AQA A level Biology - Topic 6 - survival and response questions and answers already passed
What is a stimulus? A change in the environment of an organism What is a tactic response? Directional movement in response to a stimulus What is a kinetic response? Non directional random movement in response to a stimulus What is a positive and negative taxis? Positive taxis- organism moves towards stimulus Negative taxis - organism moves away from stimulus What Are receptors? Detect stimuli- can be cells or proteins on cell surface membrane , loads of different types What are effectors? Cells that bring about a response to a stimulus to provide an effect ( muscle cells, glands)
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aqa a level biology topic 6
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