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23 Cards in this Set
- Front
- Back
composes wall of heart
involuntary |
cardiac muscle
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lines internal orans and is involuntary
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smooth muscle
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muscle that attaches to the skeleton via tendons
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skeletal muscle
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agonist
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initiates the desired movement
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antagonist
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opposes the moving (agonist) muscle
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3 properties of skeletal muscle
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1. elasticity-stretch
2. extentisibility-ability to returnt to resting length 3. contractility-ability to shorten and produce tension |
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3 muscle actions
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1. concentric-muscle overcomes load and shortend
2. eccentric-mucle lengthens 3. isometric-muscle doen't shorten or lengthen |
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sarcoplasmic reticulum
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stores calcium
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Transverse tubules
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pass through muscle fiber. carry impulses and transport substances
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Sarcomere
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smallest funtional unit of muscle
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describe the sliding filament theory of muscle contraction
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1. action potential is received from motor neuron
2. SR releases calcium in to sarcoplasm 3. calcium binds with troponin 4. troponin shifts tropomyosin off of binding site on the actin 5. myosin attaches to actin and with ATP performs a power stroke 6. Actin slides over myosin |
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Muscle spindles
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-located in the muscle
-measure length change and speed of length change -signal muscle contraction |
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Golgi tendon organs
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-located in musculotendionous region
-recognize change in muscle tension -signal muscle to relax |
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Axial skeleton is composed of
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skull
vertebral column sternum ribs |
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Appendicular skeleton is composed of
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shoulder girdles
arms legs hips |
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shapes of bones
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long
short flat irregular |
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bone tissue is also called
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oseous tissue
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hematopoiesis
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formation of red and white blood cells
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bone grows longitudinally as long as _______ _______ remain open
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Epiphyseal plates
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After epiphyseal plates close, bone grows in
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thickness
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resorbtion
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loss of bone tissue
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List the 3 types of bone cells and what they do
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1. osteoclasts-destroy bone
2. osteoblasts-form bone 3. osteocytes-mature osteoblasts |
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Tendons
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connect muscle to bone
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