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Showing posts from April 30, 2019

Homeostasis and Complexity

Biomolecules such as RNA,DNA,amino acids etc, arose in a sea of interacting molecules in a  primordial soup. This was followed by compartmentalization to separate out the biomolecules from their environment. This resulted in homeostasis i.e. regulated exchange of matter between systems and surroundings.

According to wikipedia- "In biology, homeostasis is the state of steady internal physical and chemical conditions maintained by living systems.[1] This dynamic state of equilibrium is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range). Other variables include the pH of extracellular fluid, the concentrations of sodiumpotassium and calciumions, as well as that of the blood sugar level, and these need to be regulated despite changes in the environment, diet, or level of activity."
Why did complexity arise then ? To provide more and more regula…

Homeostasis

Yesterday I heard Dr.  Damasio on the mindscape podcast hosted by Prof. Sean Carroll.
https://www.preposterousuniverse.com/podcast/2019/04/29/episode-44-antonio-damasio-on-feelings-thoughts-and-the-evolution-of-humanity/

 It was a fascinating, insightful conversation.

The observation that "feelings" drive culture was new to me. From experience, I can say that feelings, along with thought do drive my choices.

Affect i.e. emotions and feelings play an important role in shaping societies. The hypothesis drawn  is that , homeostasis is a necessary pre-requisite to maintaining life , and homeostatic mechanisms result in feelings as adaptations to the environment.

Nervous systems could have evolved to regulate homeostasis. This is a strong argument from the evolutionary biology point of view, because the questions being asked today are-what are the environmental selection pressures that drive evolution.

Exchange of substances occur between the living organism and the environment t…