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    Act 14 (Gollon, Hanz. Chua Valiant) NERVOUS SYSTEM

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    s9036282
    This document summarizes a student's activity labeling diagrams of the nervous system of a toad. It includes labeled diagrams of the toad's spinal nerves, dorsal brain, and cross section of the spinal cord. It also answers questions about the relative size of the cerebellum in frogs compared to other animals, factors influencing the number of spinal nerves, and a table classifying the 12 pairs of cranial nerves in humans by type and function.

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    Act 14 (Gollon, Hanz. Chua Valiant) NERVOUS SYSTEM

    Uploaded by

    s9036282
    11 views3 pages
    This document summarizes a student's activity labeling diagrams of the nervous system of a toad. It includes labeled diagrams of the toad's spinal nerves, dorsal brain, and cross section of the spinal cord. It also answers questions about the relative size of the cerebellum in frogs compared to other animals, factors influencing the number of spinal nerves, and a table classifying the 12 pairs of cranial nerves in humans by type and function.

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    NERVOUS SYSTEM zoology

    Original Title

    Act 14 (Gollon, Hanz. Chua Valiant)NERVOUS SYSTEM

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    This document summarizes a student's activity labeling diagrams of the nervous system of a toad. It includes labeled diagrams of the toad's spinal nerves, dorsal brain, and cross section of the spinal cord. It also answers questions about the relative size of the cerebellum in frogs compared to other animals, factors influencing the number of spinal nerves, and a table classifying the 12 pairs of cranial nerves in humans by type and function.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    11 views3 pages

    Act 14 (Gollon, Hanz. Chua Valiant) NERVOUS SYSTEM

    Uploaded by

    s9036282
    This document summarizes a student's activity labeling diagrams of the nervous system of a toad. It includes labeled diagrams of the toad's spinal nerves, dorsal brain, and cross section of the spinal cord. It also answers questions about the relative size of the cerebellum in frogs compared to other animals, factors influencing the number of spinal nerves, and a table classifying the 12 pairs of cranial nerves in humans by type and function.

    Copyright:

    © All Rights Reserved
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    Activity #14 NERVOUS SYSTEM

    Student’s Name _Chua Valiant, Gollon Hanz__ Date Performed __june12 2022___
    Course/Year/Section __LBYBIO A73A___ Date Submitted ____June13/06/2022__
    Instructor’s Name ___JAVIER, MARK ARCHEI O.____
    I. Label the following diagrams:
    A. Spinal nerves of the toad

    1.Right Sympathetic Trunk

    2.Dorsal Aorta

    3.Left Sympathetic Trunk

    4.Urostyle

    B. Dorsal aspect of the brain of the toad

    1. Olfactory lobe
    2. Cerebral Hemisphere
    3. Diencephalon
    4. Optic lobe
    5. Cerebellum
    6.Medulla oblongata

    7. Spinal Cord

    9. Filum Terminale
    C. Cross section of the spinal cord

    1. White matter

    2. Central Canal

    3. Gray matter

    II. Guide Questions:


    1. What could be the reason why the cerebellum of the frog/toad is relatively smaller compared
    to those found in birds and mammals?
    - Due to their more compact body the cerebellum does not need to be very big and can be
    smaller.

    2. The number of spinal nerves in frog tadpoles are 40 pairs as opposed to the number of spinal
    nerves in the adult frog. What possible factors could dictate or influence the number of spinal
    nerves in animals?
    - The reason for this would be because the tadpoles had tails and tails are expandable
    organs, which would be gone when the metamorphosis occurs.

    3. Unlike amphibians, reptiles, birds, and mammals (including humans) have 12 pairs of cranial
    nerves, instead of 10 pairs. Research on the 12 pairs of cranial nerves in humans. Fill up the
    table below by classifying them whether they are purely sensory (afferent), purely motor
    (efferent), or mixed nerves; indicate their function or innervation as well.

    Cranial Nerve Type Innervation/ Function

    Optic Sensory Vision

    Vestibulocochlear Sensory Balance & Hearing

    Olfactory Sensory Smell

    Oculomotor Motor Movements in the eye


    (opening of eyelid, eye
    movement, etc)

    Accessory Motor Shrugging of shoulder and


    head turning
    Hypoglossal Motor Movement of tongue

    Abducens Motor Eye movement (lateral rectus


    muscle)

    Trochlear Motor Eye movement (super


    oblique muscle)

    Trigeminal Both Mastication and Facial


    sensation

    Facial Both Facial movement, taste,


    hearing, closing of eyelids,
    and lacrimation

    Vagus Both Most of the ability of the


    mouth (swallowing, coughing,
    speech, etc), monitoring of
    baroreceptors and aortic
    chemoreceptors, and from
    parasympathetic innervation
    to the thoracoabdominal
    viscera

    Glossopharyngeal Both Taste, sensation, elevation of


    pharynx & larynx, and
    managing the nasal
    chemoreceptors,
    baroreceptors, and carotid
    body

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