Learning objective
Distinguish internal and external environmental changes.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
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Flashcards
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Questions
Topic
Response and homeostasis official content
Subtopic
Stimuli, both internal and external, are detected and lead to a response
Study support
Understand this objective
Quick explanation
Distinguish internal and external environmental changes
- This point belongs to Response and homeostasis official content, especially Stimuli, both internal and external, are detected and lead to a response.
- You need to be able to distinguish internal and external environmental changes.
- The key ideas to know are external environment.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Stimuli, both internal and external, are detected and lead to a response to exam-style questions, flashcards, and revision notes for Response and homeostasis official content.
Quick student answer
Which of the following is an example of an internal environmental change that an organism might detect?
Direct answer
A decrease in blood glucose levels
Key terms
- Stimulus: A detectable change in the internal or external environment that elicits a response from an organism.
- Response: The action or change in behavior of an organism as a result of detecting a stimulus.
Common trap
Confusing internal and external stimuli: Remember that internal stimuli originate from within the organism, while external stimuli come from the environment.
Related questions
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Flashcard prompts
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Revision tools
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Explain why organisms detect internal and external stimuli.
Stimuli, both internal and external, are detected and lead to a response
- Link stimulus detection to responses that increase survival.
Stimuli, both internal and external, are detected and lead to a response
- Relate coordination systems to organism responses.
Stimuli, both internal and external, are detected and lead to a response
- Explain how receptors convert stimuli into nervous impulses.
Nervous coordination
- Describe Pacinian corpuscle and retinal photoreceptor function.
Nervous coordination