Hae
  • Hae
  • Omat Kuvataulut

events at the neuromuscular junction

Luo Kuvakäsikirjoitus
Kopioi tämä kuvakäsikirjoitus
events at the neuromuscular junction
Storyboard That

Luo oma kuvakäsikirjoitus

Kokeile ilmaiseksi!

Luo oma kuvakäsikirjoitus

Kokeile ilmaiseksi!

Kuvakäsikirjoitus Teksti

  • I wonder what it is that causes me to be able to move? If it's not magic or a miracle, what could it be?
  • I can help with that! What you're talking about is ca;;ed the neuromuscular junction. It helps our bodies move around.
  • I don't believe you know what you're talking about, but i'll listen.
  • Alright. There are a variety of steps in the neuromuscular junction. In the first step, nerve impulses arrive at the axon terminals of a motor neuron and trigger the release of acetylcholine
  • After that, ACh diffuses and binds to its receptors. This triggers muscle action potential.
  • This is madness...
  • The action potential travels down the t tubule and opens calcium ion channels in the sarcoplasmic reticulum, and the calcium enters the sarcoplasm.
  • Acetylcholinesterase destroys ACh, which prevents more action potential from arising.
  • The calcium ion binds to troponin, which causes muscle contraction.
  • Oh ok......
  • Ca2+ channels will close, and calcium transport pumps will use ATP to restore the low levels of calcium in the sarcoplasm. 
  • Troponin will return to its original position to block myosin binding sites on actin, which will result in muscles relaxing. Both relaxation and contraction are important for movement.
  • WITCH!
  • Not really!!
Yli 30 miljoonaa kuvakäsikirjoitusta luotu