Senses: Taste, Smell and Vision

This week we learned about the senses: taste, smell and vision. Compared to earlier weeks there were a lot of new things we were not familiar with. We learned a lot of new things this week and also returned our first exercise. For example, we found it surprising that the cells related to taste, smell and vision had similar functions as neurons such as some kind of action potentials. In addition, it was interesting to learn how neurons participated in these functions. This broadened our understanding of the different functions and synapses in neurons we had already learned previously. 

However, there was so much new knowledge that we considered it hard to process. Nevertheless, some of the facts our course book provided were interesting and easy to memorize. We considered that this boosted our learning. One of the facts was, for example, that only 20% of all smells smell good to humans. Another fact was water-water surface refracts light than air-water surface. Therefore, using goggles underwater is necessary in order to see well. 

This week’s lecture and readings brought some questions to our mind. One of our questions was that if the picture is formed to the retina upside down where in the brain the picture is turned the right way? Is it known? Another question that came into our mind was how in detail do we have to learn these? Is there a reason why? Do we have to apply this knowledge later? This question came in our minds because the course book is much more detailed than the lectures. 

Posted by Lotta Pyykönen

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