Ch. 13

• Sensory receptors (afferent) •Peripheral nerves and associated ganglia • Motor endings (efferent)

1. Sensory neurons conduct signals from receptors to CNS 2. Inter neurons (association neurons) are confined to CNS 3. Motor neurons conduct signals from CNS to effectors such as muscles and glands

a structure specialized to detect a stimulus (dendrite)

bare nerve endings

nervous tissue surrounded by other tissues that enhance response to a certain type of stimulus

1. Modality 2. Location 3. Distribution

temp changed

respond to light (cones/rods in retina)

respond to pain

chemicals smelled or tasted, fluid chemistry of blood

mechanical force (touch, blood pressure, vibrations, stretch)

superficial dermis

deeper dermis

detect external stimuli (near surface); touch, pressure, pain, temp, hearing, vision, smell, taste

detect internal stimuli; viscera and blood vessels; chemical changes, tissue stretch, temp, pain, hunger thirst