Muscle part 3 Flashcards Preview

AVS 371 > Muscle part 3 > Flashcards

Flashcards in Muscle part 3 Deck (8)
Loading flashcards...
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

_____ although tension is generated the muscle does not shorten because the tension does not exceed the resistance, thus position is maintained.

Isometric