muscle Flashcards
what is cardiac muscle
muscle in heart walls
what is involuntary muscle
smooth muscle which contracts without conscious control
what is a neuromuscular junction
structure at which a nerve meets the muscle, it is similar to a synapse
what is skeletal striated muscle
muscle under voluntary control
what are the two protein filaments in muscle cells which cause contraction
actin
myosin
muscles cant elongate without an …
antagonist
what are the three muscle types
involuntary
cardiac
voluntary
what are the shape of smooth muscle cells
spindle shaped
what is contained in smooth muscle cells
nucleus
bundle of protein filaments- actin and
where is smooth muscle located-
in tubular structures, such as blood vessels
where is cardiac muscle located
muscular part of the heart
describe cardiac muscle cells
form long fibres, which branch and from cross bridges
cardiac muscle forms cross bridges, what is the advantage of this
cross bridges ensure electrical stimulation is distributed evenly over chamber walls.
cardiac muscle contains intercalated discs, what do they do
specialised cell surface membrane which produce neuromuscular junctions allowing free diffusion of ions.
what does it mean if cardiac muscle is myogenic
it initiates its own contraction
