Muscle Tissue
Skeletal muscle tissue appears ___ (banded) and has multiple ___.
striated/nuclei
The ORIGIN of the ADDUCTOR muscle is the:
pubic bone, acromion process, tibial tuberosity, calcaneus
pubic bone
___ fibers all run in the same direction, like in the sartorius muscle.
Parallel
Name the 4 characteristics of muscle tissue
contractility, extensibility, elasticity, irritability (excitability)
The ___ ___ is the muscle mainly responsible for a particular movement.
prime mover
A bundle of muscle fibers is called a
fascicle
The ACTION of the deltoid is arm ____.
abduction
___ muscle fibers are short and attached to a central tendon like in the rectus femoris.
Pennate
The characteristic possessed ONLY by muscle tissue is
contractility
The ___ is the muscle responsible for the movement of a muscle that opposes the prime mover and is located on the opposite side of the joint.
antagonist
____ surrounds each muscle fiber, electrically insulating them from one another
Endomysium
The ___ group of muscles flexes the knee and extends the hip--it is the backswing of the walking movement.
hamstrings
The adductor longus is named for what 2 things?
action and size
Muscle contraction generates 85% of our body's ___.
heat
___ stabilize the origin so the prime mover can isolate and perform a particular movement. You have lots of these in your hips.
Fixators
___ ___ binds muscles to skin.
Superficial fascia
The ___ is the prime mover of plantar flexion when the knee is extended.
gastrocnemius
The pectoralis major illustrates this fiber arrangement.
convergent
__% of the energy for contraction is lost as heat.
75%
The ____ is found on the moving bone where the muscle attaches.
insertion
___ muscle tissue is fatigue-resistant and contracts in slow, sustained contractions.
Smooth
The ___ is a synergist of forearm flexion and can be isolated when flexing the elbow with the palms facing posteriorly.
brachialis
The orbicularis oris has this fiber arrangement.
circular/concentric (or sphincter)
___ is the ability of muscle tissue to stretch beyond resting length.
Extensibility
A(n) ___ is a broad flat tendon that provides indirect attachment for muscles.
aponeurosis