Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..
The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..
In this tutorial, the works of Carl Gustav Jung and Sigmund Freud are described. Both of them actively pursued the way h..
Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..
While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..