Laszlo Vass, Ed.D. Version 42-0280-00-01
Lab RepoRt assistant
This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.
What is the purpose of this exercise?
Are there any safety concerns associated with this exercise? If so, list what they are and what precautions should be taken.
Exercise 1: Structures of the Skin
Before beginning, set up a data table similar to this Data Table 1. Fill in the names of the numbered structures.
(National Library of Medicine at http://nih.nlm.gov)
|Data Table 1: Structures of Skin | |Item |Name | |1. | Hair Shaft | |2. | Arrector Pili Muscle | |3. | Sebaceous Gland | |4. | Hair Follicle | |5. | Sweat Gland | |6. | Pacinian Corpuscle | |7. | Subcutis (Hypodermis) | |8. | Dermis | |9. | Epidermis | |10. | Sensory Nerve Ending | |11. | Dermal Papilla | |12. | Sweat Pore |
A. How does the skin tan when exposed to ultraviolet light?
Melanin provides protection to deeper cells from ultraviolet radiation. Melanin also allows the skin to tan
In response to ultraviolet radiation exposure.
B. Describe the functions of the epidermis.
The epidermis is the outermost layer of skin consisting of keratinized squamous epithelium. Functions
include: tanning of skin, sense of touch, waterproofing, and immunity protection.
C. Describe the functions of the sweat glands.
Sweat glands regulate body temperature and also release pheromones (generated from sex
D. Compare the structure of the epidermis to that of the dermis.
The dermis varies in thickness just like the epidermis and mirrors the epidermis being thicker on the palms
of the hands and soles of the feet and thinner on other areas of the body.
E. Fill in the following table by either inserting the name of the structure/cell or by giving its function(s):
|Structure/Cell |Function(s) | | Melanocytes |Makes a pigment for tanning | |Langerhans cells | Involved in immune response | | Merkel Cells |Found on nerve endings | |Stratum lucidum | Thin layer of flattened keratinocytes only found in thick skin | | Papillary Layer |The blood supply here provides radiational cooling for the body |...
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