Thursday, March 31, 2011


For a unicellular prokaryote (some bacterium for instance) it's easy to adapt to the changing environment because they only have one cell to take care of. For us eukaryotes it's a bit trickier because we have lots and lots of specialized cells and organs. That's when our senses get involved. We need information what's going on inside of our system and outside of our cells. That is one major key to survival. How vulnerable would you feel if all of your senses were switched off? See? I think you got my point why senses are so important.

We can sense many different types of things:
  • Mechanical energy (e.g. touch and pressure)
  • Electromagnetic radiation (portion of visible light)
  • Temperature (hotness and coldness)
  • Chemical substances (e.g. flavours, odours and metabolical products)
There are also some internal senses such as stretch receptors. The thing with receptors are that they can only sense the adequate (appropriate) form of energy for them. E.g. light for the receptors in the eye. This is so specialized that even a mechanical energy to the eye, a hit for example, is being sensed as light. That's why you see stars when you take damage. 

It could be useful if we had receptors to detect e.g. radioactive radiation or magnetic fields. Imagine the possibilities!


  1. Personally, I believe we have the ability to work into sensing the electromagnetic field. More as a pressure to our touch than a visible spectrum. It just takes some mental training.

  2. Interesting stuff. Check me out,

  3. Cory brings up an interesting point in his comment, i concur.

  4. Anything is possible, what we understand as a species is practically 0.000000001% of the universe.

    Everything in life gives of some form of magnetic fields so to tap into these we'd have to share more genetics with animals such as turtles or birds.
    (as you may know they use magnetic currents to navigate)

  5. Another great post. Pretty interesting stuff you got here. :)