Lecture 1: Structure and Function of the Nervous System Flashcards
What are the 3 main functions of the nervous system?
Sensory function, integrative function and motor function
What is sensory function?
Senses internal and external changes
What is integrative function?
Analyses and stores information and makes decisions and responses
What is motor function?
Muscular activity or glandular secretions
What is the role of the CNS?
Integrates sensory information
Generates thoughts
Stores memory
Initiates motor activity
What is the role of the PNS?
Carry nerve impulses to and from. the CNS
It connects the CNS to sensory receptors, muscles and glands
What are the two types of nervous cell types?
Neurones
Glia cells
What are glia?
Diverse support and development functions
Where do neurones receive informations?
Dendrites
What are the the properties of action potentials?
All or none
Saltatory conduction
Intensity of the signal is frequency
There a short refractory period
Are synapse electrical or chemical?
Both
What is the amount in one vesicle called?
Quantum
What is forward genetics?
Identity the genes responsible for particular phenotype
What is reverse genetics?
Alter specific genes to determine their role in phenotype/ biological function
Do invertebrates or vertebrates have fewer but larger and more complicated neurones?
Invertebrates
