) cerebellum
(c) cerebrum
(d) medulla oblongata
Answer: (c) cerebrum
35. Outermost covering of brain is
(a) piamater
(b) dura mater
(c) white matter
(d) arachnoid
Answer: (b) dura mater
36. Which is the innermost membrane in meningitis?
(a) Pia mater
(b) Arachnoid
(c) Dura mater
(d) None of these
Answer: (a) Pia mater
37. During development of action potential in a nerve fibre, positive and negative charges on outer and inner side of axon membrane are reversed due to
(a) excretion of all potassium ions more
(b) more potassium ions enter than sodium ions leave the axon
(c) more sodium ions enter the axon than potassium ions leave the same
(d) all sodium ions enter the axon
Answer: (c) more sodium ions enter the axon than potassium ions leave the same
38. Structure connected with vision in rabbit is
(a) Corpus callosum
(b) Corpora quadrigemina
(c) Corpus albicans
(d) Hippocampus
Answer: (b) Corpora quadrigemina
39.Energy transformation in nervous system is
(a) chemical to radiant
(b) chemical to mechanical
(c) chemical to electrical
(d) chemical to osmotic
Answer: (c) chemical to electrical
40. Which of the following is mismatched?
(a) cerebrum-memory
(b) cerebellum-equilibrium of body
(c) olfactory lobe-smell
(d) medulla oblongata-temperature regulation
Answer: (d) medulla oblongata-temperature regulation
41. Name the cranial nerves of human being viz., II,VII,VIII,IX
(a) optic, auditory, facial, hypoglossal
(b) oculomotor, auditory, abducens, hypoglossal
(c) optic, facial, auditory, glossopharyngeal
(d) optic facial abducens, glossopharyngeal
Answer: (c) optic, facial, auditory, glossopharyngeal
42. Sense of smell is by
(a) cerebrum
(b) cerebellum
(c) olfactory lobe
(d) hypothalamus
Answer: (c) olfactory lobe
43. Which cranial nerve gives out many number of branches?
(a) Vagus
(b) Trigeminal
(c) Optic
(d) Facial
Answer: (a) Vagus
44. Nerves conduct impulses by
(a) chemical signals
(b) electric signals
(c) physical signals
(d) thermal signals
Answer: (b) electric signals
45. Excessive stimulation of vagus nerve in humans may lead to
(a) hoarse voice
(b) peptic ulcers
(c) efficient digestion of proteins
(d) irregular contractions of diaphragm
Answer: (b) peptic ulcers
46. Motor nerve is
(a) olfactory
(b) optic
(c) oculomotor
(d) vagus
Answer: (c) oculomotor
47. Sequence of meninges from inner to outside is
(a) dura mater arachnoid pia mater
(b) dura mater pia mater arachnoid
(c) arachnoid dura mater pia mater
(d) pia mater arachnoid dura mater
Answer: (d) pia mater arachnoid dura mater
48. Pons connects
(a) brain with spinal cord
(b) cerebrum with cerebellum
(c) two lobes of cerebellum
(d) two cerebral hemispheres
Answer: (c) two lobes of cerebellum
49. Retina of eye is analogous to which part of camera?
(a) film
(b) lens
(c) shutter
(d) glass
Answer: (a) film
50.Which layer forms white of an eye?
(a) Sclera
(b) Retina
(c) Choroid
(d) Iris
Answer: (a) Sclera
51. Which reflexes are transmitted through heredity?
(a) Conditioned reflexes
(b) Unconditioned reflexes
(c) Both (a) and (b)
(d) None of these
Answer: (b) Unconditioned reflexes
52. The depression in the retina of one eye which lodges only the cones is called
(a) blind spot
(b) fovea centralis
(c) fenestra rotunda
(d) red nuclei
Answer: (b) fovea centralis