Learning objective
Explain why organisms detect internal and external stimuli.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
0
Flashcards
0
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
Explain why organisms detect internal and external stimuli
- 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 explain why organisms detect internal and external stimuli.
- The key ideas to know are detect, organisms, and external.
- 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 best describes the role of receptors in detecting stimuli?
Direct answer
Receptors convert stimuli into electrical signals that can be processed by the nervous system.
Key terms
- Receptor: A specialized cell or protein that detects and responds to specific stimuli by converting them into electrical signals.
- Effector: An organ or cell that acts in response to a stimulus, such as muscles or glands that carry out the response.
Common trap
Confusing receptors with effectors: Remember that receptors detect stimuli and convert them into signals, while effectors are responsible for executing the response.
Related questions
Try this as a practice card
Question 1 of 3
Choose an answer, get feedback, then move sideways through the set.
Flashcard prompts
Flip through the key recall cards
Flashcard 1 of 3
Revision tools
Choose how to practise
Flashcards0 linked cards
Practice Questions0 linked questions
Revision notestopic notes
Open the full topic revision notes when you are ready to review this objective in context.
Open revision notesRelated learning objectives
- Link stimulus detection to responses that increase survival.
Stimuli, both internal and external, are detected and lead to a response
- Distinguish internal and external environmental changes.
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