Name: Date: 14. The General Senses A. General Receptors I. Complete the followin
ID: 3518144 • Letter: N
Question
Name: Date: 14. The General Senses A. General Receptors I. Complete the following table using information from chapter on the skin and sensory receptors in the textbook and from the models. Receptor Location Sensatiorn Free nerve endings Root hair plexus Tactile/Merkel disc Lamellated/Pacinian corpuscles Tactile/Meissner's corpuscles B. Sensory testing - Two-point discrimination 1. Record your observations on two point discrimination in the table below n the bodyMinimum difference at which two separate points of stimulation are perceived (mm) Forearm Back of neck Palm of hand Upper arm Which area of the body had the largest receptive field? Which area of the body had the smallest receptive field? Larger the receptive field (more/less) sensitive is the skin. (more/less) sensitive is the skin. Smaller the receptive field, 153Explanation / Answer
A 1 RECEPTOR LOCATION SENSATION
* Free nerve ending Skin Pain
* Root hair plexus Around hair follicles Mechanoreceptors for touch
sensation
* Tactile/Merkel disc Basal epidermis of the skin Pressure
* Lamellated/ Pacinian Skin Vibration and pressure
corpuscles
* Tactile/Meisner,s Skin Superficial light touch
corpuscles
B LOCATION ON THE BODY TWO POINT DISCRIMINATION
* Forearms 3 -- 4 mm[ it depends on the length of the forearm ]
* Back of neck 36 to 75 mm
* Palm of hand 1 mm
*Upper arm 3 -- 4 mm [ this also depends on the length
of the upper arm ]
* The back of the neck had the largest receptive field .
* The palm of the hand had the smallest receptive field .
* Larger the receptive field , less sensitive is the skin.
* Smaller the receptive field , more sensitive is the skin.
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