The document provides an overview of the nervous system, including its main components and how neurons function. It discusses the central and peripheral nervous systems, neurons and glia, and the parts and process of an action potential. Key points include that the nervous system is divided into the CNS and PNS, neurons have dendrites, a cell body and axon, and an action potential is how electrical signals are transmitted along the axon to communicate information.

2.  Introduction to the nervous system
 Central vs. peripheral nervous system
▪ Autonomic vs. somatic nervous system
 Components of the nervous system
 Glia
 Neuron
▪ Parts of a neuron
 Action potential

4. CENTRAL NERVOUS
SYSTEM
PERIPHERAL NERVOUS
SYSTEM

6.  The Autonomic Nervous System (ANS) can
be divided into:
 Sympathetic Nervous System
 “Fight or Flight”
 Parasympathetic Nervous System
 “Rest and Digest”

7. NEURON GLIA

14.  Basic building blocks of
the brain
 Parts of the Neuron
 Dendrites
 Soma (Cell Body)
 Axon
 Axon Terminal

16.  What do
dendrites
respond to?
 How do
dendrites
respond?

17.  Contains the
nucleus of the
neuron
 Receives
information from
dendrites

18.  Conducts information
 Can vary in length
 Afferent vs. efferent axon
 Myelin Sheath
 Nodes of Ranvier

23.  Where
information is
released
 Termination of
the action
potential which
may lead to the
release of a
neurotransmitter

24.  After the electrical
impulse reaches the
axon terminal, this
information may be
passed onto the
next neuron.
 Neurons contain 2
types of receptors
 Excitatory
 Inhibitory

25.  A nerve impulse is the electrical message
that is transmitted down the axon of a
neuron.
 Conducting an electrical impulse or action
potential means conducting information
within a neuron.

26.  Resting Membrane Potential (-70mV)
 K+, Na+, Ca2+, Cl-
 Inside vs. outside of the membrane
 Selective Permeability
 Electrical Gradient vs. Chemical Gradient

28.  Voltage-gated vs. Ligand-gated Ion Channels
 The all-or-none law states that the amplitude
and velocity of an action potential are
independent of the intensity of the stimulus
that initiated it.
 Action potentials are equal in intensity and speed
within a given neuron.