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Homeostasis

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by

Mark Van Arsdale

on 28 March 2015

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Transcript of Homeostasis

Homeostasis
Receptors
Disruption - produces a stimulus
Detect a stimulus
Control Center
Message is passed on to the
Effectors
Muscles or glands that produce a response
Send a message to the
Which trigger a response to restore
Negative Feedback
the response is opposite of the stimulus
restores homeostasis
returns levels back to normal
i.e. insulin-glucose balance
Positive Feedback
the response strengthens the stimulus
further disrupts homeostasis
i.e. uterine contractions during labor
Neurons vs hormones
Stimulus
Stimulus
Response
Response
Travels everywhere, slowly
Hits a specific location quickly
The Endocrine System
Thermoregulation
What are the differences between a walrus and a lizard?
How does a birds keep their feet from freezing in the winter?
How do humans regulate temperature?
Full transcript