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Physiology

Muscle Contraction

ConceptExplanation
Muscle Spindle Location throughout muscles and run in parallel with the main muscle fiber
Proprioceptors receptors that send sensory information to the CNS, that it uses to both construct awareness of body position & movement
(T/F) Muscle Spindles are important Proprioceptors True
(T/F) Alpha motor neurons do not drive voluntary muscle contractions False
(T/F) gamma motor neurons fine-tune the sensitivity of muscle spindles True
(T/F) Each motor neuron does not innervate multiple muscle fibers False
(T/F) In a mature animal, each muscle fiber receives input from a single motor neuron True
(T/F) All motor neurons in a motor neuron pool are not clustered together in the spinal cord False
(T/F) All motor neurons innervating a muscle is called a motor neuron pool True
Sarcoplasmic reticulum fxn Stores Ca(2+) to initiate muscle contraction
Transverse Tubules Form jxns with Sarcoplasmic reticulum & allow for depolarization to enter the interior of the muscle
rigor mortis constant contractoion caused by the depletion of adenosine triphosphate (ATP) in muscle tissue—the energy molecule required for muscle fibers to detach and relax
Molecule necessary to relax myosin head and release muscle from contraction ATP
Created by: satya.benoit
 

 



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