Essay on Reflex and Special Senses

2732 Words Sep 22nd, 2012 11 Pages
Name: Stephanie Frost Section: Bio 201

Lab Report: Reflex and Special Senses

Please fill out this report and submit it to the dropbox. Do not hand in your own form. It will not be graded and you will receive a zero for the lab.

You must get all parts correct to get credit for the question * Please note that although you do not hand in items in observations, it is very important to do these as you may see some of these items on future/associated lab quizzes or be asked about some of these concepts on unit assignments.*

Activity 1: Stretch Reflexes

QUESTIONS:

A. Which muscles
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http://faculty.stcc.edu/AandP/AP/AP1pages/nervssys/unit12/reflexes.htm

Activity 3: Cranial Nerve Reflexes

QUESTIONS:
A. What is the function of the corneal reflex? The corneal reflex allows an objective assessment of facial sensation. The afferent limb is V1 of the trigeminal nerve, the efferent limb is the facial or 7th cranial nerve. http://www.utoronto.ca/neuronotes/NeuroExam/cranial_5b.htm The corneal reflex test (blink test) examines the reflex pathway involving cranial nerves V and VII. http://academiclifeinem.blogspot.com/2011/04/trick-of-trade-corneal-reflex-test.html

B. Why do we have a gag reflex? A gag reflex is defined as a reflex contraction of the muscles of the throat caused especially by stimulation (as by touch) of the pharynx.1. It, along with other aero digestive reflexes such as reflexive pharyngeal swallowing, prevents something from entering the throat except as part of normal swallowing and helps prevent choking.2

1. http://www.merriam-webster.com/medical/gag%20reflex
2. http://en.wikipedia.org/wiki/Pharyngeal_reflex
Are there individuals who do not have this reflex? One in three people lack a gag reflex. http://en.wikipedia.org/wiki/Pharyngeal_reflex

Activity 4: Sheep Eye Dissection

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