Long Answer

Question 1

Summarize the process of the contraction of your biceps brachii muscle from the time the electrical impulse leaves your brain to innate the contraction

Answer 1

• voluntary movement to contract.
• directed by central nervous system.
• insisted when a signal travels to the neuromuscular junction.
• sliding filament theory.
• resting phase
• excitement-contraction: trigger mechanism, bind to troponin, tropomyosin shifts, cross-bridges in myosin attach to actin filaments. Force is dependant on cross bridges.
• contraction phase: ATP undergoes hydrolysis through an enzyme called ATPase, gives muscle energy.
• recharge phase: muscle contraction can’t occur unless there is supply of ATPase, calcium, myosin and ATP.
• relaxation phase: muscle goes back to its original place.