Skeletal Muscle Flashcards
Skeletal muscle accounts for what percentage of body weight?
50%
How many different muscles are there in the body?
600
What are the three types of muscle?
- skeletal
- cardiac
- smooth
Smooth muscle is found in the …..
digestive system, blood vessels
What are the 5 muscle properties?
- contractility
- excitability
- conductivity
- elasticity
- adaptability
Contractility is…
ability to shorten and develop force
Excitability is…
ability to respond to a stimulus
Conductivity is…
ability to transmit electrical impusles throughout muscle
elasticity is…
ability to elongate (stretch) and return to original length
Adaptability is…
Ability to change characteristics following exposure to a stimulus
A stimulus would be considered …
training, de-training, immobilization
What is a muscle attachment?
location on bone where muscle connects
The origin of a muscle is…
attachment point thats less movable (the fixed end)
The insertion of a muscle is….
attachment point thats more movable (ie. wrist to elbow)
The characteristics of the bone in which muscles are attached to are…
tubercles, trochanters, crests
What criteria are used to name skeletal muscles?
- location (intercostal muscle)
- shape (deltoid muscle)
- size (gluteus maximum)
- direction of fascicles (rectus abdominis)
- location of attachments (brachioradialis)
- number of origins (biceps)
- actions (adductor brevis)
What are prime movers?
muscles providing major force for a specific movement