https://padlet.com/wesrob807/ubhwbzz9iox0 Made with a warm hug en-us 2019-03-08 15:02:32 UTC 2024-05-17 05:50:10 UTC hello@padlet.com wesrob807 https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339328921 The brain sends a action potential down to a neuromuscular junction which causes the voltage gated calcium ion channels to open thus allowing calcium to enter the neuron. This release of calcium stimulates the release of ACh which binds to a ACh receptor sight and activates  voltage-gated Na+ ion channels. When Na+ is pumped in and K+ out, Na+ is pumped in more causing interior to become less negative and depolarized. Depolarization spreads to adjacent areas; opening voltage gated sodium channels that initiates an action potential. Na+ concentrations caused bu depolarization opens up voltage gated K+ pumps starting a re polarization process.]]> 2019-03-08 15:05:02 UTC https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339328921 wesrob807 https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329025 Step 1: The action potential moves down the sarcolemma and down the T tubules  

 

]]> 2019-03-08 15:05:12 UTC https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329025 wesrob807 https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329119 Step 2: Transmission of the action potential along the T tubules cause the adjacent sarcoplamic reticulum (SR) to release Ca2+ which flows into cytosol ]]> 2019-03-08 15:05:21 UTC https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329119 wesrob807 https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329231 Step 3 and 4: Ca2+ combines with troponin and removes the blocking actin of tropomyosin by changing the shape of the actin so that the myosin binding site are expose. This binding forms a cross bridge and starts contraction.

]]> 2019-03-08 15:05:32 UTC https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329231 wesrob807 https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329316 step 1: Cross bridge formation

]]> 2019-03-08 15:05:41 UTC https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329316 wesrob807 https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329415 Step 4: Cocking of the myosin head.]]> 2019-03-08 15:05:52 UTC https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329415 wesrob807 https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329535 Step 3: Cross bridge detachment ]]> 2019-03-08 15:06:03 UTC https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329535 wesrob807 https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329609 step 2: The power stroke ]]> 2019-03-08 15:06:10 UTC https://padlet.com/wesrob807/ubhwbzz9iox0/wish/339329609