12.1
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Questions and Answers

Which division of the Peripheral Nervous System is primarily responsible for voluntary movements?

  • Autonomic nervous system
  • Parasympathetic division
  • Somatic nervous system (correct)
  • Visceral sensory receptors

    • What type of receptors monitor smell and taste within the sensory component of the PNS?

  • Visceral sensory receptors
  • Special sensory receptors (correct)
  • Somatic sensory receptors
  • Autonomic receptors

    • Which effectors are influenced by the sympathetic division of the autonomic nervous system?

  • Skeletal muscles
  • Adipose tissue (correct)
  • Smooth muscles (correct)
  • All of the above

    • What is the role of afferent division in the Peripheral Nervous System?

    <p>Relay sensory information to the CNS (B)</p> Signup and view all the answers

    Which aspect of the autonomic nervous system typically promotes rest and digestion?

    <p>Parasympathetic division (D)</p> Signup and view all the answers

    Somatic sensory receptors are responsible for monitoring which of the following?

    <p>Skeletal muscles, joints, and skin surface (C)</p> Signup and view all the answers

    Which division of the PNS is responsible for involuntary control over cardiac muscle?

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

    What are the primary components of the central nervous system?

    <p>Brain and spinal cord (B)</p> Signup and view all the answers

    Which division of the peripheral nervous system is responsible for carrying sensory information?

    <p>Afferent division (B)</p> Signup and view all the answers

    What type of muscle is primarily controlled by the parasympathetic division?

    <p>Cardiac muscle (C), Smooth muscle (D)</p> Signup and view all the answers

    Efferent signals from the CNS primarily target which type of recipients in the PNS?

    <p>Effectors (A)</p> Signup and view all the answers

    What type of tissue is primarily found in the central nervous system?

    <p>Nervous tissue (C)</p> Signup and view all the answers

    Which of the following structures connects to the brain as part of the peripheral nervous system?

    <p>Cranial nerves (D)</p> Signup and view all the answers

    Which of the following correctly describes the role of visceral sensory receptors?

    <p>Monitor internal organs and their functions (D)</p> Signup and view all the answers

    What role do effectors play in the nervous system?

    <p>They respond to motor commands (A)</p> Signup and view all the answers

    How do the peripheral nerves primarily function within the nervous system?

    <p>By carrying both sensory information and motor commands (D)</p> Signup and view all the answers

    What is the primary function of the central nervous system?

    <p>To coordinate the body's motor commands (A)</p> Signup and view all the answers

    Which of the following best describes the composition of peripheral nerves?

    <p>Bundles of axons with connective tissues and blood vessels (D)</p> Signup and view all the answers

    Which receptor type is NOT included in the peripheral nervous system's functional divisions?

    <p>Effector organs (D)</p> Signup and view all the answers

    What aspect of the brain is associated with higher functions such as intelligence and memory?

    <p>Cerebral cortex (C)</p> Signup and view all the answers

    What is the primary function of the somatic nervous system (SNS)?

    <p>Controls skeletal muscle contractions (B)</p> Signup and view all the answers

    Which division of the peripheral nervous system is responsible for subconscious actions?

    <p>Autonomic nervous system (ANS) (C)</p> Signup and view all the answers

    What distinguishes the sympathetic division from the parasympathetic division of the autonomic nervous system?

    <p>Sympathetic division has a stimulating effect, while parasympathetic has a relaxing effect (A)</p> Signup and view all the answers

    How many neurons are estimated to be in the enteric nervous system (ENS)?

    <p>Approx. 100 million (B)</p> Signup and view all the answers

    Which of the following actions is primarily controlled by the autonomic nervous system?

    <p>Contraction of cardiac muscle (B)</p> Signup and view all the answers

    What role does the enteric nervous system (ENS) play in the body?

    <p>Coordinates reflexes without CNS input (D)</p> Signup and view all the answers

    What type of muscle contractions does the autonomic nervous system (ANS) NOT control?

    <p>Skeletal muscle contractions (C)</p> Signup and view all the answers

    What is one of the primary neurotransmitters used by the enteric nervous system (ENS)?

    <p>Acetylcholine (D)</p> Signup and view all the answers

    Which component of the nervous system processes and coordinates sensory input and motor commands?

    <p>Central nervous system (CNS) (D)</p> Signup and view all the answers

    Which division of the peripheral nervous system is mainly associated with reflex responses?

    <p>Somatic nervous system (SNS) (D)</p> Signup and view all the answers

    Which type of receptors are responsible for monitoring internal organs within the Peripheral Nervous System?

    <p>Visceral sensory receptors (C)</p> Signup and view all the answers

    Which division of the autonomic nervous system is primarily associated with the 'fight or flight' response?

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

    Which type of muscle is influenced by the somatic nervous system?

    <p>Skeletal muscle (A)</p> Signup and view all the answers

    Which component of the afferent division is primarily responsible for monitoring skeletal muscles?

    <p>Somatic sensory receptors (D)</p> Signup and view all the answers

    In the context of the PNS, what role do effectors serve?

    <p>They respond to motor commands from the CNS. (C)</p> Signup and view all the answers

    What is the primary responsibility of the central nervous system?

    <p>Process and coordinate sensory data (A)</p> Signup and view all the answers

    Which of the following best defines the function of the afferent division of the peripheral nervous system?

    <p>Relays sensory information from receptors to the CNS (C)</p> Signup and view all the answers

    What is the primary characteristic of the somatic nervous system (SNS)?

    <p>It exclusively involves voluntary muscle control. (B)</p> Signup and view all the answers

    Which structure is NOT considered part of the central nervous system?

    <p>Nerve fibers (D)</p> Signup and view all the answers

    What distinguishes the sympathetic division of the autonomic nervous system from the parasympathetic division?

    <p>The sympathetic division stimulates bodily functions. (A)</p> Signup and view all the answers

    What type of tissue primarily constitutes the peripheral nervous system?

    <p>Nervous tissue (D)</p> Signup and view all the answers

    Which of the following is NOT a primary function of effectors in the nervous system?

    <p>Detect sensory stimuli (D)</p> Signup and view all the answers

    Which function is primarily coordinated by the enteric nervous system (ENS)?

    <p>Management of visceral reflexes in the digestive tract. (D)</p> Signup and view all the answers

    What type of cells may serve as receptors in the peripheral nervous system?

    <p>Neurons or specialized cells (A)</p> Signup and view all the answers

    How does the autonomic nervous system (ANS) influence muscle types?

    <p>It regulates smooth muscle and cardiac muscle contractions. (D)</p> Signup and view all the answers

    Which of the following statements about peripheral nerves is accurate?

    <p>They transmit both sensory information and motor commands. (D)</p> Signup and view all the answers

    What is a primary role of the autonomic nervous system (ANS)?

    <p>It regulates subconscious functions and homeostasis. (C)</p> Signup and view all the answers

    Which neurotransmitters are utilized by the enteric nervous system (ENS)?

    <p>The same neurotransmitters as the brain. (A)</p> Signup and view all the answers

    Which division of the nervous system integrates, processes, and coordinates sensory input?

    <p>Central Nervous System (CNS) (A)</p> Signup and view all the answers

    Which muscle types does the enteric nervous system (ENS) have a direct effect on?

    <p>Both smooth and cardiac muscles. (D)</p> Signup and view all the answers

    What is a notable feature of the efferent division of the peripheral nervous system (PNS)?

    <p>It includes both voluntary and involuntary control. (C)</p> Signup and view all the answers

    Which statement is true regarding the autonomic nervous system (ANS) divisions?

    <p>The sympathetic division prepares the body for 'fight or flight'. (B)</p> Signup and view all the answers

    Study Notes

    Anatomical Divisions of the Nervous System

    • The nervous system has two main anatomical divisions: central and peripheral.

    Central Nervous System (CNS)

    • The CNS includes the brain and spinal cord.
    • It's composed of nervous tissue, connective tissue, and blood vessels.
    • It processes and coordinates sensory data from inside and outside the body.
    • It controls activities of peripheral organs, such as skeletal muscles.
    • Higher brain functions include intelligence, memory, learning, and emotion.

    Peripheral Nervous System (PNS)

    • The PNS includes all nervous tissue outside the central nervous system (CNS) and enteric nervous system (ENS).
    • It delivers sensory information to the CNS.
    • It carries motor commands to peripheral tissues.
    • Nerves are bundles of axons with connective tissues and blood vessels.
    • Nerves carry sensory information and motor commands.
    • Cranial nerves connect to the brain.
    • Spinal nerves attach to the spinal cord.

    Functional Divisions of the PNS

    • Afferent division: Carries sensory information from receptors in peripheral tissues and organs to the CNS.
    • Efferent division: Carries motor commands from the CNS to muscles, glands, and adipose tissue.

    Receptors

    • Detect changes or respond to stimuli.
    • May be neurons or specialized cells.
    • May be single cells or complex sensory organs (like eyes and ears).

    Effectors

    • Target organs that respond to motor commands.

    Efferent Division of PNS

    • Somatic Nervous System (SNS): Controls skeletal muscle contractions (both voluntary and involuntary reflexes).
    • Autonomic Nervous System (ANS): Controls subconscious actions, contractions of smooth and cardiac muscle, and glandular secretions.
    • The ANS has two subdivisions: sympathetic (stimulating) and parasympathetic (relaxing).

    Enteric Nervous System (ENS)

    • Contains 100 million neurons in the walls of the digestive tract (as many or more than in the spinal cord).
    • Uses the same neurotransmitters as the brain.
    • Initiates and coordinates visceral reflexes locally without instructions from the CNS.
    • Can be influenced by the ANS.

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    Related Documents

    12-1 Divisions of the Nervous System PDF

    Description

    Explore the anatomy of the nervous system with this quiz, focusing on the central and peripheral divisions. Learn about the functions and components of the CNS, including the brain and spinal cord, as well as the role of the PNS in relaying information. Test your knowledge on this critical aspect of human biology.

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