Neural control and coordination MCQs with Answers

Question-1. Rods and cones of eyes are modified

1. multipolar neuron
2. unipolar neuron
3. None of these
4. bipolar neuron

Question-2. The nerve transmitter, produced at the synapse and neuromuscular junction, is

1. GTP
2. ATP
3. phosphokinase
4. acetylcholine

Question-3. Alzheimer disease in humans is associated with the deficiency of

1. glutamic acid
2. dopamine
3. None of these
4. acetylcholine

Question-4. The junction between the axon of one neuron and the dendrite of the next is called

1. a synapse
2. a joint
3. constant bridge
4. junction point

Question-5. Which one of the following does not act as a neurotransmitter ?

1. Epinephrine
2. Acetylcholine
3. Norepinephrine
4. Cortisone

Question-6. Afferent nerve fibres carry impulses from

1. receptors to CNS
2. CNS to receptors
3. CNS to muscles
4. effector organs to CNS

Question-7. Among which one of the following groups of chemicals, all are neurotransmitters?

1. Noradrenaline, somatostatin, threonine
2. Somatostatin, serotonin, acetylcholine
3. Glycine, dopamine, melatonin
4. Acetylcholine, noradrenaline, dopamine

Question-8. Arbor vitae is composed of

1. Neuroglea cells
2. Grey matter
3. All of these
4. White matter

Question-9. Bowman’s glands are found in

1. external auditory canal
2. cortical nephrons only
3. juxtamedullary nephrons
4. olfactory epithelium

Question-10. Characteristic feature of human cornea is that

1. it is lacrimal gland which secretes tears
2. blood circulation is absent in cornea
3. in old age it become hard and white layer deposits on it which causes the cataract
4. it is secreted by conjunctiva and glandular tissue

Question-11. CNS is mostly made of

1. sensory neurons and association neurons
2. association neurons
3. motor neurons and association neurons
4. motor neurons and sensory neurons

Question-12. Cornea transplant in human is almost never rejected. This is because

1. it has no blood supply
2. it is composed of enucleated cells
3. it is a non-living layer
4. its cells are least penetrable by bacteria

Question-13. Cornea transplantation is outstandingly successful because

1. cornea is not linked up with blood vascular and immune systems
2. the technique involved is very simple
3. cornea is easily available
4. cornea is easy to preserve

Question-14. During stress condition which of the following nerves start working?

1. Parasympathetic nerves
2. Autonomic nerves
3. Cranial nerves
4. Sympathetic nerves

Question-15. Ecdysis is shedding of

1. epidermis
2. dermis
3. stratum Malpighi
4. stratum corneum

Question-16. Eustachian tube connects

1. Internal pharyax
2. External ear with internal ear
3. External ear with middle ear
4. Middle ear with pharynx

Question-17. Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells of the following. Which of the cells are least likely to be replaced by new cells ?

1. Malpighian layer of the skin
2. Liver cells
3. Neurons
4. Osteocytes

Question-18. Frequency of sound is discriminated by

1. All of these
2. The type of fluid - perilymph or endolymph
3. The intensity of movement of basilar fibres of cochlea
4. The site at the cochlear coi

Question-19. Function of iris is to

1. refract light rays
2. bring about movements of eye lids
3. alter the size of pupil
4. move lens forward and backward

Question-20. Hair present in the skin are

1. epidermal in origin and made of living cells
2. dermal in origin and made of living cells
3. dermal in origin and made of dead cells
4. epidermal in origin and made of dead cells

Question-21. In a man, abducens nerve is injured. Which one of the following functions will be affected?

1. Swallowing
2. Movement of the tongue
3. Movement of the neck
4. Movement of the eye ball

Question-22. In frog, “fenestra ovalis” is

1. the air-filled cavity of the middle ear
2. the communication between the pharynx and the tympanic cavity
3. the external opening of the tympanic cavity which is covered by the tympanic membrane
4. the opening in the auditory capsule which separates the middle ear from internal ear

Question-23. In humans, visceral organs are innervated by

1. parasympathetic nerves and are under conscious control
2. Both a) and b)
3. both sympathetic and parasympathetic nerves but are not under conscious control
4. sympathetic nerves and are under conscious control

Question-24. In the chemistry of vision in mammals, the photosensitive substance is called

1. retinal
2. rhodopsin
3. melanin
4. sclerotin

Question-25. Injury to vagus nerve in human is not likely to affect

1. gastrointestinal movements
2. pancreatic secretion
3. cardiac movements
4. tongue movements

Question-26. Iris is part of

1. choroid/uvula
2. choroid and retina
3. sclerotic and choroid
4. sclerotic

Question-27. Ivan Pavlov performed experiments on

1. conditioned reflexes
2. cardiac reflexes
3. origin of life
4. simple reflexes

Question-28. Light rays entering the eye are controlled by

1. iris
2. comea
3. lens
4. pupil

Question-29. Mark the incorrect statement

1. The pressure on ear drum is equalized by eustachian tube
2. Otolith organ consists of saccule and utricle
3. None of these
4. Opsin (of Rhodopsin) develops from vitamin A

Question-30. Nerve cells do not divide because they do not have

1. mitochondria
2. nucleus
3. Golgi body
4. centrosome

Question-31. One function of parasympathetic nervous system is

1. stimulation of sweat glands
2. acceleration of heart beat
3. constriction of pupil
4. contraction of hair muscles

Question-32. One of the examples of the action of the autonomous nervous system is

1. pupillary reflex
2. swallowing of food
3. peristalsis of the intestine
4. knee-jerk response

Question-33. 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 neurotransmitter

1. norepinephrine
2. dopamine
3. GABA
4. acetylcholine

Question-34. Respiratory centre is situated in

1. medulla oblongata
2. hypothalamus
3. cerebrum
4. cerebellum

Question-35. Retina is most sensitive at

1. periphery
2. macula lutea
3. fovea centralis
4. optic disc

Question-36. Saltatory conduction of nerve impulse takes place through

1. Non-myelinated fibre
2. Grey fibres
3. None of these
4. Myelinated fibre

Question-37. Sensitive pigmented layer of eye is

1. retina
2. sclerotic
3. iris
4. cornea

Question-38. Sympathetic nervous system induces

1. secretion of digestive juices
2. secretion of saliva
3. All of the above
4. heart beat

Question-39. The black pigment in the eye which reduces the internal reflection is located in

1. cornea
2. iris
3. sclerotic
4. retina

Question-40. The cochlea of ear contains

1. only endolymph
2. aqueous humour
3. perilymph
4. perilymph and endolymph

Question-41. The enzyme required for the conduction of nerve impulse across synapse is

1. succinic dehydrogenase
2. peroxidase
3. ascorbic acid oxidase
4. choline acetylase

Question-42. The gelatinous membrane covering the sensorys hair cells of the ear is known as

1. Reissner's membrane
2. basilar membrane
3. neuro-sensory membrane
4. tectorial membrane

Question-43. The layer of actively dividing cells of skin is termed as

1. stratum corneum
2. stratum Malpighi/stratum germinativum
3. stratum lucidum
4. stratum compactum

Question-44. The local depolarization of a receptor-cell membrane is called as

1. resting potential
2. threshold potential
3. None of these
4. action potential.

Question-45. The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eye, is a derivative of

1. Vitamin B1
2. Vitamin D
3. Vitamin C
4. Vitamin A

Question-46. The sympathetic nerves, in mammals arise from

1. cervical nerves
2. thoraco-lumbar nerves
3. III, VII, IX and X cranial nerves
4. sacral nerves

Question-47. The threshold of a neuron is

1. the amount of excitatory neurotransmitter required to elicit an action potential
2. The membrane voltage at which an axon potential will be suppressed
3. The amount of inhibitory neurotransmitter required to inhibit an action potential.
4. The membrane voltage at which the membrane potential develops into an action potential

Question-48. Third ventricle of brain is also known as

1. rhinocoel
2. paracoel
3. diacoel
4. metacoel

Question-49. Vagus nerve is

1. IX
2. VII
3. V
4. X

Question-50. What is the intensity of sound in normal conversation?

1. 35-60 dB
2. 70-90 dB
3. 120-150 dB
4. 10-20 dB

Question-51. When we migrate from dark to light, we fail to see for some time but after a time visibility becomes normal. It is an example of

1. adaptation
2. mutation
3. photoperiodism
4. accommodation

Question-52. Which cranial nerve has the highest number of branches?

1. Trigeminal
2. Vagus nerve
3. None of these
4. Facial nerve

Question-53. Which of the following cranial nerves can regulate heart beat?

1. IX
2. VIII
3. VII
4. X

Question-54. Which of the following is regarded as a unit of nervous tissue ?

1. Axons
2. Dendrites
3. Neurons
4. Myelin sheath

Question-55. Which one of the following is correctly matched pair of the given secretion and its primary role in human physiology ?

1. Sweat — Thermoregulation
2. Saliva — Tasting food
3. Tears — Excretion of salts
4. Sebum — Sexual attraction

Question-56. Which one of the following not act as a neurotransmitter ?

1. Epinephrine
2. Norepinephrine
3. Cortisone
4. Acetylcholine

Question-57. Which one of the following statements is correct ?

1. Endocrine glands regulate neural activity and nervous system regulates endocrine glands
2. Neither hormones control neural activity nor the neurons control endocrine activity
3. Endocrine glands regulate neural activity, but not vice versa
4. Neurons regulate endocrine activity, but not vice versa

Question-58. Which part of human brain is concerned with the regulation of body temperature?

1. Hypothalamus
2. Medulla Oblongata
3. Cerebellum
4. Cerebrum

Question-59. You are sitting in biology class daydreaming. Yourintrinsic heartbeat is controlled by

1. the medulla
2. the cerebrum
3. the spinal cord
4. levels of adrenaline in the blood.

Question-60. At a neuromuscular junction, synaptic vesicles discharge ______.

1. Epinephrine
2. Adrenaline
3. None of these
4. Acetylcholine

Question-61. During resting state, fluid outside axon contains

1. low concentration of Na+
2. low concentration of Cl–
3. high concentration of Cl–
4. low concentration of K+

Question-62. Find the odd one.

1. Nissl s granules
2. nephrons
3. synaptic knob
4. Schwann cells

Question-63. Functions of smooth muscles, cardiac muscles, organs, and glands are regulated by ______ system.

1. Sympathetic
2. Central nervous
3. Autonomic
4. Parasympathetic

Question-64. Select the correct statement from the ones given below

1. Barbiturates when given to criminals make them tell the truth
2. Morphine is often given to persons who have undergone surgery as a pain killer
3. Chewing tobacco lowers blood pressure and heart rate
4. Cocaine is given to patients after surgery as it stimulates recovery

Question-65. The basic cyclic pattern of inspiration and expiration are established by a respiratory center within the ______.

1. Medulla oblongata
2. Cerebral cortex
3. Thalamus
4. Cerebellum

Question-66. The cutaneous plexus and the papillary plexus consist of

1. A network of arteries to provide dermal supply
2. A network of nerves to provide dermal sensation
3. Gland cells that release cutaneous secretions
4. Specialized cells for cutaneous sensations

Question-67. The function of vagus nerve innervating the heart is to

1. Reduce the heart beat
2. Accelerate the heart beat
3. Maintain constant heart beat
4. Initiate the heart beat

Question-68. The generation of excitation-contraction coupling involves all the following events except

1. Release of calcium from troponin
2. Formation of cross-linkages between actin and myosin
3. Hydrolysis of ATP to ADP
4. Generation of end-plate potential

Question-69. The thin and convoluted outer layer of gray matter that covers the cerebral hemispheres is

1. Thalamus
2. Cerebral cortex
3. Meninges
4. Medulla oblongata

Question-70. There are ______ pairs of cranial nerves arising from the brain.

1. 12
2. 18
3. 25
4. 8

Question-71. Vestibular apparatus is made up of three semi circular canals. These canals lies at ____ degree angle to each other.

1. 45
2. 60
3. 90
4. 30

Question-72. When a neuron is in resting state i.e. not conducting any impulse, the axonal membrane is

1. Comparatively more permeable to Na+ ions and nearly impermeable to K+ ions
2. Equally permeable to both Na+ and K+ ions
3. Impermeable to both Na+ and K+ ions
4. Comparatively more permeable to K+ ions and nearly impermeable to Na+ ions

Question-73. Which layer is in contact with brain tissues?

1. Arachnoid
2. Duramater
3. Piamater and Arachnoid
4. Piamater

Question-74. Which neuroglia cells produce a fatty insulating material called myelin?

1. Schwann cells
2. Both (A) and (B)
3. Neither (A) nor (B)
4. Satellite cells

Question-75. Which of the following is not related to the autonomic nervous system?

1. Digestion
2. Excretion
3. Memory and learning
4. Peristalsis

Question-76. Which of the following nerves is the largest of all the cranial nerves?

1. Oculomotor nerve
2. Olfactory nerve
3. Trigeminal nerve
4. Abducens nerve

Question-77. Which one of the following is the correct statement regarding the particular psychotropic drug specified?

1. Hashish causes after thought perceptions and hallucinations
2. Opium stimulates nervous system and causes hallucinations
3. Morphine leads to delusions and disturbed emotions
4. Barbiturates cause relaxation and temporary euphoria

Question-78. Which one of the followings is the function of parasympathetic nervous system?

1. Pupil constriction
2. Acceleration of heart beat
3. Contraction of hair muscles
4. Stimulates oil and sweat glands in the skin

Question-79. Which portion of the brain is responsible for various emotions such as pleasure, fear, and happiness?

1. Reticular formation
2. Hypothalamus
3. Limbic system
4. Thalamus