AHE: BLOCK 2: INTRO TO NERVOUS SYSTEM; CNS 1 (OF 2)
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Questions and Answers

What components are included in the Central Nervous System (CNS)?

  • Brain and spinal cord only (correct)
  • Cranial nerves and spinal nerves
  • Brain, spinal cord, and peripheral nerves
  • Peripheral nerves and ganglia
  • What is the primary role of sensory (afferent) pathways in the nervous system?

  • To transmit information from the CNS to skeletal muscles
  • To facilitate chemical communication in the CNS
  • To process and evaluate information
  • To carry information to the CNS from the external and internal environments (correct)
  • Which of the following statements correctly describes myelination differences between the CNS and the PNS?

  • Astrocytes provide myelination in both CNS and PNS.
  • Schwann cells myelinate axons in the PNS, while oligodendrocytes do so in the CNS. (correct)
  • In the PNS, myelination is performed mainly by oligodendrocytes.
  • Myelination does not significantly affect neural conduction speed.
  • What role does cerebrospinal fluid (CSF) play in the central nervous system?

    <p>It provides structural support and absorbs shock.</p> Signup and view all the answers

    Which of the following best describes the function of motor (efferent) pathways?

    <p>They transmit signals from the CNS to skeletal muscles.</p> Signup and view all the answers

    Which of the following correctly identifies the components of the central nervous system (CNS)?

    <p>Brain, spinal cord, meninges</p> Signup and view all the answers

    What are the three main components of a neuron?

    <p>Cell body, dendrites, axon</p> Signup and view all the answers

    How do sensory neurons differ from motor neurons?

    <p>Sensory neurons carry signals from receptors to the CNS, while motor neurons carry signals from the CNS to effectors.</p> Signup and view all the answers

    Which division of the nervous system is responsible for voluntary muscle control?

    <p>Somatic nervous system</p> Signup and view all the answers

    Which type of neural tissue primarily composes the outer layer of the brain?

    <p>Gray matter</p> Signup and view all the answers

    What is the primary function of neurotransmitters in the central nervous system?

    <p>To transmit signals between neurons</p> Signup and view all the answers

    Which structure connects different parts of the brain through nerve fibers?

    <p>Cerebral tracts</p> Signup and view all the answers

    What is the role of the meninges in the nervous system?

    <p>To provide cushioning and support to the CNS</p> Signup and view all the answers

    What does the somatic division of the nervous system primarily control?

    <p>Skeletal muscle movements</p> Signup and view all the answers

    Which component of a neuron is primarily responsible for receiving stimuli?

    <p>Dendrites</p> Signup and view all the answers

    What kind of signaling do neurons use for communication?

    <p>Chemical and electrical impulses</p> Signup and view all the answers

    Which part of the neuron is primarily composed of gray matter?

    <p>Cell body (soma)</p> Signup and view all the answers

    What characterizes the autonomic nervous system's response?

    <p>Involuntary and automatic</p> Signup and view all the answers

    Which division of the autonomic nervous system is responsible for the 'fight or flight' response?

    <p>Sympathetic division</p> Signup and view all the answers

    What is the role of glial cells in the nervous system?

    <p>Support and protect neurons</p> Signup and view all the answers

    What is indicated by the term 'amitotic' in the context of neurons?

    <p>Neurons do not undergo mitosis</p> Signup and view all the answers

    Study Notes

    Central Nervous System (CNS) Components

    • The CNS consists of the brain and spinal cord.

    Sensory (Afferent) Pathways

    • Sensory pathways transmit information from sensory receptors to the CNS.

    Myelination Differences

    • CNS myelination is formed by oligodendrocytes, while PNS myelination is formed by Schwann cells.

    Cerebrospinal Fluid (CSF) Role

    • CSF cushions the brain and spinal cord, provides nutrients, and removes waste products.

    Motor (Efferent) Pathways

    • Motor pathways carry signals from the CNS to muscles and glands.

    Central Nervous System (CNS) Components

    • The CNS is composed of the brain and spinal cord.

    Neuron Components

    • Neurons consist of a cell body (soma), dendrites, and an axon.

    Sensory vs. Motor Neurons

    • Sensory neurons transmit signals from sensory receptors to the CNS, while motor neurons transmit signals from the CNS to effectors.

    Voluntary Muscle Control

    • The somatic nervous system is responsible for voluntary muscle control.

    Outer Layer of the Brain

    • The outer layer of the brain is primarily composed of gray matter.

    Neurotransmitter Function

    • Neurotransmitters facilitate communication between neurons.

    Brain Connections

    • The corpus callosum connects different parts of the brain through nerve fibers.

    Meninges Role

    • The meninges protect the brain and spinal cord.

    Somatic Nervous System Control

    • The somatic nervous system controls skeletal muscle activity.

    Neuron Stimulus Reception

    • Dendrites are primarily responsible for receiving stimuli.

    Neuron Communication Signaling

    • Neurons use electrochemical signaling for communication.

    Gray Matter Location

    • Gray matter is primarily located in the cell bodies of neurons.

    Autonomic Nervous System Response

    • The autonomic nervous system controls involuntary bodily functions.

    'Fight or Flight' Response

    • The sympathetic division of the autonomic nervous system is responsible for the 'fight or flight' response.

    Glial Cell Role

    • Glial cells support and protect neurons.

    Neurons and Amitosis

    • The term 'amitotic' indicates that neurons generally do not undergo cell division.

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    Description

    Test your knowledge on the Central Nervous System (CNS) with this quiz. Explore components, pathways, and functions including sensory and motor neurons, cerebrospinal fluid, and neurotransmitters. Perfect for students of neuroscience and biology!

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