Chapter 8 Lecture Flashcards
What are the three types of muscle tissue?
Skeletal, smooth, cardiac
What are the two types of tissue with action potiental?
Neurons and muscle tissue
What is myology?
The study of muscles
How much body weight is attributed to skeletal muscles?
20 to 40%
What are the four characteristics of muscle tissue?
Excitability, contractility, extensibility, elasticity
In reference to muscle cells, what does excitability mean?
can also be referred to as ‘irritable’, if you stimulate them, they will respond or action potiential
In reference to muscle cells, what is contractility mean?
Ability to shorten (due to sliding filament theory)
In reference to muscle cells, what does extensibility mean?
Ability to stretch longer than they are
In reference to muscle cells, what does elasticity mean?
Ability to come back to resting state after being streched
What is the primary function of skeletal muscle?
Primary function is to contract
Muscle tone refers to the…
partial contracting
Muscle tone and muscle ______ are the same
fibers
What are the 5 functions of skeletal muscle?
- Produce movement
- maintain posture and stability of body position
- Helps in functioning of internal organs through contractions
- Sphincter muscles guard entrance and exits to body
- Produce and maintain body temp
- Store nutrient reserves
What is the proper order of the anatomy of skeletal muscle?
*******
Entire muscle—->Fascicles—->Muscle fibers—–>Myofribrils; 1. Actin, 2. Myosin
What are fascicles?
Bundles of individual bundles of cells
What do t-tubules do?
Take action potential deep within muscle
What is action potential?
What tells the muscles when to contract
What are the layers of connective tissues associated with skeletal muscle?
Epiysium, Perimysium, Endomysium
Where is the epimysium located?
On the outside of the muscle
Where is the Perimysium located?
Lining the inside of the epimysium, and makes up the fasicles