Muscular System Flashcards
Function of the Muscular System
- Movement
- Posture
- Heat production
Type of muscle which is attached to skeleton; spindle-shaped
Striated Voluntary or Skeletal Muscle
Controlled by voluntary nervous system via ________ _______ _________ in spinal and in some cranial nerves
Somatic Motor Nerves
Composed of muscle fibers bound together by a ________
Fascia
Each muscle contains several muscle bundle or _________
Fasciculi
Located in muscle layer of visceral organs
Smooth Involuntary or Visceral Muscle
Controlled by autonomic nervous sytem via ________ ___________ ____________ in autonomic, spinal, and some cranial nerves
autonomic motor neuron
Found in the heart
Striated Involuntary or Cardiac Muscle
Steps in Muscle Fiber Contraction
Electrical Energy transmitted (EET) , Calcium ion released (CIRZ) , ATP released causes contraction (ARCC).
Types of muscles as to action: bends
Flexor
Types of muscles as to action: straightens
Extensor
Types of muscles as to action: draws toward median
Adductor
Types of muscles as to action: away from median
Abductor
Types of muscles as to action: raises
Levator
Types of muscles as to action: lowers
Depressor
Types of muscles as to action: closes an opening
Constrictor
Types of muscles as to action: opens widely
Dilator
Types of muscles as to action: hand forward
Pronator
Types of muscles as to action: palm forward
Supinator
Types of muscles as to action: turns
Rotator
enlargement of a muscle
Hypertrophy
reduction in the size
Atrophy
subsequent contractions (Staircase Phenomenon)
Treppe
rapid, repetitive, involuntary skeletal muscle contractions
Shivering
