Homeostasis and Feedback Mechanisms Flashcards
What is Homeostasis?
It is the detection and the counteracting of a change. H & T construction
What is the first stage of homeostasis?
Detecting change
James B
What is homeostatis?
The way an organism maintains its internal environment in relation to its external environment. - Alex.P
define excretion
the process by which waste products are removed from the body- IS
What is a feedback mechanism?
An example of positive feedback loop is the onset of contractions in childbirth. When contraction begins, the hormone oxytocin is released into the body to stimulate further contractions. As for the negative feedback loop, an example is the regulation of blood glucose levels. If blood glucose levels continue to rise it may result in diabetes. In fact, there are many biologic processes that use negative feedback to maintain homeostasis or dynamic equilibrium. H & T construction
what happens when water concentration changes in our body
it creates osmotic pressure - IS
why is it so important to have water in the body
chemical reactions in the body require an aqueous (water filled) environment - IS
Why is it important to have water
chemical reactions in the body require aqueous environment
DEFINE OSMOSIS
movement of water molecules from high water concentration to low concentration through a selectively permeable membrane – no energy input needed
What are the 3 main parts in a feedback system for living organisms?
- receptors
- control centre
- effector
SM
What are the 3 main parts in a feedback system for living organisms?
- receptors
- control centre
- effector
