quiz 5 muscles Flashcards
what are the three types of muscle
smooth, cardiac, skeletal
what is smooth muscle
lines organs/blood vessels, not voluntary, not striated
what is cardiac muscle
in heart only, not voluntary, is striated
what is skeletal muscle
attaches to bones or tendons, is striated
jobs of muscles
- muscles aid in posture
- muscles cause movement in internal organs
- muscles generate het for the body
- muscles are important for movement of the body
how do muscles aid posture
they help you stand or sit up straight
what does rector spinae do
hold head up
what does gastrocnemius and soleus do
keep le upright
soleus
calf
astronauts in space show significant
atrophy in calf, quads, back, and neck muscles
astronauts work in
zero gravity
what is the lost of mass of astronauts
20% loss of mass on 5-11 day flights
function of smooth muscle
involuntary, controls organs
what is peristalis
food pushed through GI tract
what does blood vessels dp
muscles cause vasoconstriction and vasodilation (blood pressure)
cremaster an dartos in testes
react to temperature. cremaster moves testes up (cold) r down (hot), dartos wrinkles (cold) or unwrnikles (hot) sacral skin
examples of smooth muscles that cause movement of internal organs
peristalsis, muscles in blood vessels, cremaster and darto in testes
why do muscles create heat when they contract .
- ATP hydrolysis is an exothermic reaction
- Friction between muscle fibers
generally, heat is a what of muscles working
an unwanted byproduct
when isn’t heat and unwanted byproduct of muscles working
shivering
what is shivering
muscles rapidly contract to produce heat when cold
how do muscles help the movement of Body
muscles work at levers to move bones
examples of muscles working as levers to move bones
bicep muscle shortens, pulls radius and ulna up
muscles very often work in what pairs
agonists , antagonists