Assignment S Assignment 5- Temperature Homeostasis Out in the Cold Imagine that

Question

Assignment S Assignment 5- Temperature Homeostasis Out in the Cold Imagine that you are a leading scientist of a research and development' team working on the development of thermoregulatory apparel for long-distance athletes. Below are questions designed to focus the development and testing of your product below. ee 'Memorandum from the director of the project Memorandun Date: 7/3 To: Thermoregulatory Apparel Research & Development Group From: Daniel Jung (Project Head) Sorry that I will not be at our meeting next Monday (July 16)-I will be at the American College of Sports Medicine meeting in Baltimore. While there I hope to talk with the director of the "Human Performance Laboratory' at the University of Colorado about utilizing their facilities in the testing of our products. In the meantime, I think we need to get started answering some basic questions that will help us in our selection of materials and overall design of the product. Please go ahead and working on the attached 'focusing questions' (see questions 1-3 below). While all the questions may not directly pertain to human biology, answering these more universal questions may guide the development and testing of our product Best, Daniel Daniel Jung, Ph.D. Acme Athletic Apparel

Explanation / Answer

Negative feedback in general functions in such a way that whenever a change occurs in the system, this automatically causes a corrective mechanism in an opposite direction, which reverses the change and brings the system back towards the set point i.e. to normal. Therefore, when a human is dipped in cold water (at 500 F), the negative feedback loop governing thermoregulation starts working in the opposite direction i.e. towards raising and conserving the temperature of the body. The negative feedback loop gets activated by the stimulus created by thermoreceptors in the hypothalamus. The negative feedback loop then responds in two ways-(a) Conserve the temperature of body by constricting skin blood vessels. This diverts blood from skin to deeper tissues and reduces the heat loss from skin surface. (b) Generates heat by activating skeletal muscles to trigger shivering which generates more heat.

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