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D Words
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Bonus Words
100
This controls the entire muscle cell and sends electrical impulses down to start the contraction process.
What is motor neuron
100
protein found in thin filament that has an active site and is capable of interacting with myosin.
What is actin
100
this causes sodium to rush into muscle cells
What is acetylcholine
100
Phosphates released from the cross bridge bond to this as ADP is lost
What is ATP
100
process where calcium levels decrease and detach from troponin. Active sites are recovered by tropomyosin
What is relaxation
200
A elongated contractile cell that forms the muscles of the body
What is muscle cell
200
Protein found in thick filament that reacts with actin
What is myosin
200
this binds with ACH on sarcolemma
What is receptors
200
as ACH causes this to be rushed into the cell an action potential is produced.
What is sodium
200
this forms when active sites are exposed and myosin heads are bound to them
What is cross bridge
300
This filament consists of a twisted strand of actin molecules that react with myosin.
What is thin filament
300
A membranous structure surrounding each myofibril and helps to transmit action potential to myofibril.
What is sarcoplasmic reticulum
300
ACH and receptors bind on the sarcolemma like this
What is lock and key
300
this is lost when ATP and phosphates bond
What is ADP
300
calcium binds to troponin to cause the tropomyosin to move and expose this
What is active site
400
Ion that binds to receptors on troponin molecule
What is calcium
400
transmit action potential throughout the cell
What is T Tubules
400
this electrical signal travels along a nerve axon ends at a synaptic terminal
What is action potential
400
ACH is released into this
What is synaptic cleft
400
this covers active sites in a state of rest and must be moved in order for myosin heads to attach to the active sites
What is tropomyosin
500
This filament contains myosin heads that repeatedly connect to actin molecules, pulling them inward to the center of the sarcomere.
What is thick filament
500
Membranes across the surface of this cell membrane lead into T tubules
What is sarcolemma
500
smallest functional unit of muscle fiber. Calcium released causes thin and thick filaments to interact causing muscle contraction.
What is sarcomere
500
calcium binds to troponin to cause tropomyosin to move by the removal of this
What is troponin complex
500
area where thick and thin filament overlap each other
What is zone of overlap