Unit 6 - Organisms respond to changes in their internal and external environments
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Organisms Respond to changes in their environments Condensed Notes
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Unit 6 - Organisms respond to changes in their internal and external environments
Institution
AQA
The following document contains my structured and easy to read condensed notes filled with great diagrams for all of Biology AQA A level. The boxes for every chapter contain all the concepts you need to know for each chapter with the notes are followed below. Notes are bite sized and will help with...
organisms respond to changes in their environments
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A/AS Level
AQA
A Level Biology
Unit 6 - Organisms respond to changes in their internal and external environments
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Organisms Respond to changes in their
environments
● Response to Stimuli
○ Plant growth factors
■ Tropisms
○ Control of heart rate
■ Pressure/chemoreceptors
○ Receptors
■ Pacinian corpuscles
■ Eye: rods/cones
○ Nervous organisation
■ Reflex arc
● Nervous coordination and muscles
○ Synapses
■ Synaptic transmission
○ Nerve impulse
■ Resting potential
■ Action potential
■ Speed of nerve impulse
○ Structure of muscle
■ Muscle contraction
■ slow/fast twitch
● Homeostasis
○ Principles
○ Feedback mechanisms
○ Hormones and regulation
○ Hormones in osmoregulation
○ Control of blood water potential
○ Structure and role of nephron
● Response to stimuli
● Responding to their environment helps organisms survive
● The nervous system
, ○ Reflex arc
■ Stimulus → Receptors → Central Nervous System → Effectors →
Response
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