Well I can't really answer how they work together to maintain homeostasis. But I can tell you that the muscular system helps the nervous system by protecting the nerves. And the nervous system returns the favor by sending messages to the muscles for muscle movement.
Cholesterol is the waxy substance found in the blood stream. Too much of it can cause diseases like Heart Disease, Diabetes, High Blood Pressure, etc.
People who have been drinking end to overestimate their ability t tolerate alcohol - c.
Indeed, this surge of confidence whilst drinking alchool has been often observed by many people and has also no doubt lead to many interesting encounters because of this overestimation.