1. 3.5.3 Responses in the Human – Nervous System Follow-Me – iQuiz

2. Q. True or False. Motor neurons conduct impulses towards the central nervous system. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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4. Q. What is a neuron? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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6. Q. Briefly explain the role of neurotransmitter substances. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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8. Q. State a function for the Myelin sheath. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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10. Q. Give a function of dendrites. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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12. Q. What is a sensory neuron? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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14. Q. State a function for Schwann cells. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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16. Q. What is the central nervous system? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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18. Q. TRUE or FALSE. A motor neuron carries impulses to the brain. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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20. Q. What is peripheral nervous system? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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22. Q. What is a motor neuron? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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24. Q. Give one way in which a nervous response differs from a hormonal response. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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26. Q. State one function of the cerebrum of the brain. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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28. Q. What is grey matter? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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30. Q. What are interneurons or association neurons? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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32. Q. State one function of the hypothalamus of the brain. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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34. Q. What is white matter? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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36. Q. State one function of the cerebellum of the brain. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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38. Q. What term is used for glands that secrete hormones? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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40. Q. State one function of the medulla oblongata of the brain. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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42. Q. Name the small gaps between neurons. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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44. Q. Neurons produce neurotransmitter substances. What is their function? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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46. Q. Give an example of a reflex action in humans. Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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48. Q. Why are reflex actions important in humans? Brain and spinal cord Cell bodies of neurons; Few axons; Little myelin Faster; Shorter-lived; Electrical in nature Fast response; Defence against injury FALSE Knee-jerk Involuntary muscle control Insulation; Protection; Speeds impulse Homeostasis; Endocrine function Many axons; Much myelin; Few cell bodies Nerve cell Nerve that carries impulse from receptor towards CNS Nerves leading to and from CNS; Nerves not in CNS Nerves that link two neurons Language; Reason; Senses; Memory; Intelligence TRUE Receives and carries impulses to the cell body Produces myelin sheath Synaptic cleft; Synapse Carries impulse across synaptic cleft, triggers impulse in next neuron Movement; Balance; Coordination Carry impulse across synapse Nerve that carries impulse away from CNS to effector Endocrine

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