* Resting muscles primarily use fatty acids as their energy source. This is because fatty acids are more energy-dense than glucose and can be stored in greater quantities.
* Glucose is still used by resting muscles, but to a lesser extent. It's mainly used for maintaining essential functions like:
* Maintaining blood glucose levels: Muscles can take up glucose from the bloodstream and store it as glycogen.
* Protein synthesis: Glucose is needed for building and repairing muscle tissue.
* Other cellular processes: Glucose is a key component of many cellular processes, like providing energy for ion pumps.
In summary: While resting skeletal muscles can use glucose, their preferred energy source is fatty acids. Glucose plays a crucial role in maintaining blood glucose levels, protein synthesis, and other essential cellular functions.
