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A Level Biology - Communication and Homeostasis

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slidingtacos
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Last updated: November 1, 2018
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First submittedNovember 1, 2018
Times taken71
Average score55.6%
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Definition
Keyword
Cells/sensory nerve endings that respond to a stimulus in the internal or external environment of an organism and can create action potentials
Sensory receptors
The mechanism that increases a change, taking the system further away from the optimum
Positive feedback
A cell, tissue or organ that brings about a response
Effector
The part of the brain that coordinates homeostatic reponses
Hypothalamus
An organism that relies on external sources of heat to maintain body temperature
Ecotherm
An organism that uses heat from metabolic reactions to maintain body temperature
Endotherm
The mechanism that reverses a change, bringing the system back to the optimum
Negative feedback
Maintaining a constant internal environment despite changes in external and internal factors
Homeostasis
The way in which cells communicate with each other
Cell signalling
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