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Animals at the extremes: Hibernation and torpor
Hibernation is an ingenious adaptation that some animals employ to survive difficult conditions in winter. This free course, Animals at the extremes: Hibernation and torpor, examines the differences between hibernation and torpor, and discusses the characteristic signs of hibernation behaviour. It explores the triggers that bring on hibernation, and whether internal signals or external season cues are predominant. It also examines the physiological adaptations that occur in hibernating animals.
Course learning outcomes
After studying this course, you should be able to:
- define and use, or recognise definitions and applications of, each of the bold terms
- give definitions of the terms ‘hibernation’, ‘torpor’ and ‘adaptive hypothermia’, and the three physiological processes that underlie them
- give examples of the diversity of the major groups of mammals and birds that contain hibernating species
- describe the physiological changes occurring during entry to hibernation and at least three of the cues that may trigger entry
- present evidence to show that hibernating mammals and birds retain physiological control of their Tb.
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- Learning outcomes
- 1 Hibernation and torpor: An introduction
- 2 The nature and extent of hibernation and torpor in endotherms
- 3 Characteristics of hibernation behaviour
- 4 Physiological adaptations – molecules and cells
- 5 Physiological adaptations – respiration and energy provision
- 6 Control systems
- 6 Control systems
- 6.1 Introduction
- 6.2 The hypothalamus as central regulator
- 6.3 Metabolic regulation and the midbrain
- 6.4 Rapid-response genes and rhythmic neuronal activity
- 6.5 The neurotransmitters histamine and serotonin: a role for chemical signalling between neurons of the hypothalamus
- 6.6 Hormones and hibernation
- 6.7 Sleep, the brain and hibernation
- 6.8 Summary
- Course Questions
- Keep on learning
- Further reading
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About this free course
14 hours study
Level 2: Intermediate
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