The Functions of the Nervous System
153 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What are the function of the nervous system?

  • Producing hormones
  • Processing sensory input (integration)
  • Both a and d (correct)
  • collecting (gathering information)

    • What is the purpose of sensory input in the nervous system?

  • To monitor changes occurring inside and outside the body. Changes= stimuli. (correct)
  • To produce hormones
  • Both A and B
  • change body temperature

    • What is the role of integration in the nervous system?

  • To digest food
  • To control body temperature
  • To process and interpret sensory input (correct)
  • To produce hormones

    • Which of the following best describes motor output?

    <p>A response to integrated stimuli (B)</p> Signup and view all the answers

    What is the purpose of motor output?

    <p>To activate muscles or glands (A)</p> Signup and view all the answers

    What happens when motor output is triggered?

    <p>Muscles or glands are activated (D)</p> Signup and view all the answers

    What are the two main classifications of the nervous system?

    <p>Structural and functional (C)</p> Signup and view all the answers

    Which organs are part of the central nervous system?

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

    What is the function of the central nervous system?

    <p>Integration; command center  Interpret incoming sensory information  Issues outgoing instructions (D)</p> Signup and view all the answers

    Which part of the nervous system carries impulses to and from the spinal cord?

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

    What is the function of the peripheral nervous system (PNS)?

    <p>To serve as communication lines among sensory organs, the brain and spinal cord, and glands or muscles (B)</p> Signup and view all the answers

    Which part of the nervous system carries impulses to and from the brain?

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

    Which division of the peripheral nervous system carries information from the skin, skeletal muscles, and joints?

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

    Which division of the peripheral nervous system carries impulses away from the central nervous system organs?

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

    Which type of nerve fibers carry information from visceral organs?

    <p>Visceral sensory fibers (A)</p> Signup and view all the answers

    Which division of the peripheral nervous system carries information from the skin, skeletal muscles, and joints?

    <p>Somatic sensory fibers (C)</p> Signup and view all the answers

    What is the purpose of sensory input in the nervous system?

    <p>To carry information to the central nervous system (A)</p> Signup and view all the answers

    Which type of nerve fibers carry information from visceral organs?

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

    Which division of the peripheral nervous system automatically controls smooth and cardiac muscles and glands?

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

    Which division of the peripheral nervous system is consciously controlled and responsible for controlling skeletal muscles?

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

    Which division of the peripheral nervous system is further divided into sympathetic and parasympathetic nervous systems?

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

    Which of the following is NOT a function of support cells in the CNS?

    <p>Generating electrical impulses (C)</p> Signup and view all the answers

    Which cells in the CNS are responsible for support, insulation, and protection of neurons?

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

    What are the general functions of support cells in the CNS?

    <p>Supporting, insulating, and protecting neurons (A)</p> Signup and view all the answers

    Which type of cells are abundant in the CNS and provide support to neurons?

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

    Which type of cells form a barrier between capillaries and neurons in the central nervous system?

    <p>Star-shaped cells astrocytes (C)</p> Signup and view all the answers

    What is the main function of support cells in the central nervous system?

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

    What do star-shaped cells in the central nervous system do?

    <p>Control the chemical environment of the brain (B)</p> Signup and view all the answers

    Which type of cells in the central nervous system are responsible for disposing of debris?

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

    What is the main function of microglia in the CNS?

    <p>Disposing of debris (B)</p> Signup and view all the answers

    Which glial cells in the CNS have a spiderlike appearance?

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

    Which type of cells line the cavities of the brain and spinal cord?

    <p>Ependymal cells (B)</p> Signup and view all the answers

    What is a function of ependymal cells in the CNS?

    <p>Assisting with circulation of cerebrospinal fluid (A)</p> Signup and view all the answers

    Which type of glial cells are responsible for supporting and protecting neurons in the CNS?

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

    Which type of cells in the central nervous system produce myelin sheaths?

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

    What is the function of CNS glial cells known as oligodendrocytes?

    <p>To produce myelin sheaths (B)</p> Signup and view all the answers

    Which type of cells form myelin sheath in the peripheral nervous system?

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

    What is the main function of satellite cells?

    <p>Protect neuron cell bodies (A)</p> Signup and view all the answers

    What is the major function of neurons?

    <p>To transmit messages (B)</p> Signup and view all the answers

    What are the major regions of a neuron?

    <p>Processes and cell body (B)</p> Signup and view all the answers

    Which part of the neuron is the nucleus and metabolic center of the cell?

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

    What are the fibers that extend from the cell body of a neuron called?

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

    What is the main function of neurons?

    <p>To transmit messages (C)</p> Signup and view all the answers

    Which organelle is responsible for protein synthesis in neurons?

    <p>Nissl bodies (C)</p> Signup and view all the answers

    What is the function of neurofibrils in neurons?

    <p>Maintaining cell shape (D)</p> Signup and view all the answers

    Where is the nucleus located in a neuron?

    <p>In the cell body (C)</p> Signup and view all the answers

    Which part of the neuron conducts impulses toward the cell body?

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

    How many axons do neurons have?

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

    What is the main function of axons in neurons?

    <p>Conduct impulses away from the cell body (C)</p> Signup and view all the answers

    Which part of the neuron conducts impulses away from the cell body?

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

    From where does the axon of a neuron arise?

    <p>The axon hillock (C)</p> Signup and view all the answers

    How many axons do neurons have?

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

    Which part of the neuron contains vesicles with neurotransmitters?

    <p>Axon terminals (B)</p> Signup and view all the answers

    What is the gap between adjacent neurons called?

    <p>Synaptic cleft (B)</p> Signup and view all the answers

    What is the junction between nerves called?

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

    Which part of the neuron is responsible for conducting impulses away from the cell body?

    <p>Axon terminals (B)</p> Signup and view all the answers

    What is the gap between adjacent neurons called?

    <p>Synaptic cleft (B)</p> Signup and view all the answers

    Where does the synapse occur?

    <p>At the axon terminals (A)</p> Signup and view all the answers

    Which part of the neuron is responsible for transmitting signals to the next neuron?

    <p>Axon terminals (B)</p> Signup and view all the answers

    What is the gap between adjacent neurons called?

    <p>Synaptic cleft (C)</p> Signup and view all the answers

    What is the junction between nerves called?

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

    Which cells produce myelin sheaths in the peripheral nervous system?

    <p>Schwann cells (B)</p> Signup and view all the answers

    What is the function of myelin sheaths in nerve impulse transmission?

    <p>To increase the speed of nerve impulse transmission (C)</p> Signup and view all the answers

    What are the gaps in the myelin sheath along the axon called?

    <p>Nodes of Ranvier (B)</p> Signup and view all the answers

    Which cells produce myelin sheaths in the peripheral nervous system?

    <p>Schwann cells (B)</p> Signup and view all the answers

    What are the gaps in the myelin sheath along the axon called?

    <p>Nodes of Ranvier (A)</p> Signup and view all the answers

    Which process is responsible for speeding up nerve impulse transmission?

    <p>Myelin sheaths (B)</p> Signup and view all the answers

    What is the term for the process of speeding up nerve impulse transmission?

    <p>Saltatory Conduction (C)</p> Signup and view all the answers

    What is the function of myelin sheaths in nerve impulse transmission?

    <p>To speed up nerve impulse transmission (D)</p> Signup and view all the answers

    Where are most neuron cell bodies found?

    <p>In the gray matter of the central nervous system (D)</p> Signup and view all the answers

    What are nuclei in the central nervous system?

    <p>Clusters of cell bodies within the white matter (A)</p> Signup and view all the answers

    Where are ganglia located?

    <p>In the peripheral nervous system (D)</p> Signup and view all the answers

    Which type of neurons carry impulses from the sensory receptors to the central nervous system?

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

    What do cutaneous sense organs detect?

    <p>Stretch or tension (D)</p> Signup and view all the answers

    What do proprioceptors detect?

    <p>Stretch or tension (B)</p> Signup and view all the answers

    Which part of the nervous system contains mostly unmyelinated fibers and cell bodies?

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

    What are bundles of nerve fibers in the peripheral nervous system called?

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

    What are collections of myelinated fibers in the central nervous system called?

    <p>White matter (B)</p> Signup and view all the answers

    Which type of neurons carry impulses from the central nervous system to viscera, muscles, or glands?

    <p>Motor (efferent) neurons (D)</p> Signup and view all the answers

    Where are interneurons found in the nervous system?

    <p>Found in neural pathways in the central nervous system (C)</p> Signup and view all the answers

    What is the function of interneurons in the nervous system?

    <p>Connect sensory and motor neurons (B)</p> Signup and view all the answers

    Which type of neurons have many extensions from the cell body?

    <p>Multipolar neurons (C)</p> Signup and view all the answers

    Which neurons are the most common in terms of structure?

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

    What is the structural classification of neurons based on?

    <p>Number of processes extending from the cell body (A)</p> Signup and view all the answers

    Which type of neurons are rare in adults?

    <p>Bipolar neurons (B)</p> Signup and view all the answers

    Where are bipolar neurons primarily located?

    <p>Special sense organs (C)</p> Signup and view all the answers

    What is the most common type of neurons in terms of structure?

    <p>Multipolar neurons (B)</p> Signup and view all the answers

    Which type of neurons have a short single process leaving the cell body?

    <p>Unipolar neurons (C)</p> Signup and view all the answers

    Which direction do unipolar neurons conduct impulses?

    <p>Both toward and away from the cell body (B)</p> Signup and view all the answers

    Which type of receptors are responsible for sensing pain and temperature?

    <p>Free nerve endings (D)</p> Signup and view all the answers

    Which type of receptors are responsible for sensing touch?

    <p>Meissner’s corpuscle (A)</p> Signup and view all the answers

    Which type of receptors are responsible for sensing deep pressure?

    <p>Lamellar corpuscle (B)</p> Signup and view all the answers

    Which property of neurons allows them to respond to a stimulus and convert it to a nerve impulse?

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

    What is the ability of neurons to transmit the impulse to other neurons, muscles, or glands called?

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

    What are the two functional properties of neurons?

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

    Which ion is the major positive ion inside the cell?

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

    What is the state of the plasma membrane in a resting neuron?

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

    What is the main positive ion outside the cell?

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

    Which ion is the major positive ion outside the cell?

    <p>Na+ (C)</p> Signup and view all the answers

    What is the main positive ion inside the cell?

    <p>K+ (C)</p> Signup and view all the answers

    What is the term for the resting state of a neuron, where the inside is more negative than the outside?

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

    Which statement best describes the resting state of a neuron?

    <p>The inside is more negative than the outside (A)</p> Signup and view all the answers

    What is the main factor that keeps a neuron at rest?

    <p>Negative ions inside the cell (C)</p> Signup and view all the answers

    Which ions are present in fewer numbers inside the cell compared to outside the cell?

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

    Which ion flows inside the neuron's membrane when it is depolarized?

    <p>Sodium (Na+) (A)</p> Signup and view all the answers

    What happens when a stimulus depolarizes a neuron's membrane?

    <p>The membrane becomes permeable to sodium (A)</p> Signup and view all the answers

    What is the initial effect of sodium channels opening in a neuron's membrane?

    <p>The membrane becomes permeable to sodium (C)</p> Signup and view all the answers

    Which type of potential exists where the inside of the membrane is more positive and the outside is less positive?

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

    What initiates an action potential in a neuron?

    <p>Ion movement (C)</p> Signup and view all the answers

    What activates the neuron to conduct an action potential?

    <p>Sodium influx (B)</p> Signup and view all the answers

    Which type of potential exists where the inside of the neuron's membrane is more positive and the outside is less positive?

    <p>Graded potential (C)</p> Signup and view all the answers

    What initiates an action potential in a neuron?

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

    What activates the neuron to conduct an action potential?

    <p>Strong enough stimulus and sodium influx (A)</p> Signup and view all the answers

    Which of the following is true about the propagation of nerve impulses?

    <p>If enough sodium enters the cell, the action potential starts and is propagated over the entire axon (B)</p> Signup and view all the answers

    What does the term 'all-or-none response' mean in relation to nerve impulses?

    <p>The nerve impulse either is propagated or is not (D)</p> Signup and view all the answers

    Which type of fibers conduct nerve impulses more quickly?

    <p>Fibers with myelin sheaths (D)</p> Signup and view all the answers

    Which of the following is true about the propagation of the action potential?

    <p>The action potential is always propagated over the entire axon (A)</p> Signup and view all the answers

    What does the term 'all-or-none response' mean in relation to nerve impulses?

    <p>Nerve impulses either are propagated or are not (B)</p> Signup and view all the answers

    Which type of fibers conduct nerve impulses more quickly?

    <p>Fibers with myelin sheaths (A)</p> Signup and view all the answers

    During repolarization, what happens to the membrane of a neuron?

    <p>The inside of the membrane becomes negatively charged (C)</p> Signup and view all the answers

    What is the role of potassium ions during repolarization?

    <p>They rush out of the neuron (D)</p> Signup and view all the answers

    Why can't a neuron conduct another nerve impulse until repolarization is complete?

    <p>The membrane becomes too negatively charged (B)</p> Signup and view all the answers

    During repolarization, what happens to the inside of the neuron's membrane?

    <p>It becomes negatively charged (B)</p> Signup and view all the answers

    What happens to potassium ions during repolarization?

    <p>They rush out of the neuron (D)</p> Signup and view all the answers

    What is the effect of incomplete repolarization on the neuron?

    <p>It cannot conduct another nerve impulse (A)</p> Signup and view all the answers

    During repolarization, what happens to the membrane of a neuron?

    <p>The membrane returns to its original configuration (C)</p> Signup and view all the answers

    What is the role of potassium ions during repolarization?

    <p>Potassium ions are returned to the cell (D)</p> Signup and view all the answers

    What is the function of the sodium-potassium pump in repolarization?

    <p>To restore the original configuration of the neuron (C)</p> Signup and view all the answers

    Which channels open when the action potential reaches the axon terminal?

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

    What happens when the electrical charge opens calcium channels at the axon terminal?

    <p>The neurotransmitter is released (C)</p> Signup and view all the answers

    What is the role of calcium channels in the transmission of a signal at synapses?

    <p>To release the neurotransmitter (B)</p> Signup and view all the answers

    Which ion is responsible for causing the fusion of vesicles containing neurotransmitter chemicals with the axonal membrane?

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

    What is the role of calcium channels in the transmission of a signal at synapses?

    <p>To release calcium ions into the synapse (D)</p> Signup and view all the answers

    What happens when the vesicles containing neurotransmitter chemicals fuse with the axonal membrane?

    <p>The neurotransmitter chemicals are released into the synapse (A)</p> Signup and view all the answers

    Which type of potential is generated if enough neurotransmitter is released at the synapse?

    <p>Graded potential (B)</p> Signup and view all the answers

    What are the two methods by which neurotransmitter is removed from the synapse?

    <p>Reuptake and enzymatic activity (D)</p> Signup and view all the answers

    What type of transmission occurs between neurons at the synapse?

    <p>Chemical transmission (C)</p> Signup and view all the answers

    Which type of potential is generated if enough neurotransmitter is released at the synapse?

    <p>Graded potential (C)</p> Signup and view all the answers

    What happens to the neurotransmitter molecules after they bind to receptors on the membrane of the next neuron?

    <p>They are quickly removed from the synapse (D)</p> Signup and view all the answers

    What is the main mode of transmission of an impulse between neurons?

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

    Which part of the nervous system is responsible for the electrical transmission of an impulse within a neuron?

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

    What are the two main methods by which neurotransmitter is removed from the synapse?

    <p>Reuptake and enzymatic activity (B)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of reflexes?

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

    What are reflexes responses to?

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

    What are neural pathways that reflexes occur over called?

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

    Which of the following best describes reflexes?

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

    What are neural pathways that reflexes occur over called?

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

    Which of the following is NOT a characteristic of reflexes?

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

    Which type of reflexes stimulate the skeletal muscles?

    <p>Somatic reflexes (C)</p> Signup and view all the answers

    Which type of reflexes regulate the activity of smooth muscles, the heart, and glands?

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

    What is an example of an autonomic reflex?

    <p>Regulation of smooth muscles (A)</p> Signup and view all the answers

    Which type of reflexes stimulate the skeletal muscles?

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

    Which type of reflexes regulate the activity of smooth muscles, the heart, and glands?

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

    More Like This

    Nervous System Functions Quiz
    4 questions

    Nervous System Functions Quiz

    HonorableAnemone avatar
    HonorableAnemone
    Nervous System Functions
    19 questions

    Nervous System Functions

    InstructiveDravite avatar
    InstructiveDravite
    Nervous System Functions Quiz
    10 questions

    Nervous System Functions Quiz

    HumourousHyperbola avatar
    HumourousHyperbola
    Functions of the Nervous System
    10 questions

    Functions of the Nervous System

    PowerfulHeliotrope949 avatar
    PowerfulHeliotrope949
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser