Divisions and Functions of the Nervous System Flashcards
What does the Peripheral Nervous System (PNS) include
- Sensory Neurons
- Nerves
What are the 2 Types of Nervous Systems
- Autonomic
- Somatic
What are the 2 Autonomic Divisions
- Sympathetic Division
- Parasympathetic division
What are the 5 Building Blocks of the Nervous System
- Neurone
- Oligodendrocytes in the CNS
- Schwann cells in the PNS
- Astrocytes
- Microgila
What are Neurons
a highly specialised cell / an individual nerve cell
How do Neurons work
They transmit the information as Electrical signals / Nerve impulses
In What directions do Signals Travel
From Dendrites to Axon
What are the Nodes of Ranvier
The gaps in the Myelin Sheath on the axon
What are the 2 Functional types of Neurons?
Peripheral Nervous System
Central Nervous System
Define a nerve
A group or bundle of Specialised cells (neurons) that transmit an electrical impulse throughout the body
What is a Synapse
Where one neuron meets another
What are Receptors
Structures on a membrane where ligand binds to and affects the cell
What does an Excitatory synapse mean?
Can cause depolarization
What does an Inhibitory Synapse mean?
Can cause Hyperpolarisation
What are the 3 Excitatory Neurotransmitters
- Glutamine
- Monoamines
- Acetylcholine
