NEET Biology Neural Control and Coordination MCQs Set 14

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Chapter-wise Objective Questions: Neural Control and Coordination

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Multiple Choice Questions

Question 1: Which of the following act as auditory receptors in the ear?
(a) Semicircular canals
(b) Cristae
(c) Hair cells of oragn of corti
(d) Saccule and utricle
Show Answer & Explanation

Answer: (c) Hair cells of oragn of corti

Explanation:
1. Hair cells are part of sensory structure i.e. organ of corti.

Question 2: The hair cells present on the crista ampullaris receive the stimuli of
(a) Audition
(b) Change in the body posture
(c) Vision
(d) Olfaction
Show Answer & Explanation

Answer: (b) Change in the body posture

Explanation:
1. The hair cells present on the cristae ampullaris receives stimuli of the change of body posture.

Question 3: Paralysis of jaw muscles is due to loss of function of which cranial nerve?
(a) III
(b) V
(c) VII
(d) X
Show Answer & Explanation

Answer: (b) V

Explanation:
1. The trigeminal nerve (Vth nerve) controls the movement of jaw muscles.
2. Loss of function of this nerve leads to paralysis of the former muscles.

Question 4: Which of the following cranial nerves in man is both sensory and motor?
(a) Optic
(b) Olfactory
(c) Trigeminal
(d) Auditory
Show Answer & Explanation

Answer: (c) Trigeminal

Explanation:
1. Cranial nerves (12 pairs) Sensory nerves Motor nerves Mixed nerves I, II, VIII III, IV, VI, XI, XII (both sensory and motor) V, VII, IX, X.

Question 5: Which of the following cranial nerves are linked with taste buds?
(a) VII & III
(b) IX & II
(c) IV & VIII
(d) VII & IX
Show Answer & Explanation

Answer: (d) VII & IX

Explanation:
1. Facial (VII) nerve and glossopharyngeal (IX) nerve are associated with the taste buds.

Question 6: Smallest cranial nerve of the body is
(a) Trigemminal
(b) Abducens
(c) Opthalmic
(d) Trochlear
Show Answer & Explanation

Answer: (d) Trochlear

Explanation:
1. Trochlear (IV) nerve is the smallest cranial nerve while vagus (X) nerve is the largest cranial nerve.

Question 7: Which of the following act is responsible for the depolarisation of the neuron?
(a) Opening of voltage gated K+ channel
(b) Opening of voltage gated Na+ channel
(c) Closure of voltage gated K+ channel
(d) Closure of voltage gated Na+ channel
Show Answer & Explanation

Answer: (b) Opening of voltage gated Na+ channel

Explanation:
1. The depolarisation of the neuron is due to the opening of Na+ channels due to which inner membrane of the neuron becomes less negative, henceforth change the membrane potential known as depolarisation.

Question 8: Suppose the terminal ends of axon are in contact with dendrites of four adjacent neurons, the nerve impulse of the axon will
(a) Travel in all the four neurons
(b) Get distributed in all the four neurons resulting in a weak impulse
(c) Travel only in one neuron which is in closest contact and with the same intensity
(d) Travel in none of the neurons because the impulse travels from dendrites of one neuron into the axon of another neuron
Show Answer & Explanation

Answer: (a) Travel in all the four neurons

Explanation:
1. Axon endings in the synapse release neurotransmitters which bind to the post-synaptic membrane, leading to the transfer of either excitatory on inhibiting signals.
2. So, when the neurotransmitter released by one presynaptic neuron, strikes on the post–synaptic membrane next to it, nerve impulse will be generated.

Question 9: Axon endings release from its synaptic vesicles, a neuro-transmitter substance known as
(a) Acetylcholine
(b) Acetylcholinesterases
(c) Inositol-3 phosphate
(d) Diacylglycerol
Show Answer & Explanation

Answer: (a) Acetylcholine

Explanation:
1. Acetylcholine is the neurotransmitter that is released from the synaptic vesicle.

Question 10: Which part of the brain is like a defense castle controlling moods and plays an important role in emotional behaviour, such as aggression and remembering fear?
(a) Hippocampus
(b) Amygdala
(c) Limbic system
(d) Thalamus
Show Answer & Explanation

Answer: (b) Amygdala

Explanation:
1. The emotional reaction such as aggression and fear is controlled by amygdala of the limbic system Limbic system Amygdala Hippocampus (Controls anger and rage).

Question 11: The link between paracoel and diocoel is through
(a) Foramina Luschka
(b) Foramina Magendie
(c) Foramen of Monro
(d) Aqueduct of Sylvius
Show Answer & Explanation

Answer: (c) Foramen of Monro

Explanation:
1. Link between paracoel (cerebral hemispheres) and diacoel (diencephalon) is known as Foramen of Monro or Interventicular foramen.

Question 12: Branched tree like structure present in cerebellum is
(a) Arborial
(b) Areole
(c) Arbor vitae
(d) Archenteron
Show Answer & Explanation

Answer: (c) Arbor vitae

Explanation:
1. Branched tree like, structures that is present in the cerebellum is known as Arbor vitae, which is formed by white and grey matter.

Question 13: The vomiting centre is situated in
(a) Cerebrum
(b) Cerebellum
(c) Medulla
(d) Hypothalamus
Show Answer & Explanation

Answer: (c) Medulla

Explanation:
1. Vomiting centre is located in the medulla oblongata.

Question 14: End of spinal cord is
(a) Cauda equina
(b) Conus terminalis
(c) Filum terminalis
(d) Funiculus
Show Answer & Explanation

Answer: (b) Conus terminalis

Explanation:
1. End of the spinal cord is the conus terminalis.
2. Filum terminale = Fibrous tissue derived from piamater.
3. Cauda equina = Number of parallel spinal nerves in hinder part of spinal cord.

Question 15: The activity of which cranial nerve can protect us by warning about harmful chemicals in the air?
(a) V
(b) IX
(c) VI
(d) X
Show Answer & Explanation

Answer: (a) V

Explanation:
1. V. Trigeminal nerve – Smell (associated with nose) IX. Glossopharyngeal – Taste and touch movements of Pharynx VI. Abducens – Rotation of eyeball X. Vagus nerve – Swallowing Thus, activity of trigeminal nerve protects us by warning about harmful chemicals in the air.

Question 16: Total number of taste buds in the human tongue is approximately
(a) 1000
(b) 10,000
(c) 1,00,000
(d) 50,000
Show Answer & Explanation

Answer: (b) 10,000

Explanation:
1. Total member of tastebuds in human tongue is approximately 10,000 (Eye).

Question 17: When the object is at a distance of more than 6 metres, at that time
(a) Ciliary muscles are fully contracted
(b) Convexity of lens is maximum
(c) Eyes are fully relaxed
(d) All of these
Show Answer & Explanation

Answer: (c) Eyes are fully relaxed

Explanation:
1. When object is at a distance of more than 6 metres i.e, have to see the distant object, ciliary muscles are relaxed and suspensory ligaments are contracted leading to decrease in the convexity of lens while the eyes are relaxing.

Question 18: Overproduction of aqueous humour results in
(a) Astigmatism
(b) Fovea centralis
(c) Macula lutea or yellow spot
(d) Glaucoma
Show Answer & Explanation

Answer: (d) Glaucoma

Explanation:
1. Glaucoma is caused by increased intraocular pressure (IOP) either due to increased secretion of aqueous humor or blockage of the drainage canal which causes damage to the optic nerve.

Question 19: Short sightedness or myopic vision is corrected by wearing
(a) Convex lenses
(b) Concave lenses
(c) Convex mirrors
(d) Concave mirrors
Show Answer & Explanation

Answer: (b) Concave lenses

Explanation:
1. Short sightedness or myopia in which the image is formed in front of the retina is corrected by wearing the diverging on concave lenses.

Question 20: Which of the following structures or regions is incorrectly paired with its functions?
(a) Medulla oblongata : controls respiration and cardiovascular reflexes.
(b) Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement.
(c) Corpus callosum : band of fibers connecting left and right cerebral hemispheres.
(d) Hypothalamus : production of releasing hormones and regulation of temperature, hunger and thirst.
Show Answer & Explanation

Answer: (b) Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement.

Explanation:
1. Limbic system is emotional brain.
2. It controls all emotions in our body but not movements.

Question 21: Receptor sites for neurotransmitters are present on
(a) Membranes of synaptic vesicles
(b) Pre-synaptic membrane
(c) Tips of axons
(d) Post-synaptic membrane
Show Answer & Explanation

Answer: (d) Post-synaptic membrane

Explanation:
1. Pre-synaptic membrane is involved in the release of neurotransmitter in the chemical synapse.
2. The receptors sites for neurotransmitters are present on post-synaptic membrane.

Question 22: Choose the correct statements.
(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 hyperpolarized in response to the light stimulus
(d) Receptors do not produce graded potentials
Show Answer & Explanation

Answer: (c) Photoreceptors in the human eye are depolarised during darkness and become hyperpolarized in response to the light stimulus

Explanation:
1. Photoreceptors (Rod cells) in human eye are depolarised during darkness and become hyperpolarised in response to the light stimulus.

Question 23: Photosensitive compound in human eye is made up of
(a) Transducin and Retinene
(b) Guanosine and Retinol
(c) Opsin and Retinal
(d) Opsin and Retinol
Show Answer & Explanation

Answer: (c) Opsin and Retinal

Explanation:
1. Rhodopsin is made up of Retinal and opsin.

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