Neural Control and Coordination Class 11 Biology Important Questions
Please refer to Neural Control and Coordination Class 11 Biology Important Questions with answers below. These solved questions for Chapter 21 Neural Control and Coordination in NCERT Book for Class 11 Biology have been prepared based on the latest syllabus and examination guidelines issued by CBSE, NCERT, and KVS. Students should learn these solved problems properly as these will help them to get better marks in your class tests and examinations. You will also be able to understand how to write answers properly. Revise these questions and answers regularly. We have provided Notes for Class 11 Biology for all chapters in your textbooks.
Important Questions Class 11 Biology Chapter 21 Neural Control and Coordination
Question. A polarised neuron is said to be in _____
(a) Action potential
(b) Resting potential
(c) Spike potential
(d) None of these
Question. What generally maintains the electrical charge across the neuronal membrane
(a) Na+ K+ pump
(b) Action potential
(c) Resting potential
(d) Voltage channels
Question. Which of the following statements is correct?
(a) The electrical potential difference across the polarised plasma membrane is called as the resting potential
(b) The impulse is action potential
(c) Na+ ions are responsible for generating an action potential
Question. A segment of neuronal membrane showing action potential is said to be
(d) None of the above
Question. The electrical potential difference across the depolarised membrane is called
(a) Action potential
(b) Resting potential
(c) Water potential
(d) Solute potential
Question. Nerve impulse is generated when the nerve cell undergoes _____
Question. Unidirectional transmission of the nerve impulse is maintained by-
(b) Myelin sheath
(d) Membrane polarity
Question. _____ is the central information processing organ of our body, and acts as the command and control system
(a) Endocrine system
Question. Human brain is well protected by
(b) Cranial meninges
(c) Spinal cord
(d) both (a) and (b)
Question. The brain is divided into how many major parts
Question. For seeing the nearby objects, the lens becomes more convex by
(a) relaxation of iris muscles.
(b) contraction of iris muscles.
(c) contraction of ciliary muscles.
(d) relaxation of ciliary muscles.
Question. In human eye, the blind spot contains
(c) both rods and cones
(d) neither rods nor cones
Question. Eye ball is moved in the orbit by
(a) four rectus and two oblique muscles
(b) ciliary muscles
(c) suspensory ligaments
(d) two rectus and four oblique muscles
Question. Which part of the human eye adjust the focal length of lens ?
(a) Aqueous humour
(b) Ciliary body
Question. The cochlea of ear contains
(b) aqueous humour
(c) perilymph and endolymph
(d) only endolymph
Question. The stereocilia of hair cells of organ of Corti are covered with a thick elastic membrane called
(a) Reissner’s membrane
(b) basilar membrane
(c) tympanic membrane
(d) tectorial membrane
Question. Bony labyrinth of ear contains a fluid known as
(c) aqueous humour
(d) synovial fluid
Question. Receptor cells for balance in human ear are located in
(a) utricle, saccule and semicircular canal
(b) malleus, incus and stapes
(c) organ of corti
(d) Eustachian tube
Question. In which part of the mammalian ear, the nerve impulse for hearing starts?
(b) Ear ossicles
(d) Auditory nerve
Question. In mammalian cochlea, the thin-walled sloping roof of the scala media is referred to as
(a) organ of Corti
(b) scala tympani
(c) basilar membrane
(d) reissner’s membrance
Assertion/Reason Type Questions
In the following questions, a statement of Assertion is followed by a statement of Reason.
(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 the 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.
Question. Assertion : The chemical stored in the synaptic vesicles are termed as neurotransmitter.
Reason : Synaptic vesicles release these chemicals in synaptic cleft.
Question. Assertion : Astigmatism is due to uneven curvature of lens.
Reason : It is treated with cylindrical lenses.
Question. Assertion : The brain stem contains centres for controlling activities.
Reason : Brain stem is very sensitive.
Matching Type Questions
Question. Select the answer with correct matching of the structure, its location and function.
|(a) Eustachian tube||Anterior part of internal ear||Equalizes air pressure on either sides of|
|Mid brain||Controls respiration and gastric secretions|
|(c) Hypothalamus||Fore brain||Controls body temperature, urge for|
eating and drinking
|(d) Blind spot||Near the place where optic nerve leaves the eye||Rods and cones are present but inactive here|
Question. Column I lists the parts of the human brain and column II lists the functions. Match the two columns and identify the correct option.
|A. Cerebrum||I. Controls the pituitary|
|B. Cerebellum||II. Controls vision and hearing|
|C. Hypothalamus||III. Controls the rate of heart beat|
|D. Medulla oblongata||IV. Maintains body posture|
(a) A – II, B – IV, C – I, D – III
(b) A – IV, B – V, C – III, D – I
(c) A – V, B – IV, C – III, D – II
(d) A – V, B – V, C – I, D – II
Question. Which one of the following is the correct difference between rod cells and cone cells of retina.
|Rod Cells||Cone Cells|
|(a) Distribution||More concentrated in centre of retina||Evenly distributed all over retina|
|(b) Visual acuity||High||Low|
|(c) Visual pigment contained||Iodopsin||Rhodopsin|
|(d) Over all function||Vision in poor light||Colour vision and detailed vision in bright light|
Question. Match the given terms in column I with its definition given in column II and choose the correct options.
|Column I |
|A. Semi-circular canal||I. Spiral organ of Corti|
|B. Vestibule||II. Fluid found in the scala vestibule and scala tympani|
|C. Cochlea||III. Evaluates rotational motion|
|D. Perilymph||IV. Fluid found within the organ of Corti|
|E. Endolymph||V. Responds to gravity and movements of the head|
(a) A – III, B – V, C – I, D – II, E – IV
(b) A – I, B – II, C – III, D – IV, E – V
(c) A – II, B – III, C – IV, D – V, E – I
(d) A – IV, B – I, C – V, D – II, E – III
Question. Select the correct match of the types of neuron present in column I with its location given in column II.
|Column I||Column II|
|A. Sclera||I. The visible coloured portion of the eye.|
|B. Choroid||II. Its diameter is regulated by the muscle fibres of iris.|
|C. Pupil||III. Composed of a dense connective tissue|
|D. Fovea||IV. Portion of the retina where only the cones are densely packed|
|E. Iris||V. Contains many blood vessels and looks bluish in colour|
(a) A – I; B – II; C – III; D – IV; E – V
(b) A – III; B – V; C – II; D – IV; E – I
(c) A – IV; B – I; C – V; D – II; E – IV
(d) A – V; B – IV; C – III; D – I; E – II
Question. Identify the correct match of types of neurons with its location.
(i) Unipolar neuron – Embryonic stage
(ii) Bipolar neuron – Cornea of eyes
(iii) Multipolar neuron – Cerebral cortex
(a) (i) & (ii) only
(b) (ii) & (iii) only
(c) (i) & (iii) only
(d) All the three.
Critical Thinking Type Questions
Question. Layers in wall of eye balls from inside outwards are
(a) retina, choroid, sclerotic
(b) sclerotic, choroid, retina
(c) choroid, retina, sclerotic
(d) choroid, sclerotic, retina
Question. Which part of internal ear recognizes the different frequencies of sound ?
(a) Tectorial membrane
(b) Basilar membrane
(c) Tympanic membrane
(d) Reissner’s membrane
Question. Trace the correct sequence for pathway of light through the eye to the retina?
(a) Conjunctiva – Cornea – Aqueous humour – Pupil – Lens – Vitreous humour – Yellow spot.
(b) Cornea- Conjunctiva- Vitreous humour- Lens- Pupil – Aqueous humour – Yellow spot
(c) Conjunctiva- Cornea – Vitreous humour – Lens – Pupil – Aqueous humour – Yellow spot
(d) Cornea – Conjunctiva – Aqueous humour – Pupil- Lens- Vitreous humour – Yellow spot
Question. ‘X’ is an important part of ‘Y’ which lies at the base of the structure which is a major coordinating centre for sensory and motor signalling. It contains a number of centre which control body temperature, urge for eating and drinking.
Identify X and Y from the options given below
(a) X -Cerebellum ; Y – Hindbrain
(b) X -Hypothalamus ; Y – Forebrain
(c) X -Corpora quadrigemina ; Y – Midbrain
(d) X -Pituitary gland ; Y – Forebrain
Question. Unmyelinated nerve fibre is enclosed by an ‘X’ that does not form a myelin sheath around the ‘Y’, and is commonly found in ‘Z’ and the somatic neural systems. Identify ‘X’, ‘Y’ and ‘Z’.
X Y C
(a) Schwann cells Axon Autonomous
(b) Nodes of Ranvier Cell body Synaptic knob
(c) Synapse Dendrites Sympathetic
(d) Meninges Nerve impulse Peripheral