nervous system Flashcards
central nervous system
brain and spinal cord
peripheral nervous system
nerves
motor (effector) neuron
PNS - carry info from the CNS to the effectors (muscles and glands) so they can respond, chunky long axon
sensory (affector) neuron
PNS - they can info from the receptors to the CNS, have more dendrites
inter neuron
CNS - carry info between neurons of all types, in a smaller space they try to connect with as many diff neurons as possible
receptor
a cell or group of cells that receive stimuli
stimulus
a thing or event that evokes a specific functional reaction in an organ or tissue
Photoreceptor
Sensitive to light and are located in the eyes
Thermoreceptors
sensitive to temperature changes and are located in the skin
Pain receptors
Sensitive to chemical changes in damaged cells and are located throughout the body but most are located on the skin
Mechanoreceptors
Sensitive to touch, pressure, sound and motion and are located in the skin, the inner ear and muscles
Chemoreceptors
Sensitive to chemicals such as odour molecules in the sir and are located in the nose and tongue
order
stimulus - receptor - coordinator- effector - response
