kins 1100 nervous sytem 3

classification of receptors based on stimulus

mechanoreceptors, chemoreceptors, and nociceptors, photoreceptors,

classification by location on body

exteroceptors: surface of body

interoceptors: deep in body

proprioceptors: in skeletal muscles, joints, ligament, tendon, connective tissue of muscles and bone. detect tissue stretch

classification by complexity

complex: 5 special senses

simple: everything else

what is the muscle spindle

it is a mechanoreceptor, by location it is a proprioceptor, by complexity it is simple, it detects stretch in muscle length

whats the golgi tendon

the function of the golgi tendon detects tendon stretch not muscle stretch but it is a mechano proprioceptor and is simple

what are somatic spinal reflexes

ex: kneejerk, it does not go to the brain but since in involves the skeletal muscles we call it somatic

1 receptor, 2 sensory neuron, 3 integration center (spine) , 4 motor neuron, effector

what are the 2 types of ion channels

leakage (non gated) channels and gated channels

what are the 3 main types of gated channels

voltage channels, chemical channels, mechanical channels

what is the resting membrane potential

voltage difference across potassium and sodium are both positively charged. theres more potassium inside the nueron and sodium outside. More potassium goes out of the cell than sodium goes in because there are more potassium leak channels than sodium leak channels. th difference is reversed/maintained with the sodium potassium pump.

whats the value of the active membrane potential

-70mv

where are the voltage gated channels located in the nerves

in the axon hillock of the cell body