Flashcards in Muscle part 3 Deck (8)
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1
What are the 3 phases of muscle twitch?
1. Latent phase
2. Contraction phase
3. Relaxation
2
What happens in the Latent phase?
signal for SR release of calcium, which then diffuses and bunts to troponin
3
What happens in the Contraction phase?
actin myosin cross-bridges form and power stroke of contraction draws the thin myofilaments (actin) towards the center of the sarcomere
4
What happens in Relaxation?
calcium is sequestered from the sarcoplasm back into the SR, tropomyosin reverts back to the position physically blocking the actin-myosin binding sites
5
The two factor that dictate graded response are:
1. Frequency of stimulation
2. Strength of stimulus
6
What are the types of contraction?
Isotonic
Isometric
7
_____ length of muscle changes as uniform tension is generated, resulting in movement
Isotonic
8
