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OSSF Exam III Exam Questions and Answers |100% Pass what are the three main functions of the nervous system? - Answer-gather sensory input integration effects a motor output how does the nervous system gather sensory input? - Answer-by monitoring internal and external (environment) stimuli (c...

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  • October 6, 2024
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  • 2024/2025
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EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024




OSSF Exam III Exam Questions and
Answers |100% Pass

what are the three main functions of the nervous system? - Answer✔✔-gather sensory input


integration


effects a motor output


how does the nervous system gather sensory input? - Answer✔✔-by monitoring internal and external

(environment) stimuli (changes) using billions of sensory receptors


how does the nervous system integrate input? - Answer✔✔-processes and interprets sensory input and

makes decisions about what should be done


how does the nervous system effect.a motor output (response)? - Answer✔✔-by activating muscles or

glands


what is the afferent nervous system? - Answer✔✔-part of peripheral system - input cells/sensory


what is the efferent nervous system? - Answer✔✔-part of peripheral system - output cells/motor


what is the fundamental functional unit of the nervous system? - Answer✔✔-neuron (nerve cell)


how do neurons function? - Answer✔✔-sends and receives information via electrochemical transmission


what is a nuclei? - Answer✔✔-a collection of cell bodies located within the CNS


what is a ganglion? - Answer✔✔-a collection of cell bodies located outside the CNS

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what is a nerve? - Answer✔✔-a group of fibers (axons) outside the CNS


what is a tract? - Answer✔✔-a group of fibers inside the CNS


what is a funiculus? - Answer✔✔-bundles of fiber tracts


what is gray matter? - Answer✔✔-an area of unmyelinated neurons containing cell bodies, dendrites,

and some axons


where synaptic contacts occur


what is white matter? - Answer✔✔-an area of myelinated fiber tracts in the CNS


what do exterorecptors sense? - Answer✔✔-stimulation arising outside of the body (touch, pain,

temperature)


what do interoceptors sense? - Answer✔✔-stimulation arising inside the body (chemical messengers,

stretching of tissue, and internal temperature)


what do proprioreceptors sense? - Answer✔✔-responds to internal stimuli, but located only in skeletal

muscle, tendons, joints, and ligaments as well as in connective tissue covering bones and muscles


what are the 5 main receptor types and their detected stimuli? - Answer✔✔-mechanoreceptors (touch,

pressure, vibrations)


thermoreceptors (temperature)


photoreceptors (light)


chemoreceptors (smell, taste, blood chemistry)




Page 2/62

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FIRST PUBLISH SEPTEMBER 2024


nociceptors (pain)


what are Aa afferent fibers? - Answer✔✔-includes both 1a fibers from muscle spindles and 1b fibers for

the golgi tendon organ - types of proprioceptors


fastest, largest diameter


what are AB afferent fibers? - Answer✔✔-non-noxious mechanoreceptors


what are A- afferent fibers? (idk what that second symbol is) - Answer✔✔-noxious mechanoreceptors for

quick, intense pain


what are C fibers? - Answer✔✔-classic pain receptors - deep pain, visceral aching pain


can also respond to other stimuli - cat response to petting


slowest, smallest diameter


what contributes to afferent input? - Answer✔✔-spinal nerves via dorsal root ganglion (sensory)


cranial nerves (I, II, V, VII, VIII, IX, X) - some sensory, some motor, mixed


what are the efferent somatic outputs? - Answer✔✔-upper motor neurons and lower motor neurons


what are upper motor neurons? - Answer✔✔-motor cortex


brain stem


project to motor nuclei of brainstem or spinal cord - active voluntary movement in LMN


what are lower motor neurons? - Answer✔✔-final common pathway


project to muscles


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, EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024


also have reflexive actions - don't require UMN


what are the actions of sympathetic and parasympathetic systems usually? - Answer✔✔-reciprocal or

antagonistic


what is the sympathetic system involved in? - Answer✔✔-autonomic response to stressful external

stimuli


what is the parasympathetic system involved in? - Answer✔✔-controls autonomic functions in the

resting, unstressed animal


what are efferent signals to viscera, glands, smooth muscle, cardiac muscle, etc. influenced by? -

Answer✔✔-afferent feedback


how does autonomic output work in the CNS? - Answer✔✔-preganglionic - autonomic nuclei in

brainstem, autonomic nuclei in spinal cord, project to autonomic ganglia


how does autonomic output work in the PNS? - Answer✔✔-postganglionic - autonomic ganglia, project

to smooth and cardiac muscles, glands, and adipose tissue


what are the three main basic neuron types? - Answer✔✔-bipolar, unipolar, multipolar


what is the structure of most neurons? - Answer✔✔-multipolar


what are the functions of the plasma membrane of the cell body? - Answer✔✔-phospholipid bilayer

functions as a capacitor


provides structural support


determines morphology


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