animal responses Flashcards
3 types of muscle
cardiac
smooth (involuntary)
skeletal
what is cardiac muscle
specialised exitatory and conductive muscle fibres
where is cardiac muscle only found
heart
where is smooth muscle found
internal organs and vessels
arrangement of smooth muscle
irregular
speed of contraction of SM
slow
shape of SM
spindle shaped
describe the nuclei of SM
uni-nucleated
sarcoplasm
muscle cytoplasm
sarcolemma
cell membrane of muscle cell
what is skeletal muscle responsible for
movement
myogenic
contracts without an action potential
troponin
protein attaches actin filaments to tropomyosin and also binds to Ca2+ ions
muscle fibres
specialised cells containing many nuclei
what is a muscle fibre made of
thousands of muscle fibres
tropomyosin
fibrous protein that wraps around actin
sacromere
region bw 1 Z band to the next of a myofibril
unit of contraction of a muscle
sarcomere
M line
perpendicular to myosin filaments where these filaments join up
myosin
fibrous protein that thick filaments are made of-
what forms dark A bands
myosin
myofibrils
regularly arranged small tubular structures in the s.plasm of the m.fibre
appearance of myofibrils under microscope
striped
sources of ATP
creatine phosphate
aerobic respiration
anaerobic respiration
where is creatine phosphate stored
in muscle
Z line
perpendicular to actin filaments where these filaments join up
H zone/ band
only thick filaments- the darkest parts where where the parallel A and I bands overlap
sacroplasmic reticulum
specialised endoplasmic reticulum of a muscle fibre, containing high conc of Ca2+ ions
actin
globular protein that thin filament are made of
what forms the I band
actin
what is the joining part of cardiac cells called
intercalated discs
do cardiac muscle fatigue
no