The sarcomere will have uncontrolled muscle contractions.
Troponin blocks myosin-binding sites in the tropomyosin of the actin. If the troponin is damages, the myosin-binding sites will be exposed and myosin heads (of the myosin fiber) will be able to form cross-bridges with the actin even when not required.
Explanation:
This means the sarcomere will contract even when not required or expected hence resulting in symptoms like muscle spasms. Usually, troponin molecules exposes the myosin-binding sites on the tropomyosin upon binding of Ca²⁺ ions. These Ca²⁺ are usually released by the sarcoplasmic reticulum upon impulse from the inverted nerve.
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Answer:
2) End Triassic
Explanation:
End Triassic extinction occurred 201 million years ago. It was caused by the rifting of super continent Pangea. Pangea started to break and drift apart. When North america started to separate from Africa, volcanic activity increased. Lava and a large amount of gas was released into the atmosphere specially carbon dioxide. This led to global warming like condition which ultimately caused extinction of a large number of species.
meteoroids I’m not sure if this is correct but I hope it helped
A cell wall known as cellouse.