Chapter 3.3 Receptors and Reflexes Flashcards
What is a receptor?
A receptor is a structure that is able to detect a change in the body’s internal or external environment.
Define sense organ
It is receptors grouped into a discrete organ e.g. eye
Define stimulus
Stimulus refers to any change, internal or external, that causes a response
Define thermoreceptors
Thermoreceptors are able to respond to heat and cold
Define Osmoreceptors
A receptor sensitive to osmotic pressure of body fluids
Define chemoreceptors
A receptor sensitive to particular chemicals
Define touch receptors
A receptor sensitive to touch
Define pain receptors
A receptor that is stimulated by damage to tissues
Define reflex
A reflex is a rapid, automatic response to a change in the external or internal environment; tries to restore homeostasis
