PHSI 208 Chapter 10: PHSI 208.6 Chapter 10 Notes (VC14)
Document Summary
The receptor acts as as a transducer which translates the external signal to an action potential. Transducers take 1 form of info and translate it to an electrical signal. The stimulus is converted into an intracellular signal which usually changes in membrane potential. Stimulus threshold action potential on cns. Integration in the cns is controlled by the cerebral cortex, or acted on subconsciously. The three most common examples of receptors are simple receptors, complex neural receptors, and special senses receptors. Complex neural receptors: have nerve endings enclosed in connective tissue capsules. An example is the pacinian corpuscle senses touch. Layers of connective tissue enclose the nerve ending where the stimulus is applied. Special sense receptors: most of these are cells that release neurotransmitters onto sensory neurons, initiating an action potential. Hair cells found in the ears are examples of special sense receptors. The specialized receptor hair cell connects to sensory neurons, and pressure creates.
