b i gotta write 20 words thats bs but i think its b
Answer:
ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation
Answer:
Answer is D - cAMP.
Explanation:
cAMP is a small molecule that functions as an intracellular signaling molecule - a second messenger. The first messenger would be the thing that activated the GPCR (e.g. a hormone). The GPCR is a signal transducer (converts extracellular signal to intracellular signal). Once activated, the GPCR activates adenylate cyclase which can be called a signal effector - it is an enzyme that produces cAMP.
After the power stroke, ADP is released<span>; however, the cross-bridge formed is still in place, and actin and myosin are bound together. </span>ATP can<span> then attach to myosin, which allows the cross-bridge cycle to start again and further </span>muscle contraction can occur<span> </span>