Tuesday, May 10, 2016

Reflex Lab

1. In this lab we looked at the many different reflexes. This includes the physical observation of how our bodies react to certain stimuli, as well as figuring out the different receptors and processes going on during a reflex. A reflex is an almost instantaneous response to a stimuli. The impulse only travels to the spinal cord and back to the muscle instead of going all the way to the brain as it takes less time.

2. 
  1. The photopupillary reflex is one that is designed to protect our eyes. It will result in our pupils dilating or constricting in response to a change of light in the environment. This did occur when we tested the reflex by shining a flashlight in the participants eye. The pupils constricted almost instantly. 
  2. The knee jerk reflex may be one designed to fend off danger in our early evolutionary development. What will happen is the leg will kick forward when the knee is bumped. When we tried this on the participant we saw that this actually happened. 
  3. The blink reflex is also designed to protect our eyes from physical danger. Our eyes will blink if something is thrown at us. When we experimented this we saw that the participants eyes almost always blinked even though they knew they were safe. 
  4. The plantar reflex may be one designed to protect our feet from any danger. The feet curl up and tense if there is pressure on the sole of ones feet. 
  5. Finally the reaction time part tested our reaction time to certain stimuli. Here we see the time it takes for the brain to process what happens and react, with and without distraction. When we did the reaction time experiment we saw that texting drastically increased the time it takes for reaction. In my data there was almost a .05 increase in reaction time from .19 seconds to .24 seconds. 


Here you can see me carrying out the reaction time experiment 


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