Chapter 12 - Nervous System Flashcards
Neurology
The study of the nervous system
Neuro = neuron -logy = study
Neuron
A nervous tissue cell that can generate a neuronal action potential.
What is the nervous system made of?
Organs + structures of nervous tissue. Also connective + muscular tissue.
Weight of the nervous system?
3% of body weight
Smallest of the body
True or False.
Most complex system of the body?
True.
Forms an intricate network all over the body.
What are the TWO main subdivisions of the nervous system?
Central = brain and spinal cord. Peripheral = nerves, ganglia, plexuses, sensory receptors.
Functions of the Nervous System
Processes incoming sensory information.
Generates emotions, thoughts, and memories.
Originates signals to stimulate muscles + glands.
What organs or structures are part of the central nervous system (CNS)
Brain
Spinal cord
What organs or structures are part of the peripheral nervous system (PNS)
Nerves
Sensory receptors
Ganglia
Enteric plexuses
What nervous tissues cells are capable of generating action potentials?
Neurons
What are the effector cells that are able to receive and respond to the neurotransmitters released by a neuron?
Neuron
Myocyte
Gland cell
Which portion of a neuron contains synaptic vesicles with neurotransmitters inside?
Synaptic terminals
What is the function of myelin sheath around the axon of neurons?
Electrical insulation
Which glial cells of the CNS create a BBB?
Astrocytes
What is the function of ependymal cells in the CNS
Produce cerebrospinal fluid (CSF)
