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1. Joe cats cereal and toast for breakfast, and his blood glucose level goes up. Joe's pancreas releases the hormone insulin, which encourages glucose to enter body cells. Joe's blood glucose goes down. This is an example of: a) positive feedback| b) negative feedback Which organ system was helping to regulate glucose homeostasis? Pancreas

1. Joe cats cereal and toast for breakfast, and his blood glucose level goes up. Joe's pancreas releases the hormone insulin, which encourages glucose to enter body cells. Joe's blood glucose goes down. This is an example of: a) positive feedback| b) negative feedback Which organ system was helping to regulate glucose homeostasis? Pancreas

Human Anatomy & Physiology (11th Edition)
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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BIO 202: REVIEW OF HOMEOSTASIS & FEEDBACK MECHANISMS 1. Joe eats cereal and toast for breakfast, and his blood glucose level goes up. Joe's pancreas releases the hormone insulin, which encourages glucose to enter body cells. Joe's blood glucose goes down. This is an example of: a) positive feedback| b) negative feedback Which organ system was helping to regulate glucose homeostasis? Pancreas 2. Sally has a small paper cut that bleeds. Platelets begin to stick to the leaking part of the blood vessel. The platelets release a substance that attracts even more platelets to the damaged blood vessel. These additional platelets ALSO secrete substances that attract even MORE platelets. Finally the mass of platelets "plug" the hole in the blood vessel. This accumulation of platelets is an example of: a) positive feedback b) negative feedback 3. Harry is very hungry and prepares a large dinner. He takes several bites, and then is interrupted by a phone call. He eats several more bites, and then has to respond to a text message. While he is texting, food reaches his intestines, which secrete the hormone cholecystokinin (CCK), which travels in the blood to his hypothalamus to stimulate his satiety ('fullness') center. After about 20 minutes, Harry still hasn't finished all of his dinner, but he isn't hungry anymore. This is an example of: a) positive feedback b) negative feedback Which organ systems were helping to regulate appetite homeostasis? 4. Joan's blood has an increase in carbon dioxide content, which is detected by chemoreceptors in blood vessels leading to the brain. Her brain responds by sending an action potential down nerves that cause an increase in her respiratory rate. Joan starts breathing faster to exhale the excess carbon dioxide. This is an example of: a) positive feedback b) negative feedback Which organ system was helping to regulate carbon dioxide homeostasis? 5. Which two organ systems are primarily involved in the REGULATION of homeostasis? 6. Define homeostasis:
Transcribed Image Text:BIO 202: REVIEW OF HOMEOSTASIS & FEEDBACK MECHANISMS 1. Joe eats cereal and toast for breakfast, and his blood glucose level goes up. Joe's pancreas releases the hormone insulin, which encourages glucose to enter body cells. Joe's blood glucose goes down. This is an example of: a) positive feedback| b) negative feedback Which organ system was helping to regulate glucose homeostasis? Pancreas 2. Sally has a small paper cut that bleeds. Platelets begin to stick to the leaking part of the blood vessel. The platelets release a substance that attracts even more platelets to the damaged blood vessel. These additional platelets ALSO secrete substances that attract even MORE platelets. Finally the mass of platelets "plug" the hole in the blood vessel. This accumulation of platelets is an example of: a) positive feedback b) negative feedback 3. Harry is very hungry and prepares a large dinner. He takes several bites, and then is interrupted by a phone call. He eats several more bites, and then has to respond to a text message. While he is texting, food reaches his intestines, which secrete the hormone cholecystokinin (CCK), which travels in the blood to his hypothalamus to stimulate his satiety ('fullness') center. After about 20 minutes, Harry still hasn't finished all of his dinner, but he isn't hungry anymore. This is an example of: a) positive feedback b) negative feedback Which organ systems were helping to regulate appetite homeostasis? 4. Joan's blood has an increase in carbon dioxide content, which is detected by chemoreceptors in blood vessels leading to the brain. Her brain responds by sending an action potential down nerves that cause an increase in her respiratory rate. Joan starts breathing faster to exhale the excess carbon dioxide. This is an example of: a) positive feedback b) negative feedback Which organ system was helping to regulate carbon dioxide homeostasis? 5. Which two organ systems are primarily involved in the REGULATION of homeostasis? 6. Define homeostasis:
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