GMS 6474 final exam with precise detailed solutions ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what does the SR store - correct answer✔✔proteins and calcium
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is the role of the transverse tubules in the muscle fiber - correct answer✔✔allow
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
inside of muscle to communicate with the outside of the muscle
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
how is a sarcomere measured - correct answer✔✔from z-disc to z-disc
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is contained in the I band of the sarcomere & what color is the band - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔thin filaments ||\\//|| ||\\//||
titin ||\\//||
z-disc
light (isotropic) ||\\//||
what is contained in the A band of the sarcomere & what color is the band - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔thick filaments ||\\//|| ||\\//||
thin filaments||\\//|| ||\\//||
dark (scatters light)||\\//|| ||\\//||
what is contained in the H zone & what color is the band - correct answer✔✔thick
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
filaments ||\\//||
light ||\\//||
no barbs or myosin
||\\//|| ||\\//|| ||\\//|| ||\\//||
middle zone of the sarcomere ||\\//|| ||\\//|| ||\\//|| ||\\//||
,what is contained in the M line - correct answer✔✔in the middle of the sarcomere, middle
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
of H zone ||\\//|| ||\\//|| ||\\//||
thick filaments ||\\//|| ||\\//||
myomesin
what does titin do in the sarcomere - correct answer✔✔structural protein
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
how many zones can you see when the sarcomere is relaxed - correct answer✔✔all zones
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
can be seen in relaxed state
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
how many zones can be seen when the sarcomere is contracted - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔sarcomere shortens ||\\//|| ||\\//||
I band shortens
||\\//|| ||\\//|| ||\\//||
H zone disappears
||\\//|| ||\\//|| ||\\//||
thick and thin filaments overlap DONT shorten ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is the contractile unit of skeletal muscle - correct answer✔✔the sarcomere
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is the main component of the thick filaments - correct answer✔✔myosin
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
have heavy and light chains ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
motor heads that move it along the thin filament ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is the largest protein in the body - correct answer✔✔titin
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what are the main components of the thin filaments - correct answer✔✔actin (where
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
myosin binds) ||\\//||
troponin (moves tropomyosin when Ca2+ is present) ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
,tropomyosin (covers actin active site) ||\\//|| ||\\//|| ||\\//|| ||\\//||
nebulin (sets thin filament length) ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
CapZ (anchors actin to Z-line on z-disc side) ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Tropomodulin (on end of actin, in middle of sarcomere) ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
alpha-actinin (anchors actin to z-line) ||\\//|| ||\\//|| ||\\//|| ||\\//||
what does desmin do in the sarcomere - correct answer✔✔interacts with alpha-actinin to
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
anchor z-disc to sarcolemma ||\\//|| ||\\//|| ||\\//||
what does dystrophin do in the sarcomere - correct answer✔✔connects sarcomere to
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
sarcolemma ||\\//||
stabilizes the sarcolemma to prevent damage during contractions ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
1st step of cross-bridge cycle - correct answer✔✔BINDING
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
activated myosin binds to actin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ADP and Pi are still bound to myosin
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
2nd step of cross bridge cycle - correct answer✔✔POWER STROKE
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
myosin head swivels ||\\//|| ||\\//||
movement of actin filament ||\\//|| ||\\//|| ||\\//||
ADP and Pi released from myosin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
(Pi is released first, before ADP is released)
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
3rd step of cross bridge cycle - correct answer✔✔DISSOSCIATION
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ATP binds to myosin ||\\//|| ||\\//|| ||\\//|| ||\\//||
Actin and myosin dissociate (cross bridge detaches)
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
, 4th step of cross bridge cycle - correct answer✔✔ACTIVATION
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ATP hydrolysis energy activates myosin head
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ADP and Pi remain bound to myosin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
if Ca2+ still present, cycle continues
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
how does Ca2+ effect the cross bridge cycle - correct answer✔✔Ca2+ is needed for the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
troponin to move the tropomyosin off the actin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
when Ca2+ runs out, the cross bridge cycle will stop ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
troponin has 4 Ca2+ binding sites ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
how does Ca2+ get into the cell to trigger the cross bridge cycle - correct answer✔✔through
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
the RyR channels, which are activated by the DHPR channel mechanical change IN
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
SKELETAL MUSCLES ||\\//||
what are the two roles of ATP in the cross bridge cycle - correct answer✔✔release from
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
rigor state ||\\//|| ||\\//||
re-energize/reactivate myosin heads for next cycle ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what resequesters Ca2+ to end muscle contraction - correct answer✔✔SERCA
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
where is the sarcoplasmic reticulum located - correct answer✔✔wrapped around the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
sarcomeres and throughout the myofibrils ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is the role of the sarcoplasmic reticulum in muscle cells - correct answer✔✔stores
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Ca2+ that is needed for contraction ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what does the SR store - correct answer✔✔proteins and calcium
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is the role of the transverse tubules in the muscle fiber - correct answer✔✔allow
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
inside of muscle to communicate with the outside of the muscle
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
how is a sarcomere measured - correct answer✔✔from z-disc to z-disc
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is contained in the I band of the sarcomere & what color is the band - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔thin filaments ||\\//|| ||\\//||
titin ||\\//||
z-disc
light (isotropic) ||\\//||
what is contained in the A band of the sarcomere & what color is the band - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔thick filaments ||\\//|| ||\\//||
thin filaments||\\//|| ||\\//||
dark (scatters light)||\\//|| ||\\//||
what is contained in the H zone & what color is the band - correct answer✔✔thick
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
filaments ||\\//||
light ||\\//||
no barbs or myosin
||\\//|| ||\\//|| ||\\//|| ||\\//||
middle zone of the sarcomere ||\\//|| ||\\//|| ||\\//|| ||\\//||
,what is contained in the M line - correct answer✔✔in the middle of the sarcomere, middle
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
of H zone ||\\//|| ||\\//|| ||\\//||
thick filaments ||\\//|| ||\\//||
myomesin
what does titin do in the sarcomere - correct answer✔✔structural protein
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
how many zones can you see when the sarcomere is relaxed - correct answer✔✔all zones
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
can be seen in relaxed state
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
how many zones can be seen when the sarcomere is contracted - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔sarcomere shortens ||\\//|| ||\\//||
I band shortens
||\\//|| ||\\//|| ||\\//||
H zone disappears
||\\//|| ||\\//|| ||\\//||
thick and thin filaments overlap DONT shorten ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is the contractile unit of skeletal muscle - correct answer✔✔the sarcomere
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is the main component of the thick filaments - correct answer✔✔myosin
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
have heavy and light chains ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
motor heads that move it along the thin filament ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is the largest protein in the body - correct answer✔✔titin
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what are the main components of the thin filaments - correct answer✔✔actin (where
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
myosin binds) ||\\//||
troponin (moves tropomyosin when Ca2+ is present) ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
,tropomyosin (covers actin active site) ||\\//|| ||\\//|| ||\\//|| ||\\//||
nebulin (sets thin filament length) ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
CapZ (anchors actin to Z-line on z-disc side) ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Tropomodulin (on end of actin, in middle of sarcomere) ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
alpha-actinin (anchors actin to z-line) ||\\//|| ||\\//|| ||\\//|| ||\\//||
what does desmin do in the sarcomere - correct answer✔✔interacts with alpha-actinin to
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
anchor z-disc to sarcolemma ||\\//|| ||\\//|| ||\\//||
what does dystrophin do in the sarcomere - correct answer✔✔connects sarcomere to
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
sarcolemma ||\\//||
stabilizes the sarcolemma to prevent damage during contractions ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
1st step of cross-bridge cycle - correct answer✔✔BINDING
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
activated myosin binds to actin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ADP and Pi are still bound to myosin
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
2nd step of cross bridge cycle - correct answer✔✔POWER STROKE
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
myosin head swivels ||\\//|| ||\\//||
movement of actin filament ||\\//|| ||\\//|| ||\\//||
ADP and Pi released from myosin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
(Pi is released first, before ADP is released)
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
3rd step of cross bridge cycle - correct answer✔✔DISSOSCIATION
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ATP binds to myosin ||\\//|| ||\\//|| ||\\//|| ||\\//||
Actin and myosin dissociate (cross bridge detaches)
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
, 4th step of cross bridge cycle - correct answer✔✔ACTIVATION
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ATP hydrolysis energy activates myosin head
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ADP and Pi remain bound to myosin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
if Ca2+ still present, cycle continues
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
how does Ca2+ effect the cross bridge cycle - correct answer✔✔Ca2+ is needed for the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
troponin to move the tropomyosin off the actin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
when Ca2+ runs out, the cross bridge cycle will stop ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
troponin has 4 Ca2+ binding sites ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
how does Ca2+ get into the cell to trigger the cross bridge cycle - correct answer✔✔through
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
the RyR channels, which are activated by the DHPR channel mechanical change IN
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
SKELETAL MUSCLES ||\\//||
what are the two roles of ATP in the cross bridge cycle - correct answer✔✔release from
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
rigor state ||\\//|| ||\\//||
re-energize/reactivate myosin heads for next cycle ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
what resequesters Ca2+ to end muscle contraction - correct answer✔✔SERCA
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
where is the sarcoplasmic reticulum located - correct answer✔✔wrapped around the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
sarcomeres and throughout the myofibrils ||\\//|| ||\\//|| ||\\//|| ||\\//||
what is the role of the sarcoplasmic reticulum in muscle cells - correct answer✔✔stores
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Ca2+ that is needed for contraction ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
