3. Explain the negative feedback control of body temperature using thermoreceptors, the hypothalamus, and the temperature control center. Thermoreceptors detect changes in temperature 4. How is homeostasis maintained under heat stress? (Include heat-losing center, capillary dilation, and sweat production.) 5. How is homeostasis maintained under cold stress? (include: heat-producing center, capillary constriction, shivering) A
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- 1. What are the organs involved in maintianing constant temperature in the body? 2. How does the body maintain its internal temperature? 3. If the temperature dropped below tolerable levels, how would the body react? 4. What could have happened if the temperature either increased or decreased beyond tolerable levels?1. List and explain three activities that can influence body temperature reading. 2. List two different parts of the body where an infrared thermometer may be used for temperature measurement and describe how an infrared thermometer works.State the reason why: 1. The rise in the body temperature due to increased humidity in the surrounding environment acts as the stimulus that is input to the receptor. 2. The nerve cells of the skin and the brain are involved in perceiving the change or rise in body temperature and thus act as receptors of the stimulus. 3. The hypothalamus acts as the temperature control center of the body. It receives input from the receptors and causes the blood vessels to dilate, thereby activating the effector.
- 1. List and explain three activities that can influence body temperature reading. 2. List two different parts of the body where an infrared thermometer may be used for temperature measurement and describe how an infrared thermometer works.3. Which thermometer may be hazardous to health and the environment?1. Octavius has been working outside all day under a scorching sun. As his body temperature climbs, his sweat glands release more and more sweat, releasing more heat. The release of heat and the effect of sweat on the skin cools the body back down. The temperature regulating organ is the hypothalamus and it controls the body’s response to increases and decreases in body temperature. a. What is the stimulus?b. What is the control center?c. Identify the control center’s response to the stimuli?d. Does the response stop/reverse the stimuli or enhance the stimuli?e. Is the body’s response a negative or positive feedback?43. In the process of regulating body temperature, which part of the feedback system includes the sweat producing glands? Group of answer choices control center receptors stimulus effectors
- 1. what would happen to the temperature of the blood if the feedback was positive rather than negative. 2. Cutting the nerves connecting the thermoreceptors to the heat loss centre in the hypothalamus might cause the death of the individual. explain precisely why this action might cause death. 3. Cutting the nerves connecting the heat loss centre to the skin would be less likely to cause death than if those between the thermoreceptors and the heat loss centre were cut. Suggest why. 4. Negative feedback in temperature regulation occurs as a result of blood passing from the skin to the brain. In doing so, this blood passes through the heart. List, in sequence, the major vessels joined to the heart that this blood would pass through on its journey.Heat exchange with the environment depends on the surface area-to-volume ratio of the body. Assuming that the body shape of an animal is at least somewhat spherical, a considerable decrease in body size would the surface area-to-volume ratio, and the ability to exchange heat with the environment would A. increase; increase B. increase; stay about the same C. increase; decrease D. decrease; increase E. decrease; stay about the same6. Since January 2018, Isaac has lost a problematic amount of weight and is underweight for his age. He runs 10 miles and consumes roughly 650 calories daily, but perceives himself to be overweight. Despite his family’s concerns, Isaac refuses to stop exercising in fear of gaining weight. Along with losing a large amount of body weight, he has begun to experience lanugo (baby-like hair) on his skin and has been much more sensitive to cold temperatures. Which of the following is the most likely diagnosis? Bulimia Nervosa Unspecified Feeding or Eating Disorder Anorexia Nervosa – Binge Eating/Purging type Anorexia Nervosa - Restricting type
- 6. If left untreated, an iron deficiency would eventually lead to decreased performance by each of the following except... Group of answer choices increasing susceptibility to infection. osteoporosis. reducing oxygen delivery. All of the options are correct. 7. The primary source of heat loss during exercise is... Group of answer choices convection. conduction. evaporation. radiation. 8. Primary adaptations to heat acclimatization include the following, except... Group of answer choices Increased plasma volume Reduced loss of NaCl in sweat Increased skin blood flow Increased sweat rate 9. Which of the following minerals would not be helpful in preventing a common cold? Group of answer choices Magnesium Selenium Zinc Copper1. Explain the physiologic processes involved in homeostatic regulation of temperature, pulse, respirations, and blood pressure.When we exercise in the cold, we will regulate body heat through all except... Vasodilation to extremities Vasoconstriction to extremities Increased epinephrine output Shivering