homeostatic control & negative feedback

What is homeostasis?

The maintenance of a constant internal environment within a living organism irrespective of the external conditions

why is homeostasis important

So cells of the body can function efficiently, regardless of fluctuations in conditions of external environment

3 examples of homeostatic control

Regulation of blood glucose levels , core body temperature and PH & solute potential

What does homeostasis use to return the body to the ‘set point’

Negative feedback

What is the set point determined by

A control centre

What are deviations from the set point corrected by

Negative feedback

What does negative feedback back use

Detector/receptor

What do detectors receptors do

Monitors the condition and provides input to the control centre

What does the control centre do

Evaluates the information and provides and output to the effector

What does the effector do

Makes a response designed to take away the deviation

explain process of negative feedback

receptor detects any deviation from the set point, information is sent to a control centre which coordinates a response to return levels back to the set point

What do some systems in the body operate by

Positive feedback

What happens in positive feedback?

The effector increases change

Example of positive feedback ?

When skin is cut, the first stage if clotting is that platelets adhere to the cut surface, they secrete signaling molecules which attract more platelets to the site