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23 Cards in this Set
- Front
- Back
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contraction of skeletal muscle is..myogenic/neurogenic? |
neurogenic |
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from where does Ca2+ required for contraction come from? |
sarcoplasmic reticulum |
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what does a motor unit consist of? |
a motir neuron and the muscle fibres innervated by the neuron |
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what is the functional unit of skeletal muscle? |
sarcomere |
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for what is ATP required? |
contraction AND relaxation |
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What is a maximal contraction called? |
tetanus |
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what is the only type of muscle that can be tetanised? |
skeletal |
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what type of skeletal muscle contraction will be undergone when moving? |
isotonic |
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what type of skeletal muscle contraction will be undergone when holding a fixed position? |
isometric |
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what type of muscle fiber is used in prolonged work activity and is slow to fatigue? |
slow oxidative |
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what type of muscle fiber uses both aerobic and anaerobic metabolism? |
fast oxidative |
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what type of muscle fiber is anaerobic and used in high intensity exercise? |
fast glycotic |
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what sensory receptor within the muscle is activated by muscle stretch? |
muscle spindle |
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in rapid movement what happens to the viscocity of the synovium? |
viscocity decreases |
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what is cartilage? |
a dense extracellular matrix synthesized and degraded by chondrocytes |
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What does the extracellular matrix consist of? |
collagen, water and proteoglycans |
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what activates G coupled protein receptors? |
amines |
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what activates receptor kinases? |
proteins (ie insulin) |
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what activates class 1 nuclear receptors? where are they found within the cell? |
steroid hormones, found in the cytoplasm |
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what activates class 2 nuclear receptors? where are they found? |
lipids, found in the nucleus |
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what is a nociceptor? |
a sensory neuron that responds to dangerous/potentially dangerous stimuli by sending possible threat signals |
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what are the neurotransmitters of a nociceptor? |
glutamate and peptides |
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what causes referred pain? |
convergence of nociceptor receptors upon spinothalmic neurons. |
