Muscular System

1 or 2

how many nuclei in cardiac muscle

multiple

how many nuclei in skeletal muscle

1

how many nuclei in smooth muscle

skeletal

which muscle tissue is voluntary

branches; striations

description of cardiac muscle

long cylindrical; striations

description of skeletal muscle

spindle/ pinched at the ends

description of smooth muscle

heart

where is cardiac muscle found

muscles/ bone and skin

where is skeletal muscle found

hollow organs

where is smooth muscle found

movement, balance, stabilizing joints, and heat generation

4 skeletal muscle functions

tendons

what attaches muscle to bone

... fascicle

a group of muscle fibers is a ...

... muscle

a group of fascicles are ...

epimysium

encloses the entire skeletal muscle

perimysium

encloses a fascicle

endomysium

encloses a single muscle fiber

sarcolemma

plasma membrane for a muscle cell

myofibril

long organelle that fills a muscle cell

twitch

brief, single muscle contraction

summing

addition of contractions

incomplete tetanus

not smooth, very short rests between contraction

complete tetanus

smooth, no rest between contractions

32 ATP

how much energy is stored in muscles

isotonic contraction

what type of muscle contraction: muscles shorten, movement occurs

isometric contraction

what type of muscle contraction: muscles can't shorten, no movement occurs

builds endurance, resistance to fatigue

how does aerobic exercise affect the muscles

changes size and strength

what does isometric exercise do to the muscles

rigor mortis

"hard death"

curare

arrowhead poison; used for intubation; causes respitory and cardiac arrest

myalgia: acute muscle pain

what disorder and type is immediate pain and longer contractions due to deficient blood supply

myalgia: delayed muscle pain

what disorder and type is after 24-48 hours from which you havn't done an activity in a while and tear muscle cells and fibers causing tissue swelling

duchenne muscular dystrophy

sex-linked recessive disorder diagnosed at a young age