It occurs in many mammals besides humans; a prominent example is porcupines, which raise their quills when threatened
Answer:
Hiya there!
Explanation:
ATP then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site. ATP can then attach to myosin, which allows the cross-bridge cycle to start again; further muscle contraction can occur.
acetylcholine
: Skeletal muscle contraction and changes with exercise. (A) Neurotransmitter (acetylcholine, ACh) released from nerve endings binds to receptors (AChRs) on the muscle surface.
The muscle contraction cycle is triggered by calcium ions binding to the protein complex troponin, exposing the active-binding sites on the actin. As soon as the actin-binding sites are uncovered, the high-energy myosin head bridges the gap, forming a cross-bridge.
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Hope this <em><u>Helped!</u></em> :D
the answer is B) hope this helps
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Answer:
Botany, zoology, and microbiology.
Explanation:
It would have a decrease in the numbers of animals because the food chain would be thrown off
