5.1 types of muscle Flashcards
(29 cards)
what percentage of body mass does muscle tissue make up?
40%
what is muscle tissue made up of?
muscle fibres held together by connective tissue that can contract or relax to shorten and lengthen the muscle
what are the three types of muscle?
cardiac
smooth
skeletal
where is cardiac muscle found?
the heart
give some properties of cardiac muscle:
myogenic
doesn’t fatigue
contracts rhythmically
where is smooth muscle found?
lining many internal organs
is smooth muscle voluntary or involuntary?
involuntary - controlled by autonomic nervous system
how do smooth muscle fibres contract?
rhythmically
are slow muscle fibres slow or quick to fatigue?
slow
what is skeletal muscle essential for?
voluntary movement and maintaining posture
how is skeletal muscle attached to bones?
by tendons
is skeletal muscle voluntary or involuntary?
voluntary
how do skeletal muscle fibres appear?
striated
how do cardiac muscle fibres appear?
faintly striated
how do smooth muscle fibres appear?
non striated
how is skeletal muscle arranged and why?
regularly
so muscle contracts in one direction
how is cardiac muscle arranged and why?
branched cells that interconnect resulting in simultaneous contraction
how is smooth muscle arranged and why?
non regular arrangement
different cells can contract in different directions
what is the contraction speed of skeletal muscle?
rapid
what is the contraction speed of cardiac muscle?
intermediate
what is the contraction speed of smooth muscle?
slow
what is the length of contraction time for skeletal muscle?
short
what is the length of contraction time for cardiac muscle?
intermediate
what is the length of contraction time for smooth muscle?
long - remains contracted for a relatively long time
