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21 Cards in this Set
- Front
- Back
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what is a neuromuscular junction
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where axon and sarcolemma meet
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what is a synaptic cleft
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tiny space between the axon terminal and sarcolemma
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what is in the axon tip
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secretory vesicles
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what is a neurotransmitter
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acetylcholine
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what is acetylcholinesterase
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an enzyme that decomposes acetylcholine in the synaptic cleft
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why is this action neccessary
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to prevent over stimulation of muscle and to prepare for next stimulation
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what is creatine phosphate
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limited storage for of energy
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creatine phosphate is
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readily available
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describe atp and creatine phosphate
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there is 4 to 6 more creatine phosphate than atp plus its readily available. when atp is low creatine phosphate picks up the slack since atp takes longer to generate
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how is atp formed
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cellular resperation
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what are the 2 phases of cellular resperation
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anaerobic and aerobic
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where does anaerobic phase
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cytoplasm
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where does aerobic phase occur
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mitochondria
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which phase contains oxygen
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aerobic
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what is hemoglobin
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transports oxygen in red blood cell
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what is myoglobin
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molecule that stores a small amount of oxygen in muscle fibe
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what is fatigue
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a muscle that has been contracting for too long that doesn't respond to stimulatiojn
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what is threshold stimulus
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the minimum stimulus required to make a muscle contract
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what is an all or none response
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the muscle will either contract compeletely or not at all
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what is a tetanic contraction
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frequent stimuli where the muscle cant' relax
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what is maximal stimulaus
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contracts all muscle unti
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