Problem
Patrick Patisserie, 70 years old, has moved to a new retirement home since he is unable to walk properly, and he is not too steady on his feet. He has been spending the last few years sitting on his lounge chair or on his bed. During his medical check-up, the GP notices a significant atrophy of his quadriceps muscles.
Address the levels of organization in the muscles in the case of Patrick, an elderly person with muscle leg atrophy.
Chemical Level
In relation to your chosen scenario, describe the normal function of one of the main molecules (e.g., a certain type of neurotransmitter, hormone, ion, or gas) in the cell above and explain how its levels are regulated to maintain homeostasis.