17. 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). " blood temperature rises too high, this is sensed by specialized neurons in the brain. They signal other herve 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 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): a. receptor b. control center C. effector In this example, the smooth muscle in blood vessels, or the sweat glands, are a(n): a. receptor b. control center C. effector • This is an example of a. a negative feedback loop b. a positive feedback loop utonoOUs

17. 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). " blood temperature rises too high, this is sensed by specialized neurons in the brain. They signal other herve 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 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): a. receptor b. control center C. effector In this example, the smooth muscle in blood vessels, or the sweat glands, are a(n): a. receptor b. control center C. effector • This is an example of a. a negative feedback loop b. a positive feedback loop utonoOUs

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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A. MUCUS AND CILIA IN TRACHEA B. INFLAMMATION G. PLASMA CELLS H. NATURAL KILLER CELLS C. ANTIGENS D. ANTIBODIES I. LYSOZYME J. MACROPHAGE K. MEMORY CELLS L. REGULATORY T CELLS E. KILLERT CELLS F. HELPERT CELLS 1. Identifying markers in the cell membranes of body cells. 2. Cell that produces antibodies as part of the specific defense mechanism. 3. Cell that produces the protein perforin Part of the nonspecific defenses that causes redness, increased temperature, and swelling. 4. 5. Cell that stops the immune response when the infection is under control. 6. sigr Part of the barrier defenses of the immune system. Recognizes previous antigens so that the immune response will be much faster in case of a second infection. 7. 8. Surrounds and destroys foreign antigens as part of the nonspecific defenses. (recall) Fill in the blank with the most appropriate term. 9. Lack of this mineral can decrease oxygen transport. 10. Oxygen transport protein. 11. Diastolic pressure is >90 is a symptom of…
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When your white blood cells encounter pathogens, they use harsh chemical reactions to destroy pathogens. During these chemical reactions, some harmful compounds called free radicals are generated. Free radicals are important for destroying pathogens, but if they accumulate in our cells, they can cause damage to our own cells, too. They can damage our DNA and proteins within our cells. How is vitamin C involved in these immune processes? Which ONE is correct? 1 Vitamin C is a coenzyme in the chemical reactions that produce free radicals. 2 Vitamin C is an antioxidant that prevents free radicals from damaging cellular components. 3 Vitamin C assists in the formation of collagen, which destroys pathogens. 4 Vitamin C assists in the synthesis of phospholipids to repair damaged cell membranes.
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