Question

the liver acts to keep blood glucose at a relatively constant level. it takes up glucose from the blood when levels are too high, and releases glucose to the blood when levels are too low.
are these actions of the liver an example of homeostasis?
o yes, because homeostasis involves the maintenance of constant internal conditions
o yes, because homeostasis is the interaction between two separate organs or tissues, such as the liver and blood
o no, because homeostasis involves only positive feedback, not feedback inhibition
o no, because homeostasis involves only tissues and organs from the same organ system

Explanation:

Homeostasis is the maintenance of constant internal conditions (like blood glucose levels). The liver adjusts glucose in the blood to keep it stable, so this is homeostasis. Option A's reasoning matches this definition. Other options are incorrect: Option B misdefines homeostasis as interaction between two organs/tissues (it's about internal condition stability), Option C is wrong as homeostasis includes negative feedback (liver's action is negative feedback to regulate glucose), Option D is wrong as homeostasis isn't limited to same - organ - system tissues/origins and includes negative feedback.

Answer:

A. Yes, because homeostasis involves the maintenance of constant internal conditions