17. Our body is tightly regulated to maintain an internal (core) temperature of 98.6 degrees F. Your body doesnot function properly if you get too hot or too cold, partially because protein enzymes get too "stiff" (coldtemperatures) or denatured (hot temperatures)." blood temperature rises too high, this is sensed by specialized neurons in the brain. They signal otherherve centers, which in turn send signals to'the blood vessels of the skin. As these blood vessels dilate,more blood flows close to the body surface and excess heat radiates from the body. If this is not enough toCool the body back to its set point, the brain activates sweating. Evaporation of sweat from the skin has astrong cooling effect, as we feel when we are sweaty and stand in front of a fan.In this example, the brain is a(n):a. receptorb. control centerC. effectorIn this example, the smooth muscle in blood vessels, or the sweat glands, are a(n):a. receptorb. control centerC. effector• This is an example ofa. a negative feedback loopb. a positive feedback looputonoOUs

The maintenance of temperature by the body includes sensing the external stimulus, processing the…

Answered: 17. Our body is tightly regulated to…

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter17: Energy Balance And Temperature Regulation

Section: Chapter Questions

Problem 5TAHL

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*our body is tightly regulated to maintain an internal (core) temperature of 98.6 degrees F. Your body does not function properly if you get too hot or too cold, partially because protein enzymes get too "stiff" (cold temperatures) or denatured (hot temperatures). If blood temperature rises too high, this is sensed by specialized neurons in the brain. They signal other herve centers, which in turn send signals toʻthe blood vessels of the skin. As these blood vessels dilate, more blood flows close to the body surface and excess heat radiates from the body. If this is not enough to cool the body back to its set point, the brain activates sweating. Evaporation of sweat from the skin has a strong cooling effect, as we feel when we are sweaty and stand in front of a fan. In this example, the brain is a(n): а. гесеptor b. control center nent C. effector eweet alands, are a(n):
7. Thermoregulation is a negative feedback control system in the body. Which of the following statements correctly explains how thermoregulation works? A. In hot temperatures, the body maintains homeostasis by activating the sweat glands to release heat, which cools your skin as it evaporates. B. When the body is hot the blood vessels under your skin get wider. This increases blood flow to your skin where it is cooler C. When the body is cold the blood vessels under your skin become narrower. This decreases blood flow to your skin, retaining heat near the warm inner body. D. All of the above.
8. Even though your internal body temperature stays around 37 degrees C, the temperature of your skin does change. Is the outside of your skin usually at a higher temperature or lower temperature than 37 degrees C? Is the opposite ever true? Explain why.
constrict The regulation of body temperature is an example of a(n) mechanism because an above-normal body temperature stimulates mechanisms to decrease it, while a below- normal temperature causes changes to bring it up. dilate Вook positive feedback Print The thermostat is located in the part of the brain called the blood vessels erences hypothalamus When the core body temperature falls below normal, the negative feedback of the skin constrict and then receive nerve impulses to induce shivering to generate heat. sweat glands skeletal muscles When the body temperature is higher than normal, the blood vessels of the skin and the nervous system activates to cool the body by evaporation. cerebellum Reset
DneostaSIS means maintaining a stable, approximately constant internal environment within an organism. O ose the external environment is constantly changing (temperature, chemicals, etc.), organisms must have a control system to detecting changes and responding to them.. Anything that must be maintained in the body within a normal range (the "set point") must have a control system. For example, body temperature, blood pressure, and blood glucose levels are all regulated. To cal Immmon ht 16. A homeostatic control mechanism consists of three parts. Fill in the blanks with the appropriate word for the analogy below. ast gool The variable or stimulus is the factor that is regulated (ex: room temperature / body temperature). A variable is like a teeter-totter. If it is perfectly balanced in the horizontal position, it is at the normal value called the ibeet (ex: 68° F/98.6° F). The (ex: thermometer / nerves in the skin) senses changes in the variable SC (temperature) and sends information…
Figure 16.2 When bacteria are destroyed by leukocytes, pyrogens are released into the blood. Pyrogens reset the body’s thermostat to a higher temperature, resulting in fever. How might pyrogens cause the body temperature to rise?
Figure 33.23 When bacteria are destroyed by leuckocytes, pyrogens are released into the blood. Pyrogens reset the body’s thermostat to a higher temperature, resulting in fever. How might pyrogens cause the body temperature to rise?
Endothermic animals can maintain consistent temperature conditions by generating, main- taining, and regulating their body heat. Under cold conditions, more body heat becomes lost to the environment. Endothermic ani- mals rely on different mechanisms that allow them to maintain their body heat. Which of the following mechanisms that occur in endothermic animals does not describe a mechanism by which they maintain their body heat under these types of conditions? A B с D Some endothermic animals hibernate during extreme environmental conditions, which decreases the rate of metabolic reaction and decreases heat loss. The tissues of the blood vessels of many endothermic animals can dilate and move closer to the skin, allowing for heat to move more readily into the environment. Shivering, which can occur involuntarily in most endothermic animals, produces rapid muscle contractions, which increase the rate of cellular respiration and thereby increase heat production. Layers of densely packed…
it is a warm day and you feel a little chilly, on checking your temperature, you find that your body temperature is 1.5 degree below normal, suggest possible reasons for this situation. Describe briefly how your body will react to this dip in temperature.
Figure (2) below, shows the relations between all factors that should be at minimat amount of body regulation to achieve thermal equilibrium, towards establishing the physiological basis of comfort. in the same Figure, symbol (B) represents: Celius 20 25 700 600 130 300 100 100 00 70 AMBIENT TEMPERATUREF 100 110 Figure (2) ORadiation O Convection OMetabolism Evaporation STUK BOOYLOSssor GAIN
One major aspect of animal life is the need to move as part of capturing food. One slight difficulty in this effort, however, is that the complex machinery required to make movement possible requires proteins maintained as specific temperature I choose one protein unique to animals you think is particularly important and do some research on what temperatures it can operate at Report the results here about it's response to temperature For one animal that uses that protein from part 1-what temperature range might they experience and is it possible the protein might leave it's optimal range (e.g.) might a fish using said protein experience a large enough shift in environmental temperature to interfere with the protein functioning)? Under what circumstances might it experience this if true what strategy does the animal from part 2 use to make sure the proteins it requires stay at their optimal temperature? (How does your animal thermoregulate?)
Body temperature is homeostatically regulated around a set point. Given your knowledge of negative feedback and homeostatic control systems, predict whether narrowing or widening of the blood vessels of the skin will occur when a person exercises strenuously. (Hints: Muscle contraction generates heat. Narrowing of the vessels supplying an organ decreases blood flow through the organ, whereas vessel widening increases blood flow through the organ. The more warm blood flowing through the skin, the greater is the loss

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