Muscles Flashcards
types of muscle tissue
skeletal, smooth, cardiac
skeletal muscle
strained muscle/ voluntary; contracts rapidly found in fibers that connect t tendons that attach to bones
smooth muscle
no striations & involuntary; twi layers, contracts slow and sustained, found in stomach and respiratory system
cardiac muscle
strained and involuntary; slow contraction and controlled, found in heart
muscles functions
movement, maintaining posture, generating heat, stabilizing joints
muscles are responsible for mobility of body
movement
responsible for skeletal muscle
maintaining posture
maintaining normal body temperature
generating heat
true or false: muscles stabilize join that have poor fit
true
muscles properties
excitability, contractility, extensibility, elasticity
receive and respond to stimulus
excitability
can forcibly shorten themselves when stimulated
contractility
can be stretched
extensibility
can return back to normal state after being stretched
elasticity
muscles fatigue
lactic acid build up when body uses more oxygen in tissues than normal, leading to soreness, weakness, and burning sensation
oxygen deficit
oxygen shortage in cells by exercise
muscles tone
tension in muscles
flexion
decrease in angle in two joints (fetal position)
extension
increase angle in two joints
abduction
moving joint away from the body
adduction
joint moving towards body midline
circumduction
circular movement
muscles responsible for the bulk of the movement
prime mover
cannot move and can only be relaxed and stretched
antagonists
help prime movers by producing same movement by stabilizing the movement; being able to clench fist while wrist isn’t moving
synergists
muscles that maintained posture
fixators
what kills people with muscular dystrophy or myasthenia gravis
respiratory problems
