I looked it up and it was “c. Silicon “
The answer is; Ca2+ from the sarcoplasmic reticulum binds to tropomyosin
When the ca2+ ions bind to the tropomyosins on the actin filament, the tropomyosins are displaced and this exposed the myosin binding sites on the actin filament. The ADP + Pi (attached to the myosins heads), from the previous cycle, is released allowing the cocking of the myosin heads hence pulling on the actin filament. ATP then binds on the ATP-site on the myosin heads casing a release of the myosin heads from their site in the actin. This also hydrolyzes the ATP. This is one cycle of the cross-bridge cycle.
Answer:
comparing and contrasting on rivers and lakes
Explanation:
rivers are a running body of water that outputs into lakes bays and oceans, lakes are a steady not running body of water which houses lots of animals and plants.