Term
| skeletal muscle functions |
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Definition
1. movement (main function)
2. heat production
3. posture:proper alignment body parts |
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Term
| skeletal muscle organ anatomy |
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Definition
muscle fiber (muscle cell)
blood vessels and nerves
connective tissue |
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Term
| skeletal muscle connective tissue types |
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Definition
epimysium
perimysium
endomysium
tendon |
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Term
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Definition
layer of dense regular connective tissue
covers outside of muscle |
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Term
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Definition
| extensions of epimysium inward dividing muscle into bundles |
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Term
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Definition
| thin layer of connective tissue which covers the individual muscle fibers in a muscle |
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Term
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Definition
| dense regular connective tissue which connects muscle to bone |
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Term
skeletal muscle fiber anatomy
types |
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Definition
sarcolemma
sarcoplasm
sarcoplasmic reticulum
myofibril |
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Term
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Definition
| plasma membrane of muscle fiber |
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Term
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Definition
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Term
sarcoplasmic reticulum
definition |
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Definition
(series of membranes)
store calcium (Ca++) ions |
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Term
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Definition
| cylinder shaped protein structures which extend entire length of the muscle fiber |
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Term
| myofibril composed of two types of monofilaments: |
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Definition
thick filaments
thin filaments |
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Term
thick filament
composed of |
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Definition
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Term
thin filaments
composed of |
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Definition
| three proteins: *actin *troponin *tropomysin |
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Term
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Definition
| thick and thin filaments arranged along the myofibril in units called sarcomeres |
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Term
sarcomere
sections (pg 347) |
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Definition
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Term
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Definition
| thin filaments attached to the z-lines |
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Term
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Definition
| composed only of thin filaments |
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Term
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Definition
| contains both thick and thin filaments |
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Term
| sarcomere/area between two Z-lines (disks) |
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Definition
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Term
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Definition
| invaginations of the sarcolemma |
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Term
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Definition
| all the T-tubules of a muscle fiber together |
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Term
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Definition
| T-tubule plus the sarcoplasmic reticulum on each side of it |
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Term
| nervous control of skeletal muscle contractions must be stimulated with |
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Definition
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Term
somatic motor neurons
definition |
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Definition
| neurons which conduct nerve impulses to skeletal muscle fibers |
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Term
neuromuscular junction
definition |
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Definition
| space between somatic motor neuron and the muscle fiber it supplies |
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Term
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Definition
| that portion of sarcolemma across from neuromuscular junction |
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Term
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Definition
| consists of a somatic motor neuron and all the muscle fibers it supplies within a muscle (pg 352) |
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Term
| the smaller the motor unit the more precise the muscle |
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Definition
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Term
| Energy sources for muscle contraction |
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Definition
*hydrolysis of ATP
*muscle cells that produce ATP |
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Term
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Definition
| ATP into ADP + P + energy = contraction |
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Term
| muscle cells produce ATP three ways |
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Definition
*aerobic cell respiration (95% ATP)
*hydrolysis of creatine phosphate (CP)
*anaerobic respiration (glycolysis) |
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Term
| two of the three ways muscles produce ATP that are produced in muscle only |
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Definition
hydrolysis
anaerobic respiration (glycolysis)pyruvate |
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Term
| muscle production of creatine phosphate and anaerobic respiration (pyruvate) creates |
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Definition
small amount of lactic acid (anaerobic)
for extra muscle energy of about 5 seconds |
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Term
muscle cells use aerobic respiration,
95% from ATP -do any other cells in the body use aerobic cell respiration? |
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Definition
| all other body cells use aerobic cell respiration too |
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