Y12 ATAR Biology students explore mechanisms of homeostasis in animals at Perth Zoo

On 17 June, the Y12 ATAR Biology class travelled to Perth Zoo to conduct a practical investigation of the structural features, behavioural responses and physiological mechanisms that help animals maintain a relatively constant internal environment (i.e. homeostasis).  Students took part in a formal presentation where they looked at the stimulus-response model, and explored the regulation of temperature, utilisation of water, production of nitrogenous waste, as well as the concentration of salts and gases.  They also got up close and personal with an ectotherm, when the presenter brought out a Woma Python (Aspidites ramsayi) for them to observe and (for the brave!) actually touch.

Following the presentation, the students surveyed a range of animals at the Zoo – including little penguins, elephants, kangaroos and various reptile species – and evaluated the structures and behaviours that each animal displayed to support temperature and water balance.  Overall, it was a fantastic opportunity to 'bring Biology class to life' by spending some time with a diverse group of organisms from a range of different habitats.

Here are a few reflections on the day, as written by some of the Biologists:

'It was amazing to go in and observe the animals while actually knowing WHY they do a lot of the things that they do, it really changed my perspective!' -  Ashleigh Adam

'I really loved being at the Zoo.  The activities were really relevant to the syllabus, and it was a nice break to be walking through the trees and observing the animals on a fine day' - Faith Pollard-Chambers

'It was a fascinating day, with lots of cute animals and informative sessions.  Something that summarises my thoughts about the day:  If we don't indulge ourselves in the knowledge of the species we share our spaces with, how will be truly appreciate what we have?' - Tia Hayton-Smith

'Being able to learn more about the planet's amazing animals on this excursion was very rewarding and why I love Biology!' - Carma Norton

'I learned that on top of endotherms and ectotherms, there are also poikilothermic ectotherms, homeothermic endotherms, and more uncommonly, poikilothermic endotherms and homeothermic ectotherms' - Mikayla Petrusich

'The trip to Perth Zoo was very fun with our Biology class, as we not only made some interesting new observations, but a lot of new memories too' - Christina Ostaszewskyj

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