What is the term used to describe the cytoplasm of a muscle fiber?
sarcoplasm
100
Bending movement that decreases the angle of the joint is:
Flexion
100
The muscle that is involuntary without striations is called?
Smooth
100
Where are the cross-brides located?
myosin heads
100
Which part of the muscle cell releases calcium ions?
Sarcoplasmic reticulum
200
The word that characterizes a specialized smooth endoplasmic reticulum :
sarcoplasmic reticulum
200
A movement that increases the angle of a joint
extension
200
In Myofibrils, the smallest fiber of muscle that contains actin and myosin filaments, what is another name for the contractile units?
Sarcomere
200
The area between two Z lines is called____________.
sarcomere
200
The insertion is the place where the muscle ______.
Attaches to a movable bone.
300
A connective tissue found in muscles that bound many fascicles together surrounding the entire muscle.
epimysium
300
Suprination has which definition:
(1) moving the palm of the hand from anterior position to posterior.
(2) moving the palm from posterior position to an anterior position
#2
300
What are the three layers of organization of fibers in the muscles? (Connective Tissue)
Epimysium, Perimysium and Endomysium.
300
Which theory explain how muscle cell slide?
Siding Filament Theory
300
Explain extension, flexion and hyperextension of the head,
Flexion of the head- bend head down towards chest
Extension of the head- move head from flexion to the the original position
Hyperextension- -pull head back as you look at the ceiling
400
When the axon of a nerve cell reaches a muscle cell this is called:
neuromuscular junction
400
What is the difference between adduction and abduction?
Adduction: to move toward the midline of the body
Abduction: to move away from the midline of the body
400
In the contraction of a muscle, what is process?
Application of calcium to the myofibrils, plus ATP energy molecule, including myosin and actin, and then finally Neuromuscular junction (synapse or end of the nerve).
400
Which system activates the muscle fiber to contract?
The Nervous System
400
Name the three muscle types and locations
skeletal- covers the bones of the skeleton
smooth- surrounds internal organs
cardiac- heart
500
The action potential is initiated by the _____________?
Na ion entering the muscle cell
500
Give the definition of Inversion and Eversion:
Inversion is related to feet, the movement of the sole towards the median plane.
Eversion, also is related to the feet, the movement of the sole goes away from the median plane.
500
What specific group of muscles have Actin and Myosin in them?
Skeletal Muscles
500
The movement of the sarcomere is energized by _________,
the muscle cell eventually ______________.
ATP ; shortens
500
What 4 functions does the Muscle Tissue provide?
Movement (skeletal muscle), Maintain posture, Stabilizes joints, Generates heat