Function

Question 1

Function of sacroplasmic reticulum

Answer 1

Control uptake and release of calcium ions
Which control ATPase activity
And therefore the contraction of the muscle

Question 2

Neuromuscular junction

Answer 2

-Impulse arrive cause vesicles to fuse with the pre-synaptic membrane and release acetylcholine into the gap
-Acetylcholine bind to receptors on muscle fibre membrane causing depo
-Depo travels down tubules
-Leads to Ca2+ release from stores in sacroplasmic reticulum
-Ca2+ binds to proteins in the muscle leads to contraction
-Acetylcholinesterase in gap breaks down acetylcholine so that -contraction only occurs when impulses arrive continuously