Chapter 2 homeostasis Flashcards
Define homeostasis
Homeostasis a state of relative constancy of the bodies normal internal environment
What are example of homeostasis
Body temperature
Regulation of blood carbon dioxide level
Regulation of blood glucose level
Explain the importance of homeostatic control mechanisms and the operation of negative and positive feedback loops
The devices for maintaining or restoring homeostasis by self- regulation through feedback control loops.
What are the basic compounds of control mechanisms
Sensor
Integrating
Effector
Feedback’
True or false
Is negative feedback inhibitory?
True
What are the levels of homeostatic control?
Intercellular control- cell level
Intrinsic control - Tissue and Organ level
Extrinsic control- outer or from the outside system
When will homeostasis mechanisms may not be efficient?
During infancy and early childhood
May lose their efficiency even more in advanced old age
In the body, positive feedback.
A. Decreases stability of the body’s internal environment.
B. Increases stability
a
Changing the set point
Not all individuals have the same set points
Example fever body change setpoint temporarily to fight infection
The relatively constant state Maintained by the body is known as
Homeostasis
The normal reading or rang is called
Set point
The processes for maintaining. Or restoring homeostasis are known as
Homeostasis control mechanisms
What term describe a signal traveling towards a particular enter or point reference
Afferent
Effectors can be described as ?
Organs that directly influence controlled physiological variables
Immune response to an infection or the formation of blood clots are
Positive feedback
