GCSE Biology Revision "Negative Feedback"

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In this video, we look at the roles of adrenaline and thyroxine and then explore how thyroxine levels are controlled by negative feedback.

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Image credit:

Beating heart By DrJanaOfficial - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index...

Music credit:

Deliberate Thought by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/...)
Source: http://incompetech.com/music/royalty-...
Artist: http://incompetech.com/