8
1. common green algal ancestor
2. embryo protection
3. apical growth
4. vascular tissue
5. megaphylis
6. seeds
7. flowers/ double fertilization/ endosperm/ fruit <span />
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.
I believe it is <span>resting potassium </span>channels also known as leak channels... But, I could be wrong.
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I hope this helps! </span>
Answer:
idkbut
Explanation:
I'm just geting points so like hee hee bro