Neural control and coordination MCQs with Answers

Question-1. Rods and cones of eyes are modified

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

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

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

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

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

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

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

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

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

Question-6. Afferent nerve fibres carry impulses from

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

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

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

Question-8. Arbor vitae is composed of

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

Question-9. Bowman’s glands are found in

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

Question-10. Characteristic feature of human cornea is that

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

Question-11. CNS is mostly made of

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

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

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

Question-13. Cornea transplantation is outstandingly successful because

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

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

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

Question-15. Ecdysis is shedding of

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

Question-16. Eustachian tube connects

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

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

Question-18. Frequency of sound is discriminated by

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

Question-19. Function of iris is to

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

Question-20. Hair present in the skin are

1. epidermal in origin and made of dead cells
2. epidermal in origin and made of living cells
3. dermal in origin and made of living cells
4. dermal 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. Movement of the eye ball
2. Swallowing
3. Movement of the tongue
4. Movement of the neck

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

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

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

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

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

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

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

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

Question-26. Iris is part of

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

Question-27. Ivan Pavlov performed experiments on

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

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

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

Question-29. Mark the incorrect statement

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

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

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

Question-31. One function of parasympathetic nervous system is

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

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

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

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. acetylcholine
2. norepinephrine
3. dopamine
4. GABA

Question-34. Respiratory centre is situated in

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

Question-35. Retina is most sensitive at

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

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

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

Question-37. Sensitive pigmented layer of eye is

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

Question-38. Sympathetic nervous system induces

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

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

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

Question-40. The cochlea of ear contains

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

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

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

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

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

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

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

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

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

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

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

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

Question-47. The threshold of a neuron is

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

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

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

Question-49. Vagus nerve is

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

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

1. 10-20 dB
2. 35-60 dB
3. 70-90 dB
4. 120-150 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. accommodation
2. adaptation
3. mutation
4. photoperiodism

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Question-62. Find the odd one.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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