Ch 8, Muscular System, The Human Body in Health & Disease
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Created by:
quizrn on February 5, 2011
Subjects:
Description:
Chapter 8, The Muscular System, of The Human Body in Health & Disease book, Fifth edition.
Classes:
MA 110 - Anatomy and Physiology 1 - Gerow-Hackel, Casa Loma Vocational Nursing
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32 terms
Terms | Definitions |
|---|---|
 Skeletal Muscle | straited, voluntary, attaches to bone |
| Cardiac Muscle | cells branch frequently, keeps blood circulating |
| Smooth Muscle | moves food, nonstriated, involuntary, hollow internal organs, visceral muscle |
| origin | attachment to move stationary bones |
| insertion | attachment to more movable bone |
| body of the muscle | muscle unit excluding the ends |
| tendons | anchor muscles to bones |
| bursae | fluid-filled sacs |
| muscle fibers | elongated contractile cells of muscle tissue |
| actin | protein that forms thin myofilaments |
| sarcomere | basic functional unit of skeletal muscle |
| myosin | protein that forms thick myofilaments |
| myofilaments | elongated contractile cells of muscle tissue |
| muscles move bones by ______ | pulling |
| as a rule, only _____ bones move | insertion |
| the _____ bone moves the _____ bone | the origin bone moves the insertion bone |
| of all the muscles contracting simultaneously, the one mainly responsible for producing movement is called _____ _____ for that move. | prime mover |
| as prime movers contract, other muscles called _____ relax | antagonist |
| the biceps brachii is the prime mover during flexing, and the brachialis is its helper or _____ muscle | synergist |
| we are able to maintain our body position because of a specialized type of skeletal muscle contraction called _____ _____ | tonic contraction |
| _____ ______ maintains body posture by counteracting gravity | muscle tone |
| a decrease in temp, a condition known as _____, will drastically affect cellular activity & body function | hypothermia |
| energy required to produce a muscle contraction is from _____ | ATP |
| point of contact between nerve ending & muscle fiber is _____ | neuro muscular junction |
| motor neuron together with cells it innervates | motor unit |
| If muscle cells are stimulated repeatedly without adequate periods of rest, the strength of the muscle contraction will ______ resulting in fatigue | decrease |
| An adequate stimulus will contract a muscle cell completely because of the _____ theory | all or none |
| When oxygen supplies run low, muscle cells _____ _____ and other waste products during contraction | produce ATP |
| In a laboratory setting, a single muscle fiber can be isolated and subjected to ___ ____ _____ _____ so that it can be studied | stimuli of varying intensities |
| The minimal level of stimulation required to cause a fiber to contract is called the _____ _____ | threshold stmulus |
| _____ _____ bring about movements by pulling on bones across movable joints | skeletal muscles |
| A nervous system disorder that shuts off impulses to certain skeletal muscles may result in _____ | paralysis |
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