Animal Physiology MCQs Part 10

1) The lateral ventricle and diocoel of brain (third ventricle) are connected
by the

a) Occipital foramen
b) Foramen of Monro
c) Foramen magnum
d) Aqueduct of Sylvius

2) The earthworm and cockroach have which of the following things in common:
a) ventral nerve cord
b) closed blood vascular system
c) nephridia
d) cocoon

3) The true nervous system appears first of all in
a) Taenia
b) Ascaris
c) Hydra
d) Hirudinaria

4) The transmission of nerve impulses from one neuron to another is facilitated

a) Kinetin
b) Cholesterol
c) Adrenaline
d) Acetylcholine

5) Acetylcholine is a hormone secreted by a nerve which aids in
a) diastole of the heart
b) blood clotting
c) systole of the heart
d) none of the above

6) Acetylcholine is a
a) enzyme
b) chemical transmitter
c) toxin
d) vitamin

7) Each spinal nerve in a mammal arises from the spinal cord by two roots,
a dorsal and a ventral. Of these the ventral root is composed of

a) somatic motor and visceral motor fibres
b) somatic sensory and visceral motor fibres
c) somatic sensory and visceral sensory fibres
d) somatic motor and visceral sensory fibres

8) Which brain structure in rabbits is directly related to vision?
a) corpus callosum
b) corpus albicans
c) corpus quadrigemina
d) none of these

9) Which of the following cranial nerves of man is both sensory and motor?
a) optic
b) auditory
c) Olfactory
d) Trigeminal

10) The central nervous system contains mostly
a) motor neurons and association neurons
b) motor neurons and sensory neurons
c) association neurons and sensory neurons
d) association neurons only

11) Which of the following is regarded as a unit of nervous tissue?
a) axon
b) dendrite
c) myelin sheath
d) neuron

12) Which of the following can have non-myelinated nerve fibres?
a) spinal nerves
b) cranial nerves
c) autonomic nerves
d) optic nerves

13) The set of mixed nerves is
a) optic , auditory ,olfactory
b) auditory, trigeminal , hypoglossal
c) oculomotor, pathetic, abducens
d) vagus, facial, trigeminal

14) The nervous tissue develops from embryonic
a) ectoderm
b) mesoderm
c) endoderm
d) mesenchyme

15) The aqueduct of Sylvius connects the diacoel to the
c) auricle
d) lung

16) There is a temperature controlling mechanism in the body of a
a) fish
b) pea plant
c) frog
d) rabbit

17) Which of the following contains neurocytons?
a) Grey matter
b) White matter
c) Synapse
d) Trigeminal

18) The nerve centre for temperature regulation of the body occurs in the
a) hypothalamus
b) thalamus
c) somaesthetic
d) frontal lobe

19) Transmission of the impulse is controlled through the synapse by
a) Acetylcholine
b) Adrenaline
c) Cyclic AMP
d) None of these

20) The second cranial nerve of the frog is the
a) trochlear
b) optic
c) auditory
d) vagus

21) Which of the following is a purely motor nerve?
a) Olfactory- I
b) Trigeminal -V
c) Abducens- VI
d) Vagus -X

22) Conditioned reflex is related to
a) Pavlov
b) Sanger
c) Heckel
d) Darwin

23) If degeneration of nerve cells occurs which will be affected first?
a) dendrites
b) motor endplates
c) Nissl granules
d) Schwann cells

24) The site from which the nerve impulse for hearing originates in man
is the

a) ear ossicles
b) cochlea
c) auditory nerve
d) vestibule

25) Neurons at the synapse show
a) no continuity
b) partial continuity
c) complete continuity
d) chemical continuity

26) Ganglia are a
a) group of cytons
b) group of axons
c) cytons
d) only axons

27) Ringer’s solution contains
a) iodine and salt
b) acidic acid and wax
d) Water and fuchsin

28) The reflex action in vertebrate is an essential display, which is induced
by a

a) sensory nerve
b) motor nerve
c) sympathetic nerve
d) autonomic response

29) The eighth cranial nerve leads from the brain to the
a) ear
b) eye
c) nose
d) tongue

30) A neurotransmitter is responsible for the transmission of nerve impulses through
a) synapses
b) axon
c) dendrites
d) cytons

31) Which of the following is secreted at the end of a nerve fibre?
a) ascorbic acid
b) acetic acid
c) acetyl CoA
d) Acetylcholine

32) Acetylcholine is secreted by
a) the adrenal cortex
b) the liver
c) the adrenal medulla
d) synaptic bulbs

33) The centre of such major reflexes as vomiting and vasodilation is the
a) cerebrum
b) medulla oblongata
c) spinal cord
d) cerebellum

34) The vital centres contained in the medulla are known as
a) cardiac
b) respiratory
c) vasoconstrictor
d) all of these

35) The trigeminal is
a) motor in nature
b) sensory
c) mixed
d) none above

36) The oculomotor nerve is the … cranial nerve

37) Vagus nerve is …. in nature
a) sensory
b) mixed
c) motor
d) none

38) The transmission of a nerve impulse at a synapse is a
a) biological process
b) physical process
c) chemical process
d) mechanical process

39) In mammals the corpus callosum connects the
a) cerebral hemispheres
b) bone to a muscle
c) bone to a ligament
d) optic lobes

40) Through which aperture does the spinal cord pass out of the skull?
a) foramen ovale
b) foramen magnum
c) foramen of Monro
d) foramen of Panizza

41) Suspensory ligaments are found in the
a) brain
b) eye
c) ear
d) kidney

42) Which part of the human eye adjusts the focal length of the lens?
a) Cornea
b) Aqueous humour
c) Conjunctiva
d) Ciliary body

43) The black pigment in the eye, which reduces the internal reflection,
is located in the

a) choroid
b) iris
c) sclera
d) cornea

44) Proprioreceptors are
a) internal sense organs
b) organs of taste
c) organs of smell
d) organs of pain

45) The visual unit of the compound eye of an insect is the
a) ommatidium
b) rods
c) rhabdome
d) cones

46) Which one of the following pigments is not found in cones?
a) Erythrolabe
b) Chlorolabe
c) Cyanolabe
d) Melanophore

47) The function of antennae in a cockroach is to act as
a) tactile and sensory receptors
b) gustatory receptors
c) auditory receptors
d) olfactory receptors

48) Too short an eyeball and too flat a lens produces
a) near sightedness
b) presbyopia
c) astigmatism
d) none of the above

49) The organ of Corti is found in the
a) internal ear
b) external ear
c) both
d) none of the above

50) The lens of the eye and the retina are developed from
a) ectoderm
b) mesoderm
c) endoderm
d) ecto-mesoderm

51) The ora serrata are
a) a part of the third wall of the retina of the eye
b) part of the oral cavity of protochordates
c) glands present in the oral cavity of frogs
d) present in the utriculus of the ear

52) The chorda tympani supplies
a) muscles of the lower jaw, neck and pinna
b) muscles of the malleus
c) the tongue, salivary glands and snout
d) tongue and snout

53) In the chemistry of vision in mammals the photosensitive substance is

a) sclerotin
b) retinol
c) rhodopsin
d) melanin

54) Receptors of pressure present in the deep layers of skin are
c) Pacinian corpuscles
d) Corpuscles of Ruffini

55) The retina is most sensitive at the
a) optic disc
b) periphery
c) macula lutea
d) fovea centralis

56) Bats can travel with its
a) eyes open
b) eyes plugged and ears open
c) ears plugged and eyes open
d) ears closed and eyes plugged

57) An otolith is formed of
a) calcium carbonate
b) calcium oxalate
c) magnesium carbonate
d) magnesium sulphate

58) The retina of a vertebrate’s eye consists of
a) rods and cones
b) rods , cones, neurons and neuroglia
c) rods, cones and neurons
d) neurons and neuroglia

59) Chemoreceptors are the organs of
a) Smell
b) Hearing
c) Smell and taste
d) Touch

60) The balancing organ of the middle ear is the
a) semicircular canal and sacculus
b) semicircular canal and utriculus
c) legena and sacculus
d) otolith and legena

organ is an organ of

a) smell for reptiles and amphibians
b) vision for amphibians
c) sight for reptiles
d) smell for fishes

62) Bats have a special sensory system called
a) echo-balancing system
b) echo-location system
c) echo-flying system
d) echo-nervous system

63) The defective condition of accomodation of the eye in which distant
objects are clearly seen but near objects are indistinct is

a) astigmatism
b) shortsightedness
c) myopia
d) hypermetropia

64) The lateral line system is present in
a) fishes
b) frogs
c) reptiles
d) man

65) Which type of sensation occurs on eating pepper and chillies?
a) sour
b) Bitter
c) Pain
d) Salty

66) The function of iris, in the eyes of a frog, is to
a) move the nictitating membrane
b) alter the size of the pupil
c) move the lens forward and backward
d) refraction of light rays

67) Sensory receptors in the walls of the right atrium are stimulated

a) these regions are distended with blood and wall is stretched
b) blood temperature changes
c) A rise in the carbon dioxide content of the blood occurs
d) there is a change in the oxygen content of the blood

68) Rhodopsin is found in
a) cones and rods
b) nerves
c) rods
d) uterus

69) In frog, the tympanic membrane is stretched over a cartilaginous
ring, called the

a) fenestra ovalis
b) columella
c) annulus tympanicus
d) periotic

70) The lens and retina of vertebrate eye are developed from
a) ectoderm only
b) endoderm only
c) partially from ectoderm and partly from endoderm
d) mesoderm only

71) The power of accommodation in the human eye is controlled by the
a) cornea
b) pupil
c) iris
d) ciliary body

72) The fovea centralis of the human retina is characterized by
a) accumulation of rods only
b) accumulation of cones only
c) accumulation of rods and cones
d) accumulation of photoreceptor cells

73) The main hearing part is the
a) cochlea
b) canals
c) utriculus
d) eustachian tube

74) Which of the following is not involved in the maintenance of equilibrium?
a) sacculus and utriculus
b) semicircular canals
c) cochlea
d) endolymph

75) The shape of the lens in the eye of vertebrates is altered by the
a) iris
b) vitreous humour
c) ciliary muscles
d) none

76) The sense organs of frogs are produced from
a) ectoderm
b) mesoderm
c) endoderm
d) none

77) The tango receptors located next to ligaments and tendons are
c) Pacinian corpuscles
d) All above

78) The vitreous cavity is
a) behind the lens
b) in front of the lens
c) between the choroid and retina
d) between the choroid and sclera

79) Myopic vision can be corrected by wearing
a) convex glasses
b) concave glasses
c) plain glasses
d) cylindrical glasses

80) The sequence of eye coverings from outer to inner is
a) sclerotic, choroid and retina
b) choroid, retina and scletoric
c) retina, choroid and sclerotic
d) conjunctiva, choroid and sclerotic

81) Short sightedness or myopic vision is corrected by wearing a
a) concave lens
b) convex lens
c) biconvex lens
d) biconcave lens

82) Arachnoid mater is present in
a) Frogs
b) Man
c) Both A and B
d) None

83) The corpus callosum of the brain connects the
a) Two optic lobes
b) Two cerebral hemispheres
c) Two olfactory lobes
d) Optic chiasma

84) In which part of the mammalian brain are the corpora quadrigemina present?
a) Forebrain
b) Midbrain
c) Hindbrain
d) Spinal cord

85) Memory weakens if one of the following parts is injured
a) Medulla
b) Cerebellum
c) Cerebrum
d) Hypothalamus

86) Learning is related to the
a) Hypothalamus
b) Cerebrum
c) Cerebellum
d) Medulla

87) The integrative system other than the nervous system is the
a) Respiratory system
b) Endocrine system
c) Excretory system
d) Digestive system

88) Which of the following is found in the brainstem?
a) Respiratory centres
b) Salivary centre
c) Vasomotor centres
d) All of these

89) The fourth, fifth and ninth cranial nerves in mammals are respectively
a) Trochlear, trigeminal and glossopharyngeal
b) Trigeminal, facial and spinal accessory
c) Oculomotor, facial and vagus
d) Abducens, facial and glossopharyngeal

90) Which nerve is exclusively motor in function?
a) Trigeminal
b) Facial
c) Vagus
d) Spinal accessory

91) Which is a mixed nerve?
a) Olfactory
b) Auditory
c) Facial
d) Oculomotor

92) The sympathetic fibres of the autonomic nervous system
a) stimulate the function of a visceral organ by secreting epinephrine
b) inhibit the function of a visceral organ by secreting epinephrine
c) stimulate the function of a visceral organ by secreting acetycholine
d) inhibit the function of a visceral organ by secreting acetycholine

93) If the heart is stimulated through its vagus supply,the heart rate will
a) decrease
b) increase
c) show no change
d) none

94) The parasympathetic nervous system increases the activity of the
a) gut, iris, urinary bladder
b) heart, adrenal, sweat glands
c) heart, lacrimal glands, pancreas
d) lacrimal glands, sweat glands, arrector pili

95) Sympathetic nerve fibres in mammals arise from the
a) Thoracolumbar nerves
b) III, IV, X, cranial nerves
c) Sacral nerves
d) Cervical nerves

96) Damage to the sympathetic trunk of one side of the body results in

97) The movement of a substance against the electrochemical gradient is known as
a) Diffusion
b) Osmosis
c) Active transport
d) Absorption

98) Pacinian corpuscles present in skin detect
a) Pain
b) Pressure contact
c) Movement
d) Temperature

99) Pecten, a comb-like structure is found in the eye of
a) Fishes
b) Frogs
c) Birds
d) Mammals

100) The space between the cornea and lens is the
a) Aqueous chamber
b) Vitreous chamber
c) Canal of Schlemm
d) Fovea centralis


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