Chapter 7: Muscular System Flashcards
Basic functional unit of contraction of skeletal muscle
Sacromere
Which is not a muscle that moves the upper extremities
Rectus abdominus
Which is considered voluntary muscle
Skeletal
Which is not a type of muscle
Myosin (cardiac, smooth, skeletal)
Primary functions of skeletal muscle include all except
Line walls of hollow organs
Connects muscle to bone
Tendons
A single neuron and the muscle fibers it stimulates
A motor unit
The point a nerve fiber contacts a muscle cell
Neuromuscular junction
Muscle capacity to shorten and thicken
Contractibility
Muscle capacity to transmit electrical current
Excitability
Two proteins of muscle fiber threads or filaments
Actin and myosin
Do muscles pull or push
Pull
Muscle contractions require energy in the form of ____
ATP
What mineral is needed for muscle contraction
Calcium
To produce ATP muscle cells must have ____
Oxygen and nutrients
Which is not a benefit of exercise
Muscle atrophy
Two types of muscle contractions
Isotonic and isometric
Two forms of isotonic contractions
Eccentric and concentric
During eccentric contractions muscles ___
Lengthen
The main muscle that performs a given movement
Prime mover
The two types of muscle attachments of tendons to bones
Origin and insertion
Possible causes of muscle fatigue include all except
Anemic deniability
During isometric contractions muscle ___ does not change
Length
The muscle that makes up my hidden 6-pack
Rectus abdominus
The longest muscle of the human body
Sartorius
