Lecture 3. Anatomy of the Nervous System Flashcards
A complex network of nerves and cells that carry messages to and from the brain to the spinal cord to various parts of the body
Nervous System
Relevance of Nervous System to Psychology
to understand behavior, one must understand how the brain works. it is necessary to understand what it is, how it works, and how they are connexted to operate with one another
Highly specialised cells in the NS that is responsible for conduction, reception and transmission of electrochemical signals
Neurons
3 classes of neurons acc. to structure
unipolar, bipolar and multipolar
Neuron with one process extending from its cell body
Unipolar Neurons
Location of Unipolar Neurons
afferent division of PNS
pseudounipolar neurons
if the axon extending from its cell body splits into two branches
neurons with two processes extending frim its cell body
Bipolar Neurons
Two Processes of Bipolar Neurons
Dendrite and Axon
Bipolar Neurons are also sensory neurons found in?
Olfactory Epithelium and retina of the eye
Neuron with more than two processes extending from its cell body
Multipolar Neurons
Processes in Multipolar Neurons
has a single axon and multiple dendrites
Example of Multipolar Neurons
Purkinje Cell
Classes of Neurons Acc. to Function
Sensory or Afferent Neurons, Motor or Efferent Neurons, Interneurons
Transmit neurons from sensory receptors in the skin, or internal organs towards CNS for processing
Sensory or Afferent Neurons
Transmit neurons away from CNS towards some type of effector
Motor Neurons or Efferent Neurons
Neurons with a short axon or no axon at all located between sensory and motor pathways, and highly involved in signal integration
Interneurons
A selectively permeable or semipermeable membrane that encloses the neuron
Neuron Cell Membrane
Neuron Cell Membrane is also know as and consists of?
A phospholipid bilayer that consists of hydrophobic tails and hydrophilic heads.
What is embedded in the lipid bilayer in neuron cell membrane?
Protein molecules
What are the protein molecules embedded in lipid bilayer?
Channel Protein - facilitates the transport of substabces across a cell membrane
Signal Protein - transfers a signal to the inside of the neuron when a particular molecule bind to them on the outside of the membrane
metabolic center of neuron
Cell Body
Cell Body is also known as
Soma
Cell body contains
nucleus and other important organelles
