L3: Nerves -- Action Potentials

Describe the divisions of the nervous system and their general functions. Which system delivers input signals to the integrating center? Which system delivers output signals to produce a response?

There are 2 divisions which are the centra nervous system (integration center) and the peripheral nervous system. The PNS is made up of sensory afferent division (carries info from receptors to CNS) and motor efferent division (CNS to effectors). The motor is made up of somatic (voluntary control of skeleton) and autonomic (involuntary of smooth/cardiac/glands). The autonomic is made up of sympathetic (fight or flight) or parasympathetic (rest and digest)

Describe the anatomy of a neuron

It consists of dendrites, a cell body, an axon, an axon hillock, myelin sheaths, and post synaptic dendrite.

Define equilibrium potential. Be able to use the Nernst equation to calculate the equilibrium potential of an ion.

This refers to an ion at this specific potential at which there is no net movement of that ion across the membrane, so the electrical driving force exactly balances the chemical driving force

Understand the important of the Goldman-Hodgkin-Katz equation and use it to calculate the resting membrane potential.

The importance comes from that the equation measures membrane potential by considering multiple ion concentrations and their relative membrane permeabilities