Biology?? What is involved in homeostasis??

Question

Biology?? What is involved in homeostasis??

Answer 1

Homeostasis is the process by which negative feedback mechanisms bring physiological variables back to a normal set point.  That is, a variation from that set point causes a series of reactions to counteract that variation and move the system back to normal.  

Example 1:  Control of the pH of the blood.  When the carbon dioxide level of the blood rises, it causes the pH of the cerebrospinal fluid in the fourth ventricle of the brain to fall.  This fall in pH (increase in acidity) causes the pneumotaxic center neurons to increase the respiratory rate which increases the rate at which carbon dioxide is removed from the blood.  This in turn causes the pH of the blood to rise, causing the pH of the cerebrospinal fluid to rise, and decreasing the rate of respiration.

Other examples include control of the blood volume by thirst, control of internal temperature by sweating, control of the blood sugar level by the liver and endocrine pancreas.  

The concept of homeostasis was introduced by the pioneering physiologist Claude Bernard.

Answer 2

Homeostasis is the temperature regulation of the body. it involves the hypothalamus which is in the brain, detecting the temperature of the blood. if the blood temperature is low the brain will send signals round the body to trigger reactions which will help heat the body up- shivering, raised hair (goosebumps) when the blood is too hot the body triggers sweatting to reduce the body temperature. the hypothalamus continues to check the blood temperature and when it returns to normal the shivering/ raised hair, sweatting stops.

Hope this helps!