Chp. 10 1.1 Touch
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20 Terms
Q: What is a sensory receptor?
A: A structure specialized to detect a stimulus.
Q: How can receptors be classified by structure?
A: dendritic endings (free or encapsulated) or modified epithelial cells.
Q: How can receptors be classified by function?
A: By the type of signal they transduce.
Q: What do chemoreceptors detect?
A: Chemicals in the environment or blood.
Q: What do photoreceptors detect?
A: Light.
Q: What do thermoreceptors respond to?
A: Cold or heat.
Q: What stimulates mechanoreceptors?
A: Mechanical deformation (e.g., touch, hearing).
Q: What do nociceptors detect?
A: Painful stimuli and tissue damage.
Q: Phasic receptor — what does it do?
A: Quick burst, then adapts.
Q: What do phasic receptors detect?
A: Changes in environment.
Q: What do phasic receptors allow?
A: Sensory adaptation.
Q: Phasic receptor examples?
A: Smell, touch, temperature.
Q: Tonic receptor — what does it do?
A: Fires constantly during stimulus.
Q: Tonic receptor example?
A: Pain.
Q: What is transduction?
A: Changing stimulus energy into nerve signals.
Q: What causes a receptor potential?
A: A stimulus.
Q: What is a receptor (generator) potential?
A: Small electrical change, like EPSP.
Q: Is receptor potential graded
A: Yes (e.g., light touch = small response).
Q: What is a sensation?
A: Awareness of a stimulus.
Q: Do all sensory signals cause sensation?
A: No — most don’t reach conscious awareness
Note 
Flashcards (40)