Adaptations-of-Organisms - 3. Physiological adaptations

Physiological adaptations

What is to be learned	Activities
Organisms can tolerate a range of normal conditions Normal range for tolerance Imortance of maintaining a relatively constant internal environment The factors that can contribute to the failure of homeostasis The negative feedback mechanism An example of what will happen in extreme cases when the normal range is exceeded	Go to the Control, regulation and feedback website and work through the introduction, animation, feedback and quiz.
Nerve control is used in complex organisms Parts of the nervous system To be able to distinguish between a nerve, neurone and nerve fibre To be able to summarise the different links of neurones To be able to distinguish between motor functions and visceral functions Receptors ability to detect stimuli	Watch the YouTube video on the nervous systemthen play the nervous system game
Hormone control is used in organisms To learn about the endocrine system To learn about the major endocrine glands, the hormones they secrete and the function of the hormones as related to homeostatis To be able to compare the hormonal and nervous systems	Complete pages 1 to 10 from the Hormones and their Effects website
Organisms can regulate their water balance and control their temperature To learn the difference between endotherms and ectotherms To learn the definitions for homeothermic and poikilothermic	Watch the YouTube video on disecting a kidney then Examine the differences between endotherms and ectotherms