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44 Cards in this Set
- Front
- Back
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What percentage of body weight is due to muscles?
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40-50% |
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The scientific study of muscles is called what?
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Myology |
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What are the three types of muscles in the human body?
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skeletal, cardiac, and smooth |
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What type of muscle powers the skeletal system?
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skeletal muscle |
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What two muscle types are striated?
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skeletal and cardiac |
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What type of muscle works mainly in a voluntary manner
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skeletal |
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What structure within the heart is responsible for its rhythmic contractions?
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pacemaker |
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The rhythmic beating of the heart is due to internal stimulation and thus it is referred to as what?
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autorhythmicity |
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Action potential in muscles is called what?
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muscle action potential |
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Muscle stretching is referred to as what?
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extensibility |
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Muscle’s ability to return to its original length is referred to as what?
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elasticity |
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The cells in muscle tissue form what?
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muscle fibers |
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The subcutaneous layer in muscle is called what?
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hypodermis |
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What type of connective tissue is found in muscle cells which separates muscle from skin is called what?
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areolar connective tissue |
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What tissue in muscle stores triglycerides, insulates the tissue and protects it?
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adipose tissue |
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What holds muscles with a similar function together?
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fascia |
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The outermost layer of irregular connective tissue that covers an entire muscle is called what?
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epimysium |
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as much as 70% of body heat is produced by energy produced in what tissue? |
muscle tissue |
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what form of energy represents the major product of glycolysis in muscles? |
eatting |
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what is the production of heat form metabolic functions referred to as? |
thermogenesis |
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because humans are capable of heating their own body, they are referred to as what? |
endotherms |
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the scientific study of muscles is known as what |
myology |
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what are the tree types of muscles in the human body |
skeletal, cardiac, smooth |
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what two types of muscles are striated? |
skeletal and cardiac |
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what type of muscle has intercalated dics |
cardiac muscle |
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what type of muscle functions as a voluntary muscle? |
skeletal |
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a built in caontraction of muscle has what type of beat |
autorhythmicity |
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what part of the nervous system is associated with cardiac and smooth muscle |
autonomic |
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an impulse that stimulates a muscle to contract is called what |
action potential |
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what are the chemicals called that are released by an axon to stimulate a muscle |
neurotransmitters |
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what subcutaneous tissue in muscles stores most of the triglycerides
an impulse that stimulates a muscle to contract is called what |
adipose tissue
action po |
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what is a dense sheet or broad band of irregular connective tissue that lines the body wall and limbs and supports and surrounds muscles and other organs of the body |
fascia |
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microscopic blood vessels that run through muscular tissue are called what |
capillaries |
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what type of muscle is generally multinucleated |
skeletal muscle |
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the plasma membrane of a muscle cell is called what |
sarcolemma |
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the sacroplasm of a muscle cell carries a red protein pigment that is important in its energy creating system.... |
myoglobin |
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the basic functional units in muscle tissue are called.. |
sarcomeres |
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what are the two primary proteins involved with contraction of muscle fibers |
myacine and actine |
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the junction between a nerve axon and muscular tissue is called.. |
neuromuscular junction |
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name a neurotransmitter that is important in stimulating muscle contraction |
acetylcholine |
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what enzyme is responsible for breaking acetylcholine down after an action potential has been created |
acetylcholine esterase |
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what makes smooth muscle act slower than cardiac and skeletal muscles |
no T tubules |
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most muscles in the body are derived from what |
mesoderm |
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as muscles develop in the embryonic body, they become bundles called.. |
somites |
