CBSE Questions for Class 11 Medical Biology Neural Control And Coordination Quiz 10 - MCQExams.com

A central opening of iris is
  • Cornea
  • Lens
  • Pupil
  • Fovea centralis
Cerebrum is part of ________.
  • Mesencephalon
  • Metencephalon
  • Prosencephalon
  • Myelencephalon
Which prevents internal reflection of light in the eye?
  • Choroid
  • Cornea
  • Sclera
  • Conjuctive
  • Ciliary body
Forward stereoscopic visual field will be greatest in.
  • Cat
  • Rabbit
  • Deer
  • Horse
The anterior portion of sclera is called ________.
  • Lens
  • Iris
  • Pupil
  • Ciliary body
  • Cornea
Iodopsin occurs in
  • Iris
  • Rods
  • Cones
  • Lens
Light sensitive cells of eye are present in __________.
  • Cornea
  • Sclera
  • Choroid
  • Retina
The order of three layers of cells in retina of human eye from inside to outside is
  • Bipolar cells, photoreceptors, ganglion cells
  • Ganglion cells, rods, cones
  • Ganglion cells, bipolar cells, photoreceptor cells
  • Photoreceptor cells, ganglion cells, bipolar cells
  • Ganglion cells, photoreceptor cells, bipolar cells
Identify two small apertures present in auditory capsule.
  • Foramen magnum and formen ovale
  • Foramen ovale and fossa ovalis
  • Fenestra ovalis and obturator foramen
  • Fenestra ovalis and fenestra rotunda
Which one of the following statements is not correct?
  • In retina the rods have the photopigment rhodopsin while cones have three different photopigments
  • Retinal is a derivative of vitamin C
  • Rhodopsin is the purplish red protein in rods only
  • Retinal is light absorbing portion of visual photopigments
Which is not a refractive medium of eye?
  • Lens
  • Vitreous humour
  • Aqueous humour
  • Pupil
Match the columns.
III
$$1$$.FoveaaProvides opening for entry of light
$$2$$.IrisbTransduces RBG fight
$$3$$.PupilcTransmits information to CNS
$$4$$.LensdControls amount of light entering
$$5$$.Optic NerveeFocus light on retina
  • $$1-b, 2-d, 3-a, 4-e, 5-c$$
  • $$1-a, 2-b, 3-c, 4-d, 5-e$$
  • $$1-c, 2-a, 3-d, 4-e, 5-b$$
  • $$1-e, 2-a, 3-d, 4-c, 5-b$$
  • $$1-d, 2-a, 3-e, 4-b, 5-c$$
Retina has
  • Rods and cones only
  • Rods only
  • Cones only
  • Rods, cones and neuroganglion cells
Canal of Schlemm occurs in
  • Middle ear
  • Internal ear
  • Aqueous chamber of eye
  • Vitreous chamber of eye
Myelin sheath consists of
  • A layer of cells
  • Fat
  • Protein
  • Alternate fat and protein layers
Part of eye which acts as diaphragm of photography is
  • Pupil
  • Cornea
  • Iris
  • Lens
What is fovea centralis?
  • It is a region of retina with only rod cells
  • It is a region of retina without any sensory cells
  • It is a region of choroid with only cone cells
  • It is a region of retina with only cone cells
Ceruminous or wax producing glands are modified
  • Apocrine sweat glands
  • Merocrine sweat glands
  • Holocrine sebaceous glands
  • Apocrine sebaceous glands
Which part of lens in human eye is helpful in adjustment of focal length?
  • Cornea
  • Mucus
  • Ciliary body
  • Conjunctiva
A temporary blurring/dazzling occurs when one comes out of a cinema hall due to
  • Sudden activation of cone cells
  • Bleaching of rods
  • Overlapping of images by both rods and cones
  • Closure of pupil
Retina is composed of
  • Rod only
  • Cones only
  • Rods and cones
  • Rods, cones and neuroganglion cells.
Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics.
683530_ad76dd6c8c8f454ebb6ae455b545a0b4.png
  • A - Retina - contains photo receptors - rods and cones
  • B - Blind spot - has only a few rods and cones
  • C - Aqueous chamber - reflects the light which does not pass through the lens
  • All of the above.
The parts of the neuron that perform basic cellular functions such as protein synthesis ___________.
  • Axons
  • Soma
  • Synaptic knobs
  • Dendrites
Where is the image of an object formed in human eye?
  • Iris
  • Pupil
  • Retina
  • Cornea
Which one of the following pairs is incorrect?
702756_c1cd0ac15e96462d858401b371785ede.png
  • A- Dendrite
  • B- Nucleus
  • C- Cell body
  • D- Myelin sheath
Which one of the following is not a part of brain stem?
  • Cerebrum
  • Corpora quadrigemina
  • Medulla oblongata
  • Pons varolli
Which one of the following parts of a neuron is covered by fatty sheath?
  • Axon
  • Cyton
  • Dendrite
  • Node of Ranvier
Nissl's granules are absent in:
  • Dendrite
  • Cyton
  • Axon
  • Both A and B
Photosensitive compound in human eye is made up of
  • Opsin and Retinal
  • Opsin and Retinol
  • Transducin and Retinene
  • Guanosine and Retinol.
How many pairs of sympathetic ganglia are present in ANS?
  • 10
  • 12
  • 22
  • 31.
An investigator places an isolated neuron in a calcium-free medium, gives the neuron a suprathreshold stimulus and then performs an assay to test whether neurotransmitter is released into the medium. Which of the following outcomes would you predict?
  • No neurotransmitter is detected since influx of calcium into the synaptic knob is required for neurotransmitter release.
  • No neurotransmitter is detected since influx of calcium is required in order for the neuron to conduct an action potential.
  • Neurotransmitter is detected since calcium is not required for action potential conduction and the initial stimulus was suprathreshold.
  • We cannot predict the outcome without knowing whether the neuron was myelinated or non-myelinated.
The direction of light striking the retina will be ___________________.
  • Photosensory cells ->bipolar neurons->ganglionic cells->sensory nerves
  • Sensory nerves ->Bipolar neurons->ganglionic cells -> Photosensory cells
  • Sensory nerves ->ganglionic cells ->Bipolar neurons-> Photosensory cells
  • Photosensory cells->ganglionic cells ->Bipolar neurons->sensory nerves
Why neurilemma is absent in central nervous system?
  • Myelin sheath formation absent in CNS
  • In CNS the nerve sells are myelinated by oligodendrocytes
  • No exchange of ions in CNS
  • Always non-medullated nerve fibres are found in CNS.
In human brain two hemispheres are connected by bundle of fiber which is know as _______________.
  • Medulla oblongata
  • Cerebrum
  • Cerebellum
  • Corpus callosum
Which of the following statements are incorrect?
(i) When an impulse travels along a myelinated neuron, it leaps over the myelin sheath from one node to the next.
(ii) At chemical synapse there is continuity between the presynaptic and postsynaptic neurons provided by the gap junctions.
(iii) Neurotransmitters are chemicals that are released from postsynaptic neuron which interact with specific receptors of presynaptic neuron.
(iv) Neurons releasing acetylcholine are described as cholinergic neurons and those releasing noradrenaline are described as adrenergic neurons.
(v) Refractory period is the period after the transmission of an impulse in a nerve fibre in which membrane of the axon regains its ability to transit impulses.
  • (i), (ii) and (iv)
  • (ii) and (iv)
  • (ii) and (iii)
  • (i), (iii) and (v)
Your external ear (pinna) is supported by
  • Bone
  • Cartilage
  • Tendon
  • Capsule
Select the incorrect option regarding the given figure of a neuron with its parts labelled as P, Q, R, S and T.
810051_2971def715f443d69d6f7b918207cc6e.jpg
  • Part P of this neuron connects with part T of another neuron.
  • Part R is formed by wrapping of a special cell around S of the neuron.
  • Part Q is central vacuole that contains signal transmitting compounds.
  • Part P receives signals and part T carries signals out of the neuron.
Retina cells are sensitive to :
  • Smell
  • Light
  • Taste
  • Touch

Image of an object is formed on the
  • Pupil
  • Retina
  • Lens
  • Cornea

Sensory cells are found in which part of eye?
  • Cornea
  • Pupil
  • Retina
  • Choroid
The region in the eye where the rods and cones are located is the
  • Retina
  • Cornea
  • Choroid
  • Sclera
One of the examples of the action of the autonomous nervous systems
  • Pupillary reflex
  • Swallowing of food
  • Peristalsis of the intestines
  • Knee-jerk response
Which part of the eye is grafted in a needy patient from a donated eye?
  • Conjunctiva
  • Cornea
  • Choroid
  • Ciliary muscles
The insulating sheath covering the neural axon is called
  • plasmalemma
  • neurilemma
  • dura mater
  • pia mater
If parasympathetic nerve of the human is cut then heart beat -
  • Unaffected
  • Decreases
  • Increases
  • Stop
Integrative system in the body consists of
  • endocrine system
  • nervous system
  • blood vascular system
  • both (1) and (2)
Which of the following is not an effect produced by parasympathetic stimulation?
  • Dilation of the pupils
  • Increased saliva production
  • Increased stomach activity
  • Constriction of the bronchi
Cells of the nervous system that are specialized to provide support arid protection are known as
  • Schwann cells
  • Axons
  • Neurons
  • Neuroglia
Choose the correct answer from the alternatives given.
Grey matter is
  • located on the outside of the spinal cord
  • restricted to the brain
  • populated by cell bodies of neurons
  • found in the ventricles of the vertebrate brain
_________ is a decrease in the response to an ongoing stimulus.
  • perception
  • visual accommodation
  • sensory adaptation
  • both (b) and (c)
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