Podcast
Questions and Answers
What is the primary function of sensory neurons?
What is the primary function of sensory neurons?
Which type of nerve is responsible for carrying impulses both to and from the brain?
Which type of nerve is responsible for carrying impulses both to and from the brain?
What protects the brain from physical damage?
What protects the brain from physical damage?
Which part of the nervous system includes cranial and spinal nerves?
Which part of the nervous system includes cranial and spinal nerves?
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What constitutes the central nervous system?
What constitutes the central nervous system?
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What initiates the process of a reflex action?
What initiates the process of a reflex action?
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Which part of the reflex arc connects sensory and motor neurons?
Which part of the reflex arc connects sensory and motor neurons?
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Which of the following reflexes are primarily controlled by the cerebrum?
Which of the following reflexes are primarily controlled by the cerebrum?
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How does alcohol affect reflex actions?
How does alcohol affect reflex actions?
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What occurs in the body during emergency situations according to the autonomous nervous system?
What occurs in the body during emergency situations according to the autonomous nervous system?
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What type of cells form the myelin sheath in the brain and spinal cord?
What type of cells form the myelin sheath in the brain and spinal cord?
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Which part of the nervous system is characterized by the presence of myelinated nerve cells?
Which part of the nervous system is characterized by the presence of myelinated nerve cells?
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What occurs to the electric charge on the plasma membrane when a neuron is stimulated?
What occurs to the electric charge on the plasma membrane when a neuron is stimulated?
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What is the role of neurotransmitters in the synapse?
What is the role of neurotransmitters in the synapse?
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What is the main function of oligodendrocytes and Schwann cells?
What is the main function of oligodendrocytes and Schwann cells?
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What is one of the primary roles of cerebrospinal fluid?
What is one of the primary roles of cerebrospinal fluid?
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Which of the following statements about the nerve impulse transmission is correct?
Which of the following statements about the nerve impulse transmission is correct?
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Which part of the brain is primarily responsible for coordinating muscular activities?
Which part of the brain is primarily responsible for coordinating muscular activities?
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Which neurotransmitter is mentioned as an example in the content?
Which neurotransmitter is mentioned as an example in the content?
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What is the primary function of the medulla oblongata?
What is the primary function of the medulla oblongata?
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In which scenario would an oligodendrocyte be functioning?
In which scenario would an oligodendrocyte be functioning?
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Which part of the brain analyzes impulses and acts as a relay station for the cerebrum?
Which part of the brain analyzes impulses and acts as a relay station for the cerebrum?
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How does the spinal cord differ in length between newborns and adults?
How does the spinal cord differ in length between newborns and adults?
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What surrounds the spinal cord for protection?
What surrounds the spinal cord for protection?
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What is the relationship between dorsal and ventral roots in the spinal cord?
What is the relationship between dorsal and ventral roots in the spinal cord?
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Which brain part plays a major role in maintaining homeostasis?
Which brain part plays a major role in maintaining homeostasis?
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What is the main function of receptors in organisms?
What is the main function of receptors in organisms?
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Which part of the nervous system is responsible for processing impulses generated by receptors?
Which part of the nervous system is responsible for processing impulses generated by receptors?
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Which of the following components is responsible for carrying impulses away from the neuron’s cell body?
Which of the following components is responsible for carrying impulses away from the neuron’s cell body?
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What is the role of the myelin sheath in neurons?
What is the role of the myelin sheath in neurons?
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Which part of the neuron is primarily involved in receiving impulses from adjacent neurons?
Which part of the neuron is primarily involved in receiving impulses from adjacent neurons?
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What is the primary function of the synaptic knob in a neuron?
What is the primary function of the synaptic knob in a neuron?
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What type of stimuli can cause responses in organisms besides external stimuli?
What type of stimuli can cause responses in organisms besides external stimuli?
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Which component of a neuron is primarily responsible for transmitting impulses from the cell body to other neurons?
Which component of a neuron is primarily responsible for transmitting impulses from the cell body to other neurons?
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Which part of the neuron carries impulses towards the cell body?
Which part of the neuron carries impulses towards the cell body?
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What primarily forms the myelin sheath around the axon?
What primarily forms the myelin sheath around the axon?
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Study Notes
Neuron
- Neuron or nerve cell is the basic structural unit of the nervous system
- Like all other cells, the neuron has a cell membrane, cytoplasm and nucleus.
- Analyze illustration 1.2 and tabulate the main parts of a neuron, its characteristics and function. Write them down in your Science diary.
Dendron
- Branches of dendron
- Part that receives impulses from adjacent neuron
- Short filament from the cell body
- Carries impulses from dendrites to the cell body
Axon
- Longest filament from the cell body
- Carries impulses from the cell body to outside
- Branches of axon
- Carries impulses to the synaptic knob
Schwann cell
- Encircles the axon
- Axons of most of the neurons are repeatedly encircled by myelin, a membrane containing lipid. This is called myelin sheath.
Synaptic knob
- Tip of axon
- Secretes neurotransmitter
Nucleus
- Located in the cell body
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Description
Test your knowledge on the functions and components of the nervous system. This quiz covers sensory neurons, nerve types, and structures protecting the brain. Ideal for students looking to understand the basics of neuroscience.
