Functions of nervous system Flashcards
Luigi Galvani discovered…
static electricity in 1780
Julius Bernstein discovered…
- nerves conduct signals at 28 meters/s
- chemical–> not electrical
- 1868
Hodgkin & Huxley Model
- 1952
- movement of ions in a nerve cell during an action potential
Resting Membrane Potential
-negative on inside of cell–> positive on outside (-70mv)
CNS
consists of brain and spinal cord
PNS
consists of all nervous tissue outside the CNS
nerve
bundle of nerve fibers (axons) and their sheaths
ganglion
collection of neuron cell bodies located outside of CNS
plexus
extensive network of axons and neuron cell bodies
sensory receptors
endings of neurons- detect temp, pain, touch, pressure, light, sound, order, etc
sensory division
afferent division- transmits action potential from sensory receptors to CNS
motor division
efferent- action potentials from CNS to organs such as muscles and glands
two divisions of the motor division are…
- somatic nervous system
- autonomic nervous system
somatic nervous system
voluntary
autonomic nervous system
involuntary-unconscious- smooth muscles and cardiac
