Homeostasis
A process of maintaining constant internal environment in physiological limit
The environment surrounding
cells, tissues, and organs
- Affected by physical factors (temperature,
blood pressure) and chemical factors (glucose in blood,
blood pH)
- These factors usually maintain at a balanced level and
controlled closely by homeostatic mechanism:-
- Osmoregulations
- Excretion
- Blood Glucose Levels
Excretion: The removal of waste products, which would become toxic if allowed
to remain in the body
Osmoregulation: The control of the water balance in the body
Why homeostasis is important?
To balance internal environment at its steady state so that, the biochemical
process in body can proceed at an optimum rate
Basic components of a feedback system
Receptor/Detector Control Center Effector
Afferent Efferent
Neuron Neuron
Sensors detect
external stimuli
and internal
condition Analyse and Interpret Body’s responses to
stimuli
Homeostatic Control System
It detect changes in the internal environment and
Receptor/Detector transmit an input/stimulus/information in the form of
nerve impulses or chemical signals to a control centre
via afferent neutron
It controls the input/stimulus/information to stimulate
Control Center the action that will correct the changes and transmit
the output to effector via efferent neutron
It carries out the information of corrective mechanism
Effector action via negative feedback mechanism to restore
condition back to normal
A process of maintaining constant internal environment in physiological limit
The environment surrounding
cells, tissues, and organs
- Affected by physical factors (temperature,
blood pressure) and chemical factors (glucose in blood,
blood pH)
- These factors usually maintain at a balanced level and
controlled closely by homeostatic mechanism:-
- Osmoregulations
- Excretion
- Blood Glucose Levels
Excretion: The removal of waste products, which would become toxic if allowed
to remain in the body
Osmoregulation: The control of the water balance in the body
Why homeostasis is important?
To balance internal environment at its steady state so that, the biochemical
process in body can proceed at an optimum rate
Basic components of a feedback system
Receptor/Detector Control Center Effector
Afferent Efferent
Neuron Neuron
Sensors detect
external stimuli
and internal
condition Analyse and Interpret Body’s responses to
stimuli
Homeostatic Control System
It detect changes in the internal environment and
Receptor/Detector transmit an input/stimulus/information in the form of
nerve impulses or chemical signals to a control centre
via afferent neutron
It controls the input/stimulus/information to stimulate
Control Center the action that will correct the changes and transmit
the output to effector via efferent neutron
It carries out the information of corrective mechanism
Effector action via negative feedback mechanism to restore
condition back to normal
