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15 Cards in this Set

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  • Back
Muscle twitch has how many phases? What are they?
Three phases:
Lag phase
Contraction
Relaxation
What is summation?
Increasing force of contraction of muscle fiber.
What is recruitment?
Increasing the number of muscle fibers contracting.
What is tetanus?
Sustained contraction that is immediately followed by another, hence the muscle does not reurn to a resting state (due to increased frequency of stimuli), the effects are added
What is fatigue?
Muscle eventually runs out of ATP, fibers cannot contract.
What is a characteristic of unfused (incomplete) tetanus?
Some relaxation occurs between contractions, the result is summation.
The force produced in _______ _______ stimulates receptor and membrane sensitivities to ________ factors, including ________ which lead to muscle growth and strength changes
activated fibers; anabolic; hormones
______ responses are tightly linked to the characteristics of the ________ _______ protocol.
hormone; resistance exercise
Training adaption is an increase in ______ and _______.
actin, myosin
______-chain myosin proteins can change in their structure from type IIb to IIa.
Heavy
Non-________ proteins are changed in order to establish structural integrity.
contractile
Hormones are involved in the ______ of protein and ______ mechanisms.
synthesis; degradation
Anabolic hormones promote tissue building;
1.
2.
3
4.
1. insulin
2. insulin-like growth factor
3. testosterone
4. growth hormone
Anabolic hormones also block the catabolic hormones; ______ and _______ which degrade muscle protein to support gluconeogenesis.
cortisol; progesterone
ahpp
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