Musculoskeletal 1- Functional Anatomy of Skeletal Muscle Flashcards
1
Q
What are the 4 major properties of muscle?
A
- contractility
- excitability
- extensibility
- elasticity
2
Q
Define contractility of a muscle.
A
the ability of a muscle to shorten, accompanied by mechanical force generation; plays a key role in movement
3
Q
Define Excitability of a muscle.
A
The capacity of a muscle to respond to stimulus.
4
Q
Define extensibility of a muscle.
A
the capacity of a muscle to be stretched to its normal resting length and beyond to a limited degree
5
Q
Define elasticity of a muscle.
A
The ability of muscle to recoil to original resting length after being stretched
6
Q
What are the 3 muscle tissue types?
A
- skeletal
- cardiac
- smooth
7
Q
Describe important features of skeletal muscle tissue.
A
- striated
- attached to bones via tendons
- multiple nuclei per cell, peripherally located
- under both voluntary and involuntary control (reflex)
8
Q
Describe important features of cardiac muscle tissue.
A
- muscle of the heart
- single nucleus, centrally located
- striated
- involuntary control
- intercalated disks
9
Q
Describe important features of smooth muscle tissue.
A
- not striated
- helps to form the walls of hollow organs, blood vessels, etc.
- single, centrally located nucleus
- gap junctions in visceral smooth muscles
