Chapter 7: Muscular System Flashcards
The ability of muscles to be stretched
Extensibility
This muscle has the ability to cause the diameter of blood vessels to decrease on contraction
Smoothe Muscle
This structure contains membrane fused at places called intercalated disks; a communication system at the fused area will not permit cells to act independently
Cardiac Muscle
The part of the muscle attached to the movable part of the bone; it is the most movable during a contraction
Insertion
A characteristic shared with nerve cells; the ability to respond to stimulus
Excitability
The part of the muscle attached to a fixed point on the bones; the least movable part of the bone
Origin
Muscles only pull and never push; they are attached to the bones of the skeleton by these nonelastic cords
Tendons
The ability of a muscle to return to its original length after stretching
Elasticity
The ability of the muscle to shorten , which reduces the distance between the parts of its contents
Contractility
Muscles that open and close to control the passage of substances
Dilator
Muscles used for laughing or smiling
Zygomaticus Major
Broad sheet muscle used responding to horror
Platysma
Muscle structure that opens wide, so that food and drink can get inside
Orbicularis Oris
Surrounds the eye orbit underlying the eyebrows
Orbicularis Oculi
Muscle that raises eyebrows and wrinkles the forehead (sits over the eyebrows)
Frontalis
