Quiz 2 - Skeletal Muscle Function
Posture maintenance keeps the ______ in position to function correctly.
organs
What is Extensibility?
Extensibility is the ability to resume resting length(recoil).
The ______ is the attachment to the *immovable* or less movable bone.
Orgin
What is the main advantage of a 1st class lever?
The main advantage of a 1st class lever is the change in direction of the force - force exerted is equal to force lifted.
What is the main advantage of a 2nd class lever?
The main advantage of a second class lever is multiplication of force(strength) - force exerted is less than force lifted.
What is the main advantage of a 3rd class lever?
The main advantage of a third class lever is range of motion.
What is Contractility?
Contractility is the ability to receive and respond to stimuli.
What is Excitability?
Excitability is the ability to shorten forcibly.
____% of all the energy used by a muscle *escapes as heat* to maintain body temperature.
75%
What is a Agonist/Prime Mover?
A Agonist/Prime Mover is a muscle with the responsibility for moving a specific muscle.
What is a Fixator?
A Fixator is a special synergist that helps immobilize a bone or muscle organ.
The two microfilaments that are the contractile elements within a muscle cell are called ______ and ______.
Actin & Myosin
What is a Antagonist?
An Antagonist is a muscle the opposes or reverses the prime mover.
What is Elasticity?
Elasticity is the ability to be stretched or extended.
The ______ is the attachment to the *moveable* bone.
Insertion
During contraction, the muscles ______ moves toward the ______.
Insertion & Orgin
The 3 types of muscle tissue allow for ______ and ______ of the body and organs.
Movement & Manipulation
All muscles cross at least _____ joint.
One
The bulk of the muscle typically lies ______ to the joint crossed.
Proximal
Muscles can only _____ they never _____.
Pull & Push
What is a Synergist?
The Synergist aids an antagonist in moving and helps prevent rotation.
Muscles are attached to at least _____ points.
Two