Assignment: Effect of Vascularity on Skin Temperature Recovery Lab Report

Assignment: Effect of Vascularity on Skin Temperature Recovery Lab Report

Homeostasis refers to the body’s ability to maintain internal conditions within a certain range
Many of the body’s chemical reactions have to take place at this temperature, regardless of the temperature outside the body
The human skin is designed to detect changes in temperature and respond to them by its complicated structure
The dermis of the skin either allows or prevents blood flow to the surface of the skin
Skin with more blood vessels at its surface (vascularity) will return to the set point more quickly after a temperature change

3 Homeostasis in Body Temperature
What is normal body temperature?
Many of the body’s chemical reactions have to take place at this temperature, regardless of the temperature outside the body
The human skin is designed to detect changes in temperature and respond to them by its complicated structure

4 Side View of the Skin
Figure 1

5 Homeostasis in Body Temperature
The dermis of the skin either allows or prevents blood flow to the surface of the skin
Arteries constrict if it is cool to slow down blood flow
Arteries dilate if it is hot to increase blood flow; this produces a red, flushed appearance

6 Skin Temperature What is normal skin temperature?
This is the set point of the skin
Skin with more blood vessels at its surface (vascularity) will return to the set point more quickly after a temperature change

7 What you will do?
You will compare the rate of recovery from cold in two different skin regions and draw conclusions about the vascularity of these areas.

Read the lab, analyze the data, answer the data analysis questions, and upload the file to Canvas. Homeostasis refers to the body’s ability to maintain internal conditions (e.g., temperature, pH, hydration) within the narrow limits that are optimal for the continuation of metabolic processes. When these optimal conditions are disturbed by a change in the environment, body systems work to return them to normal. Many of the chemical reactions and cellular processes necessary to sustain human life occur most readily at a body temperature of approximately 37.0°C (98.6°F). Homeostatic mechanisms work to maintain this temperature, regardless of changes in the external environment. Changes in temperature are sensed by the skin, which is well-designed to counteract these changes. Beneath the protective epidermal layer of the skin lies the dermis, which contains sweat and oil glands and a rich blood supply (see Figure 1). The dermal tissues influence body temperature by either allowing or diverting the blood’s access to the surface of the skin. When an area is exposed to the cold, small arterioles in the dermis constrict, allowing less than normal blood flow to that area and protecting core body temperature.

When cold is removed, the blood supply to the skin increases again as the arterioles dilate. Exposure to heat causes blood vessels to dilate, allowing heat to dissipate from the skin’s surface, and resulting in a flushed or red appearance. Other examples of the regulation of body temperature through the action of the skin’s blood supply include the dilatation seen with embarrassment and the constriction and resulting paleness that occurs with fear. Dilatation also occurs with ingestion of alcohol. Human skin temperature is maintained at approximately 33°C (91°F). This temperature can be referred to as the skin temperature “set point.” Regions of skin with higher vascularity (containing more blood vessels) will return more quickly to the set point after a disturbance than regions with less vascularity. In this experiment, you will compare the rate of recovery from cold in two different skin regions and draw conclusions about the vascularity of these areas. Figure 1 Human Physiology with Vernier 2-1 Computer 2 OBJECTIVES In this experiment, you will • Compare the rate of recovery from cold in two different skin regions.

Important information for writing discussion questions and participation

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Hello class and welcome to the class and I will be your instructor for this course. This is a -week course and requires a lot of time commitment, organization, and a high level of dedication. Please use the class syllabus to guide you through all the assignments required for the course. I have also attached the classroom policies to this announcement to know your expectations for this course. Please review this document carefully and ask me any questions if you do. You could email me at any time or send me a message via the “message” icon in halo if you need to contact me. I check my email regularly, so you should get a response within 24 hours. If you have not heard from me within 24 hours and need to contact me urgently, please send a follow up text to

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Plagiarism is highly prohibited. Please ensure you are citing your sources correctly using APA 7th edition. All assignments including discussion posts should be formatted in APA with the appropriate spacing, font, margin, and indents. Any papers not well formatted would be returned back to you, hence, I advise you review APA formatting style. I have attached a sample paper in APA format and will also post sample discussion responses in subsequent announcements.

Your initial discussion post should be a minimum of 200 words and response posts should be a minimum of 150 words. Be advised that I grade based on quality and not necessarily the number of words you post. A minimum of TWO references should be used for your initial post. For your response post, you do not need references as personal experiences would count as response posts. If you however cite anything from the literature for your response post, it is required that you cite your reference. You should include a minimum of THREE references for papers in this course. Please note that references should be no more than 5 years old except recommended as a resource for the class. Furthermore, for each discussion board question, you need ONE initial substantive response and TWO substantive responses to either your classmates or your instructor for a total of THREE responses. There are TWO discussion questions each week, hence, you need a total minimum of SIX discussion posts for each week. I usually post a discussion question each week. You could also respond to these as it would count towards your required SIX discussion posts for the week.

I understand this is a lot of information to cover in 5 weeks, however, the Bible says in Philippians 4:13 that we can do all things through Christ that strengthens us. Even in times like this, we are encouraged by God’s word that we have that ability in us to succeed with His strength. I pray that each and every one of you receives strength for this course and life generally as we navigate through this pandemic that is shaking our world today. Relax and enjoy the course!

Hi Class,

Please read through the following information on writing a Discussion question response and participation posts.

Contact me if you have any questions.

Important information on Writing a Discussion Question

• Your response needs to be a minimum of 150 words (not including your list of references)
• There needs to be at least TWO references with ONE being a peer reviewed professional journal article.
• Include in-text citations in your response
• Do not include quotes—instead summarize and paraphrase the information
• Follow APA-7th edition
• Points will be deducted if the above is not followed

Participation –replies to your classmates or instructor

• A minimum of 6 responses per week, on at least 3 days of the week.
• Each response needs at least ONE reference with citations—best if it is a peer reviewed journal article
• Each response needs to be at least 75 words in length (does not include your list of references)
• Responses need to be substantive by bringing information to the discussion or further enhance the discussion. Responses of “I agree” or “great post” does not count for the word count.
• Follow APA 7th edition
• Points will be deducted if the above is not followed

• Remember to use and follow APA-7th edition for all weekly assignments, discussion questions, and participation points.
• Here are some helpful links
• The is a great resource