During exercise, energy demand in the muscle increases. which other body system directly provides for this demand

During the course of normal exercise,  the muscle system will utilize the glucose and glycogen to support the energy levels.

As a next step, the body dissolves the fat storage of the body to power up your muscles. This is called the beta-oxidation reaction

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d