Week 4 Video 1 - Muscle and skeletal muscle Flashcards
What % of body weight does muscle constitute of?
40-50%
What are the four characteristics of muscle?
Excitability, contractility, extensibility, elasticity
Excitable means…
Muscles must be able to respond to stimuli
Contractible means…
Muscles must be able to contract
Extensible means..
Muscles must have the ability to stretch/extend
Elastic means
Muscles must have the ability to return to original shape
What are the 3 important functions of muscle?
Motion, stability, heat production
2 types of motion:
Voluntary and involuntary
Voluntary movement:
Using a knife and fork
Involuntary movement:
Heart beating, churning of food in stomach
Types of muscle tissue…
Smooth, cardiac, skeletal
Smooth muscle is…
Non striated and is involuntary
Cardiac muscle is…
Striated and involuntary
Skeletal muscle is…
Striate and voluntary
Where is smooth muscle found?
Walls of hollow internal structures such as blood vessels, stomach intestines
