Muscular System Flashcards
1
Q
What does the sequence of events that result in contraction of an individual muscle fibre begin with?
A
A signal, ACh innervating the fibre
2
Q
What happens after ACh innervates the fibre?
A
Local membrane of fibre depolarises
3
Q
When the local membrane of fibre depolarises what enters triggering the action potential to spread?
A
Na+
4
Q
When the local membrane of fibre depolarises what releases and triggers contraction and what is the contraction sustained by?
A
Ca2+ is released and triggers the contraction which is sustained by ATP
