i need answer plz Skeletal Muscle Contraction and Sliding Filament Theory travel
ID: 209519 • Letter: I
Question
i need answer plz
Skeletal Muscle Contraction and Sliding Filament Theory travels down a motor neuron to the neuromuscular junction. a chemical neurotransmitter, is released by the motor neuron binds to receptors on the sarcolemma. This causes an AP to spread over the entire sarcolemma, and travels down the AP to the cell center. Next, the AP causes the release ,bringing the to Contraction: 1. The released ons bind to (protein), which changes the conformation of (protein) and exposes (myofilament). (energy molecule) bound to myosin at rest gives myosin energy to the active sites, forming a crossbridge. Myosin pulls actin 2. closer to the center of the 3. Myosin bead is stuck in the rigor state. Cycle is ready to begin again if a new (energy molecule) binds. If calcium remain in the cell, contractions continue with myosin heads reattaching to actin 4. Relaxatiorn 1. When the AP stops traveling down the motor neuron, ACh is no longer released at the synapse down ACh. The the sarcoplasm, which causes the original position, covering the hinding sites on actin. Myosin heads can no longer form an enzyme in the synaptic cleft, then breaks then recaptures ions from eons lan to position, coveringthe heidingsites on actinLMyos so the sarcomeres return to their original help of the spring action from titin (elastic protein),Explanation / Answer
Stimulation
An action potential (signal or impulse) travels down a motor neuron to the neuromuscular junction. Acetylcholine, a chemical transmitter... This causes an AP to spread over...., and travels down the T tubules, bringing AP to the cell center. Next, the AP causes the sarcoplasmic reticulum to release Calcium ions.
Contraction
1. The released Calcium ions bind to troponin, which changes the conformation of troponin and exposes binding sites for myosin on the actin filaments
2. ATP... gives myosin energy to bind to the active site forming croosbridge. Myosin pulls... closer to the center of the sarcomere
3. Cycle.... If a new ATP binds
Relaxation
When AP stops travelling.... synapse. Acetylcholinesterase, enzyme... ACh. The sarcoplasmic reticulum recaptures CA++ ions from the sarcoplasm, which causes the tropomyosin complex... Mysoin heads can no longer form crossbridges..
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.