Sliding Filament Theory

Question 1

What is Action Potential

Answer 1

When you want to exercise you get a message from your brain to the muscles you want to use. To do this, nerve impulses run from the CNS to the muscles. This signal is called action potential

Question 2

What are Synapses

Answer 2

Where the nerve impulses passes across the muscle

Question 3

What is Acetylcholine

Answer 3

When the nerve transmits its signal, it releases acetylcholine. This creates an electrical signal which will allow the muscle to contract to produce movement

Question 4

In the Sliding theory, what is Initiating Contraction

Answer 4

The nervous system sends impulses to generate action potential. Acetylcholine is released which releases calcium ions. Calcium binds to Troponin and they myosin binding site is exposed.

Question 5

In the Sliding theory, what is Contraction

Answer 5

The nervous stimulation causes movement. As the sarcomeres contract the length of the myofibrils reduces bringing the muscles closer. The myosin makes a cross bridge and pulls on the actin, shortening the muscle

Question 6

In the Sliding theory, what is End of Contraction

Answer 6

When muscle contraction us no longer needed the nerve impulses stop, which stops releasing calcium. Without calcium, the myosin cannot attach to the actin.