It is controlled by negative feedback loop.Let's say you have high glucose level in your blood,that will be registered and pancreas will produce more insulin to keep it in the normal range.Therefore by negative feedback loop it will regulate homeostasis
It is like a animal migrating because it is like hibernating because it doesn't get any food or water in winter.
A population of organisms must exist. There must be variation among the members of the population. There must be a mechanism by which some members of the population can produce more offspring than other members. There must be a mechanism by which the variation among members of the population is passed on to their offspring.
A dietician will closely monitor sugar levels in a diabetes patient AKA glucose (sugar). Glucose is a carbohydrate.
