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PSY 350 - Week 3 - DQ 1 - Sensory Systems

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Sensory Systems
This week you were introduced to the sensory systems, which include the visual, auditory,
olfactory, taste, and the body senses. Evolution would suggest that each sensory system is of
significant importance to maintaining the human organism. For this discussion, imagine you
are a professor giving a lecture on the evolutionary importance of the sensory systems.
Prepare a summary of your argument. Identify which is the most important sensory system
for human survival. Your discussion should also indicate which system is the least important
from the perspective of the “survival of the fittest”. Your initial post should be a minimum of
250 words and utilize at least one peer-reviewed source that was published within the last
five years.
My tutorial includes two answers to this DQ and you should use any one of the two.
Don’t forget to rephrase (reword) it.
ANSWER 1
The sensory system is a part of nervous system consisting of sensory receptors that receive
stimuli from internal and external environments, neural pathways that conduct this
information to brain and parts of brain that processes this information. These sensory
perceptions are commonly known as for vision, taste, smell, touch and hearing.
What I believe is the most important part of the human sensory system would be touch.
Many of us humans already live without seeing and hearing. When we tend to catch a cold it
becomes hard to our sense of smell as well as our taste because our blood vessels become
swollen up which makes is are hard for those senses to work. So I do not believe that these
senses are the most important because if we cannot use them, we can still survive. When it
comes to our touch sense, it is very important because these type of sense can be used
throughout our body unlike the other senses. As a human our sense of touch will allow us to
communicate if other senses are unable to do so. This type of senses is call a substitute
because when any of the other senses are unable to do their job, the sense of touch can take
its place which will allow us to communicate.
The nerve endings in our skin can tell us if something is hot or cold. We can also feel if
something is hurting us. Our body has about twenty different types of nerve endings that all
send messages to our brain. The most common receptors are heat, cold, pain, and pressure or
touch receptors. Pain receptors are probably the most important for our safety because they
can protect us by warning our brain that our body is hurt. (Your Sense of Touch) The
experience of pain results from the activation of pain receptors in the peripheral nervous
system and the responses of cortical and subcortical structures in the brain to that activation.
(Wilson 2012)
Wilson, J. F. (2012). Introduction to biological psychology. San Diego, CA: Bridgepoint
Education, Inc.
Your Sense of Touch. www.library.thinkquest.org

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Sensory Systems This week you were introduced to the sensory systems, which include the visual, auditory, olfactory, taste, and the body senses. Evolution would suggest that each sensory system is of significant importance to maintaining the human organism. For this discussion, imagine you are a professor giving a lecture on the evolutionary importance of the sensory systems. Prepare a summary of your argument. Identify which is the most important sensory system for human survival. Your discussion should also indicate which system is the least important from the perspective of the “survival ...
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