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Nervous system - Quiz
Contributed by: Coles
  • 1. What is the primary function of the nervous system?
A) Filtering waste from the blood
B) Producing digestive enzymes
C) Coordinating actions and sensory information
D) Regulating skeletal muscle growth
  • 2. The nervous system works in tandem with which other system to respond to environmental changes?
A) Endocrine system
B) Digestive system
C) Lymphatic system
D) Respiratory system
  • 3. Approximately how long ago did nervous tissue first arise in wormlike organisms?
A) 1 billion years ago
B) 50 million years ago
C) 100 to 200 million years ago
D) 550 to 600 million years ago
  • 4. What are the two main parts of the nervous system in vertebrates?
A) Central and peripheral nervous systems
B) Sympathetic and parasympathetic systems
C) Somatic and enteric systems
D) Brain and autonomic system
  • 5. The central nervous system consists of which two components?
A) Brain and spinal cord
B) Brain and cranial nerves
C) Nerves and axons
D) Neurons and glial cells
  • 6. What is the primary component of the peripheral nervous system?
A) The spinal cord
B) The brain
C) Nerves
D) Glial cells
  • 7. What are nerves essentially composed of?
A) Enclosed bundles of axons
B) Synaptic vesicles
C) Neurovascular units
D) Clusters of glial cells
  • 8. What is another name for motor nerves?
A) Afferent nerves
B) Enteric nerves
C) Sensory nerves
D) Efferent nerves
  • 9. What is another name for sensory nerves?
A) Motor nerves
B) Afferent nerves
C) Sympathetic nerves
D) Efferent nerves
  • 10. The peripheral nervous system is divided into which two subsystems?
A) Sympathetic and parasympathetic
B) Central and enteric
C) Somatic and autonomic
D) Cranial and spinal
  • 11. The autonomic nervous system is subdivided into which systems?
A) Brain, cord, and nerve
B) Central, peripheral, and cranial
C) Sympathetic, parasympathetic, and enteric
D) Somatic, sensory, and motor
  • 12. Which system is activated in emergencies to mobilize energy?
A) Enteric nervous system
B) Somatic nervous system
C) Sympathetic nervous system
D) Parasympathetic nervous system
  • 13. Which system is activated when an organism is in a relaxed state?
A) Parasympathetic nervous system
B) Somatic nervous system
C) Enteric nervous system
D) Sympathetic nervous system
  • 14. What is the function of the enteric nervous system?
A) To regulate cerebral blood flow
B) To control limb movement
C) To manage emotional responses
D) To control the gastrointestinal system
  • 15. What are nerves that exit from the brain called?
A) Spinal nerves
B) Sensory nerves
C) Cranial nerves
D) Motor nerves
  • 16. What are nerves that exit from the spinal cord called?
A) Enteric nerves
B) Spinal nerves
C) Cranial nerves
D) Efferent nerves
  • 17. What is the specialized cell type that defines nervous tissue?
A) Neuron
B) Glial cell
C) Neurovascular unit
D) Axon
  • 18. How do neurons send signals to other cells?
A) Through electrochemical impulses along axons
B) Through muscular contraction
C) Through blood flow circulation
D) Through skeletal support
  • 19. What substances are released at chemical synapses?
A) Axonal fibers
B) Blood plasma
C) Glial factors
D) Neurotransmitters
  • 20. What is the role of glial cells?
A) Structural and metabolic support
B) Regulating heart rate
C) Transmitting sensory information
D) Generating digestive enzymes
  • 21. What regulates cerebral blood flow to satisfy neuron energy demands?
A) The enteric nervous system
B) The spinal cord
C) Sensory nerves
D) Neurovascular unit
  • 22. Which animals have no nervous system at all?
A) All worm species
B) Sponges, placozoans, and mesozoans
C) African elephants
D) Ctenophores and cnidarians
  • 23. What type of nervous system do ctenophores and cnidarians have?
A) Highly centralized brain
B) Diffuse nerve net
C) No nervous system
D) Brain and central cord
  • 24. Which animal has approximately 300 billion cells in its nervous system?
A) African elephant
B) Human
C) Cnidarian
D) Simple worm
  • 25. What is the medical specialty that studies disorders of the nervous system?
A) Neuroscience
B) Neurology
C) Cardiology
D) Endocrinology
  • 26. What field of science focuses on the study of the nervous system?
A) Neurology
B) Neuroscience
C) Biology
D) Anatomy
  • 27. What is a common problem in the peripheral nervous system?
A) Failure of nerve conduction
B) Overproduction of neurons
C) Excessive cerebral blood flow
D) Lack of glial cells
  • 28. What is the most fundamental property of a neuron?
A) Production of myelin
B) Communication via synapses
C) Storage of nutrients
D) Physical movement of muscles
  • 29. What does the term 'glia' mean in Greek?
A) Fiber
B) Signal
C) Glue
D) Insulation
  • 30. Which cells form myelin in the central nervous system?
A) Schwann cells
B) Microglia
C) Oligodendrocytes
D) Astrocytes
  • 31. Which cells form myelin in the peripheral nervous system?
A) Astrocytes
B) Neurons
C) Oligodendrocytes
D) Schwann cells
  • 32. What is the function of myelin?
A) Synaptic contact
B) Nutrient production
C) Pathogen destruction
D) Electrical insulation
  • 33. How do nerves reach every part of the body?
A) By branching repeatedly
B) By forming ganglia in muscles
C) By expanding via myelin
D) By regenerating cell bodies
  • 34. What structure wraps around axons to segregate them into fascicles?
A) Cell bodies
B) Synapses
C) Membranes
D) Ganglia
  • 35. What is the name of the membrane system that protects the CNS?
A) Myelin
B) Vertebrae
C) Skull
D) Meninges
  • 36. What is the outer layer of the meninges called?
A) White matter
B) Gray matter
C) Dura mater
D) Ganglion
  • 37. What protects the spinal cord?
A) Vertebrae
B) Dura mater
C) Basal ganglia
D) Skull
  • 38. Where do the cell bodies of somatic sensory neurons lie?
A) Brain cortex
B) Dorsal root ganglia
C) Basal ganglia
D) Cranial cavity
  • 39. What is a cluster of neurons in the brain or spinal cord called?
A) Nerve
B) Axon bundle
C) Ganglion
D) Nucleus
  • 40. What is a cluster of neurons in the periphery called?
A) Meninges
B) Nucleus
C) Ganglion
D) Vertebrae
  • 41. Which of these is an exception to the naming convention for clusters of neurons?
A) Cranial cavity
B) Spinal cord
C) Basal ganglia
D) Dorsal root ganglia
  • 42. What structure do sponge cells form that resembles a signal-receiving part of a synapse?
A) Myelin sheath
B) Axonal terminal
C) Synaptic vesicle
D) Postsynaptic density
  • 43. How do sponge cells communicate if they lack synaptic transmission?
A) Hormonal secretion
B) Neurotransmitter release
C) Electrical synapses
D) Calcium waves
  • 44. Where is the nerve net primarily concentrated in comb jellies?
A) Near the mouth
B) At the base of the tentacles
C) Evenly across the entire body
D) Along the spine
  • 45. How many primordial cell layers do radiata possess?
A) One
B) Two
C) Three
D) Four
  • 46. True or false: Sponges possess a nervous system.
A) False
B) Only in adult stages
C) True
D) Only in larval stages
  • 47. What simple action is mediated by calcium waves in sponges?
A) Rapid locomotion
B) Reproductive spawning
C) Whole-body contraction
D) Prey capture
  • 48. What function is currently unclear regarding the postsynaptic-like structures in sponges?
A) Their location within the cell
B) Their size
C) Their chemical composition
D) Their specific purpose
  • 49. Which neurons are responsible for activating contractions of the body wall in radiata?
A) Precursor cells
B) Intermediate neurons
C) Motor neurons
D) Sensory neurons
  • 50. What is the term for animals that have approximate mirror-image left and right sides?
A) Vertebrates
B) Protostomes
C) Bilateria
D) Deuterostomes
  • 51. When did the wormlike ancestor of Bilateria first appear in the fossil record?
A) Jurassic period
B) Devonian period
C) Cambrian period
D) Ediacaran period
  • 52. Which of the following is one of the three segments that gives rise to the brain?
A) Hypothalamus
B) Cerebrum
C) Forebrain
D) Thalamus
  • 53. Which group includes vertebrates, echinoderms, and hemichordates?
A) Deuterostomes
B) Arthropods
C) Molluscs
D) Protostomes
  • 54. On which side of the body is the nerve cord found in protostomes?
A) Ventral
B) Medial
C) Dorsal
D) Lateral
  • 55. Who originally proposed that the bodies of protostomes and deuterostomes are 'flipped over'?
A) Geoffroy Saint-Hilaire
B) Gregor Mendel
C) Louis Pasteur
D) Charles Darwin
  • 56. How many neurons are found in the male nematode C. elegans?
A) 383
B) 100
C) 302
D) 200
  • 57. Where does neural signal processing occur in the insect brain?
A) Salivary gland
B) Neuropil
C) Protocerebrum
D) Cell body
  • 58. What behavior do Mauthner cells trigger in fish?
A) Complex mating rituals
B) A fast escape response
C) Slow migration
D) Digestive regulation
  • 59. Which organisms are mentioned as having neurons used for pioneering experiments due to their enormous size?
A) Squid
B) Nematodes
C) Earthworms
D) Arthropods
  • 60. What provides sensory information on light and dark in earthworms?
A) Dual nerve cords
B) Transverse nerves
C) Photoreceptors on eyespots
D) The nerve ring
  • 61. How many neurons do hermaphrodite C. elegans have?
A) 302
B) 250
C) 450
D) 383
  • 62. Which of the following is an example of an arthropod sensory organ?
A) Nerve ring
B) Antennae
C) Spinal cord
D) Lateral line organ
  • 63. How is nervous system signaling described in the text?
A) Hormonal secretion
B) Broadcast signaling
C) Point-to-point signaling
D) Systemic diffusion
  • 64. What is the maximum speed mentioned for the fastest nerve signals?
A) Exceeding 10 meters per second
B) Exceeding 100 meters per second
C) Exceeding 50 meters per second
D) Exceeding 500 meters per second
  • 65. Where does the nervous system send output signals to activate a response?
A) The skin and hair
B) Muscles or glands
C) The lungs and heart
D) The liver and kidneys
  • 66. What is the name of the electrochemical waves that propagate along an axon?
A) Neurotransmitter cascades
B) Synaptic vesicles
C) Action potentials
D) Second messengers
  • 67. What are the storage containers for neurotransmitters in the presynaptic terminal called?
A) Synaptic clefts
B) Receptor channels
C) Action potentials
D) Synaptic vesicles
  • 68. What is the narrow space between the presynaptic and postsynaptic membranes called?
A) Second messenger system
B) Synaptic cleft
C) Ion channel
D) Axon terminal
  • 69. What neurotransmitter induces contraction when released at a motor neuron-muscle synapse?
A) Dopamine
B) GABA
C) Acetylcholine
D) Glutamate
  • 70. What rule states that a neuron releases the same neurotransmitters at all its synapses?
A) The synaptic strength rule
B) Dale's principle
C) The GABAergic principle
D) The plasticity law
  • 71. What determines whether the effect of a synapse is excitatory or inhibitory?
A) The length of the axon
B) The receptors activated
C) The size of the synaptic cleft
D) The neurotransmitter released
  • 72. What is the best-known form of neural memory?
A) Dendrite-to-dendrite communication
B) Long-term potentiation
C) Second messenger cascade
D) Action potential propagation
  • 73. What neurotransmitter is used by the reward-signalling pathway?
A) Dopamine
B) Acetylcholine
C) Glutamate
D) GABA
  • 74. What fundamental capability do neurons have besides sending signals to other cells?
A) Produce heat through metabolic activity
B) Exchange signals with each other
C) Store infinite amounts of sensory memory
D) Directly convert electricity into muscle tissue
  • 75. Which historical figure believed higher cognitive functions like language could not be explained mechanistically?
A) Walter Pitts
B) Descartes
C) Warren McCulloch
D) Charles Sherrington
  • 76. What school of psychology dominated the middle of the 20th century?
A) Behaviorism
B) Cognitivism
C) Functionalism
D) Structuralism
  • 77. What is the simplest type of neural circuit described in the text?
A) A basal ganglia integration pathway
B) A cerebral cortex loop
C) A reflex arc
D) A peripheral sensory chain
  • 78. Which area is involved in the complex processing of visual signals for motor planning?
A) Spinal cord
B) Sensory receptors only
C) Cerebral cortex
D) Simple reflex arcs
  • 79. What is the ability to extract biologically relevant information from combinations of sensory signals called?
A) Feature detection
B) Stimulus-response association
C) Universal computation
D) Intrinsic pattern generation
  • 80. What allows neurons to generate rhythmic sequences of action potentials in isolation?
A) Voltage-sensitive ion channels
B) Myelin sheath insulation
C) External sensory stimuli
D) Synaptic fatigue
  • 81. What is the approximate period of circadian rhythmicity?
A) 48 hours
B) 1 hour
C) 12 hours
D) 24 hours
  • 82. What controls circadian alternations in behavior such as the sleep-wake cycle?
A) Immediate sensory responses
B) External temperature changes
C) Circadian fluctuations in neural activity
D) Reflexive muscle contractions
  • 83. What generates circadian rhythms according to experimental studies?
A) A genetic clock
B) A chemical feedback loop in the blood
C) A mechanical pacemaker
D) An external solar sensor
  • 84. In which species have mirror neurons been directly observed?
A) Fungal species
B) Reptilian species
C) Amphibian species
D) Primate species
  • 85. Which embryonic layer gives rise to the nervous system?
A) Endoderm
B) Ectoderm
C) Epidermis
D) Mesoderm
  • 86. What is the name for the sequence of stages from neural plate to neural tube?
A) Gastrulation
B) Neurulation
C) Induction
D) Mitosis
  • 87. What protein must be inhibited to induce neural tissue formation?
A) Hemoglobin
B) Collagen
C) BMP4
D) Insulin
  • 88. What is the name for neural precursor cells?
A) Osteoblasts
B) Fibroblasts
C) Neuroblasts
D) Myoblasts
  • 89. What is the primary function of the endoderm?
A) Forms the bones
B) Forms the muscles
C) Lines most internal organs
D) Forms the skin
  • 90. What is the function of the blood-brain barrier?
A) It regenerates damaged nerve fibers
B) It shields the CNS from physical impacts
C) It facilitates nerve impulse transmission
D) It prevents chemicals from moving into the CNS
  • 91. Why is CNS damage often more serious than PNS damage?
A) The CNS is not protected by bone
B) The PNS cannot regenerate at all
C) The CNS lacks protective membranes
D) CNS damage has more severe consequences
  • 92. What condition is caused by swelling at a tight bony channel?
A) Peripheral neuropathy
B) Carpal tunnel syndrome
C) Guillain-Barré syndrome
D) Leprosy
  • 93. What happens if a nerve is completely transected?
A) It will often regenerate
B) It turns into scar tissue
C) It dies immediately
D) It becomes idiopathic
  • 94. Which of these is a metabolic condition that can cause peripheral neuropathy?
A) Diabetes
B) Heavy metal poisoning
C) Shingles
D) Leprosy
  • 95. What term refers to cases of neuropathy with no identifiable cause?
A) Inflammatory
B) Transient
C) Transected
D) Idiopathic
  • 96. What can cause temporary loss of nerve function resulting in numbness?
A) Local anesthetic drugs
B) Genetic mutations
C) Heavy metal exposure
D) Permanent tissue destruction
  • 97. Why is the regrowth of spinal nerve fibers often blocked?
A) Scar tissue formation
B) Lack of calcium
C) The blood-brain barrier
D) Lack of blood supply
  • 98. Which field is combined with neuroscience in neurological practice?
A) Cardiology
B) Psychiatry
C) Oncology
D) Dermatology
  • 99. What is a chemical barrier to the central nervous system?
A) Vertebral column
B) Meningeal membranes
C) Blood-brain barrier
D) Skull
  • 100. Which disease is cited as an inflammatory condition causing peripheral neuropathy?
A) Carpal tunnel syndrome
B) Diabetes
C) Guillain-Barré syndrome
D) Shingles
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