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Ch. 46 - Chemical Signals in Animals
All textbooksFreeman 8th EditionCh. 46 - Chemical Signals in AnimalsProblem 15
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Chapter 45, Problem 15

Ecotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? In response to a visit by tourists, which penguins—habituated or non-habituated—would show a greater change in expression of genes for liver enzymes involved in converting amino acids to glucose? Explain.

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Hello everyone here we have a question asking which of the following hormones released by the adrenal gland allows the body to make energy more readily available from store nutrients by inducing the synthesis of liver enzymes that produce glucose from amino acid. And our first answer choice is adrenal cortical trophic hormone or a. C. Th A. C th is released by the pituitary gland, triggering the adrenal glands to produce cortisol. So A. Is incorrect. Bi algal cerone valdosta rhone is released by the adrenal cortex but it regulates water and electrolyte balance. So B is incorrect. Si Corta code trope in releasing hormone or CRH CRH is released by the hypothalamus and stimulates the anti military pituitary to release A. C. Th so C. Is incorrect and we have d cortisol. Cortisol is released by the adrenal glands and is the primary stress hormone. It increases glucose in the bloodstream and enhances brains the use of glucose. So it allows the body to make energy more readily available from stored nutrients and it induces the synthesis of liver enzymes that produce glucose from amino acids. So our answer here is the cortisol. Thank you for watching. Bye.
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Textbook Question

Ecotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? In what part(s) of a target cell would you expect to find corticosterone receptors?

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Textbook Question

Ecotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? If penguins in a colony are habituated to the presence of tourists, how would their corticosterone response to being visited by tourists compare to that of penguins in a colony not previously exposed to tourists?

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Textbook Question

Ecotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? Scientists tested the hypothesis that penguins habituated to tourists have a blunted stress response overall. They examined the corticosterone response of habituated and non-habituated penguins to another stressor—that of being captured and restrained for 30 minutes. They found that both habituated and non-habituated penguins secreted corticosterone in response to being captured and restrained, but that the level of corticosterone after 30 minutes differed between the groups. The results are shown here (* means P<0.05). Was the hypothesis supported? Explain.

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Textbook Question

Ecotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? Suggest at least two distinct physiological mechanisms that could be responsible for the difference in corticosterone response to a stressor in habituated and non-habituated penguins.

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