Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
17 Cards in this Set
- Front
- Back
|
glycogen is found in white or red muscle
|
white
|
|
|
mitochondria found more in white or red muscl
|
red
|
|
|
how is endomysium different from epimysium and perimysium
|
it's loos CT w/ reticular fibers in addition to collagenous fibers
|
|
|
how do muscle cells develop
|
mesenchyme->myoblasts->myotubes from end to end fusion
myofilaments form |
|
|
persistent stem cells inbetween muscle fibers, have ONE nucleus
|
satellite cell
|
|
|
Amyotropic lateral sclerosis ALS
|
lou gherig's disease
anterior horn of spinal cord motor neurons, motor units successively de-innervated |
|
|
SR dilation at the A and I bands
|
terminal cisternae
|
|
|
what is the M-line made of
|
M line holds thick myosin together
made of myomesin and C protein Titin extends from M line to Z line stabalizing thick filaments |
|
|
What are thin filaments made of
|
F-actin(fibrous) filaments from G (globular) actin
|
|
|
what are thin filaments held in place by?
|
alpha actinin and nebulin anchor them to Z line
|
|
|
what secures Z lines of neighboring myofibrils to eachother?
|
desmin and vimentin
|
|
|
how are Z lines attached to the sarcolemma
|
intermediate filaments
|
|
|
during contraction describe what happens in terms of the bands of sarcomeres
|
H band gets smaller
I band gets smaller Z lines get closer A band width remains constant |
|
|
Ach release at NMJ
describe all the way through ca re-uptake |
binds to receptors at sarcolemma, N1 receptors-ligand gated ion channels let in mostly Na and K, depol transmitted through T tubules and hits SR, DHP v-sensor shifts foot processes and opens ryanodine Ca channel, Ca binds troponin C,
hydrol of ATP causes recock SR has just Ca ATPAse pump Sarcolemma has Ca ATPase and Na Ca exchanger |
|
|
Endurance fibers
|
RED
slow twitch / oxidative numerous mito w/ cytochromes(colored), increase myoglobulin and blood recieve steady state of constant stimulation smaller diameter and NMJ, wider Z lines |
|
|
Strength fibers
|
white
fast twitch / glycolitic fewer mito and blood supply |
|
|
Intermediate fibers
|
?
|
