Homeostasis Flashcards
the maintenance of internal environment within range suitable for cell activities.
Homeostasis
is the environment that surrounds the cell. It is
the extracellular fluid (ECF) and is composed of the interstitial fluid
and plasma.
The internal environment
conditions of the ECF are continually being disrupted by
by external stimuli, such as heat, cold, lack of oxygen, pathogens, toxins and internal stimuli, such as body temperature, blood pressure and concentration of water, glucose, salts, oxygen, etc.
The loss of homeostasis typically results in
sickness or even death!
. The processes and
activities that help to maintain homeostasis are referred to as
as homeostatic
mechanisms
This is a body part that can sense change. The change is called a stimulus. A stimulus is anything in the environment that can cause a response.
Receptor:
Thisis the body part that receives the information from the receptor and then tells the body how to respond to the change. (The control center is usually either the CNS or endocrine organs).
. Control center (also called integration center)
: This is the part that responds to the commands of the control center. The activity of the effector has an effect upon the stimulus. Effectors include muscles and glands in the body
Effector:
In order for the body to maintain homeostasis, there are three components in the body that have to work together. These 3 components are:
Receptor Control center (also called integration center and Effector:
What is used in the body to maintain homeostasis
Feedback
There are 2 types of Feedback which are
Negative feedback and Positive feedback