Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

17 Cards in this Set

  • Front
  • Back
glycogen is found in white or red muscle
mitochondria found more in white or red muscl
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
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
fast twitch / glycolitic
fewer mito and blood supply
Intermediate fibers