CBSE Class 11 Biology Neural Control and Coordination MCQs Set 02

Question: The junction between the axon of one neuron and the dendrite of the next is called
a) constant bridge
b) junction point
c) a joint
d) a synapse.
Answer: d

Question: Which of the following is regarded as a unit of nervous tissue?
a) Neurons
b) Myelin sheath
c) Axons
d) Dendrites
Answer: a

Question: Vagus nerve is
a) X
b) IX
c) VII
d) V.
Answer: a

Question: During the propagation of a nerve impulse, the action potential results from the movement of
a) K+ ions from intracellular fluid to extracellular fluid
b) Na+ ions from extracellular fluid to intracellular fluid
c) K+ ions from extracellular fluid to intracellular fluid
d) Na+ ions from intracellular fluid to extracellular fluid.
Answer: b

Question: One function of parasympathetic nervous system is
a) contraction of hair muscles
b) stimulation of sweat glands
c) acceleration of heart beat
d) constriction of pupil.
Answer: d

Question: The sympathetic nerves, in mammals, arise from
a) sacral nerves
b) 3rd, 7th, 9th and 10th cranial nerves
c) thoraco-lumbar nerves
d) cervical nerves.
Answer: c

Question: Nissl’s bodies are mainly composed of
a) proteins and lipids
b) DNA and RNA
c) nucleic acids and SER
d) free ribosomes and RER.
Answer: d

Question: Myelin sheath is produced by
a) astrocytes and Schwann cells
b) oligodendrocytes and osteoclasts
c) osteoclasts and astrocytes
d) Schwann cells and oligodendrocytes.
Answer: d

Question: Afferent nerve fibres carry impulses from
a) effector organs to CNS
b) receptors to CNS
c) CNS to receptors
d) CNS to muscles.
Answer: b

Question: The most abundant intracellular cation is
a) H+
b) K+
c) Na+
d) Ca++.
Answer: b

Question: The Nissl’s granules of nerves cell are made up of
a) DNA
b) RNA
c) ribosome
d) protein
Answer: c

Question: Which part of the brain is responsible for thermoregulation?
a) Medulla oblongata
b) Cerebrum
c) Hypothalamus
d) Corpus callosum
Answer: c

Question: Alzheimer’s disease in humans is associated with the deficiency of
a) glutamic acid
b) acetylcholine
c) gamma aminobutyric acid (GABA)
d) dopamine.
Answer: b

Question: The transparent lens in the human eye is held in its place by
a) ligaments attached to the ciliary body
b) ligaments attached to the iris
c) smooth muscles attached to the iris
d) smooth muscles attached to the ciliary body.
Answer: a

Question: Receptor sites for neurotransmitters are present on
a) pre-synaptic membrane
b) tips of axons
c) post-synaptic membrane
d) membranes of synaptic vesicles.
Answer: c

Question: The human hind brain comprises three parts, one of which is
a) spinal cord
b) corpus callosum
c) cerebellum
d) hypothalamus.
Answer: c

Question: When a neuron is in resting state i.e., not conducting any impulse, the axonal membrane is
a) comparatively more permeable to Na+ ions and nearly impermeable to K+ ions
b) equally permeable to both Na+ and K+ ions
c) impermeable to both Na+ and K+ ions
d) comparatively more permeable to K+ ions and nearly impermeable to Na+ ions.
Answer: d

Question: Parkinson’s disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of eurotransmitter
a) acetylcholine
b) norepinephrine
c) dopamine
d) GABA.
Answer: c

Question: What used to be described as Nissl’s granules in a nerve cell are now identified as
a) cell metabolites
b) fat granules
c) ribosomes
d) mitochondria.
Answer: c

Question: Which of the following statement is correct for node of Ranvier of nerve?
a) Neurilemma is discontinuous.
b) Myelin sheath is discontinuous.
c) Both neurilemma and myelin sheath are discontinuous.
d) Covered by myelin sheath.
Answer: b

Question: Which cranial nerve has the highest number of branches?
a) Vagus nerve
b) Trigeminal nerve
c) Facial nerve
d) None of the options
Answer: b

Question: Sympathetic nervous system induces
a) secretion of digestive juices
b) heart beat
c) secretion of saliva
d) all of the options.
Answer: b

Question: Depolarization of axolemma during nerve conduction takes place because of
a) equal amount of Na+ and K+ move out across axolemma
b) Na+ move inside and K+ move more outside
c) more Na+ outside
d) None of the options.
Answer: b

Question: Which of the following statements is the characteristics of human cornea?
a) It is secreted by conjuctiva and glandular layer.
b) It is a lacrimal gland which secrete tears.
c) Blood circulation is absent in cornea.
d) In old age it becomes the cause of cataract.
Answer: c

Question: Which of the following regions of the brain is incorrectly paired with its function?
a) Corpus callosum – communication between the left and right cerebral cortices
b) Cerebrum – calculation and contemplation
c) Medulla oblongata – homeostatic control
d) Cerebellum – language comprehension
Answer: d

Question: Which of the following cranial nerves can regulate heart beat?
a) X
b) IX
c) VIII
d) VII
Answer: a

Question: Which part of human brain is concerned with the regulation of body temperature?
a) Cerebellum
b) Cerebrum
c) Hypothalamus
d) Medulla oblongata
Answer: c

Question: Third ventricle of brain is also known as
a) metacoel
b) rhinocoel
c) paracoel
d) diacoel.
Answer: d

Question: When we migrate from dark to light, we fail to see for sometime but after a time visibility becomes normal. It is example of
a) accomodation
b) adaptation
c) mutation
d) photoperiodism.
Answer: b

Question: Sensitive pigmented layer of eye is
a) cornea
b) retina
c) sclerotic
d) iris.
Answer: b

Question: During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?
a) First positive, then negative and continue to be negative
b) First negative, then positive and continue to be positive
c) First positive, then negative and again back to positive
d) First negative, then positive and again back to negative.
Answer: d

Question: Destruction of the anterior horn cells of the spinal cord would result in loss of
a) commissural impulses
b) integrating impulses
c) sensory impulses
d) voluntary motor impulses.
Answer: d

Question: Choose the correct statement.
a) Nociceptors respond to changes in pressure.
b) Meissner’s corpuscles are thermoreceptors.
c) Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the light stimulus.
d) Receptors do not produce graded potentials.
Answer: c

Question: Which one of the following is the example of the action of the autonomous nervous system?
a) Swallowing of food
b) Pupillary reflex
c) Peristalsis of the intestine
d) Knee-jerk response
Answer: c

Question: During the propagation of a nerve impulse, the action potential results from the movement of
a) K+ ions from intracellular fluid to extracellular fluid
b) Na+ ions from extracellular fluid to intracellular fluid
c) K+ ions from extracellular fluid to intracellular fluid
d) Na+ ions from intracellular fluid to extracellular fluid.
Answer: b

Question: The nerve centres which control the body temperature and the urge for eating are contained in
a) hypothalamus
b) pons
c) cerebellum
d) thalamus.
Answer: a

Question: Injury to vagus nerve in humans is not likely to affect
a) tongue movements
b) gastrointestinal movements
c) pancreatic secretion
d) cardiac movements.
Answer: a

Question: By which nervous system and of what type, the blood is supplied into visceral organs?
a) Both SNS and PNS, involuntary
b) Para-sympathetic nervous system involuntary
c) Sympathetic nervous system, involuntary
d) Sympathetic nervous system, voluntary
Answer: a

Question: Ivan Pavlov performed experiments on
a) simple reflexes
b) conditioned reflexes
c) cardiac reflexes
d) origin of life.
Answer: b

Question: Injury localized to the hypothalamus would most likely disrupt
a) short – term memory
b) co-ordination during locomotion
c) executive functions, such as decision making
d) regulation of body temperature.
Answer: d

Question: In mammalian eye, the ‘fovea’ is the center of the visual field, where
a) only rods are present
b) more rods than cones are found
c) high density of cones occur, but has no rods
d) the optic nerve leaves the eye.
Answer: c

Question: In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive
a) K+ into the cell
b) K+ and Na+ out of the cell
c) Na+ into the cell
d) Na+ out of the cell.
Answer: c

Question: Which of the following receptors are specifically responsible for maintenance of balance of body and posture?
a) Basilar membrane and otoliths
b) Hair cells and organ of corti
c) Tectorial membrane and macula
d) Crista ampullaris and macula
Answer: d

Question: Bowman’s glands are located in the
a) anterior pituitary
b) female reproductive system of cockroach
c) olfactory epithelium of our nose
d) proximal end of uriniferous tubules.
Answer: c

Question: Bowman’s glands are found in
a) juxtamedullary nephrons
b) olfactory epithelium
c) external auditory canal
d) cortical nephrons only.
Answer: b

Question: Which one of the following does not act as a neurotransmitter?
a) Cortisone
b) Acetylcholine
c) Epinephrine
d) Norepinephrine
Answer: a

Question: A gymnast is able to balance his body upside down even in the total darkness because of
a) tectorial membrane
b) organ of corti
c) cochlea
d) vestibular apparatus.
Answer: d

Question: Which part of the human ear plays no role in hearing as such but is otherwise very much required?
a) Eustachian tube
b) Organ of corti
c) Vestibular apparatus
d) Ear ossicles
Answer: c

Question: The vagus nerve is the cranial nerve numbering
a) 7
b) 5
c) 10
d) 9.
Answer: c

Question: Photosensitive compound in human eye is made up of
a) opsin and retinol
b) transducin and retinene
c) guanosine and retinol
d) opsin and retinal.
Answer: d

Question: In a man, abducens nerve is injured. Which one of the following functions will be affected?
a) Movement of the eyeball
b) Movement of the tongue
c) Swallowing
d) Movement of the neck
Answer: a