Nerves, Signaling, CSF, Membrane transport Flashcards
What is the endoneurium?
The tissue lining the innermost layer of a nerve, surrounding each individual cell
What is the perineurium?
The tissue surrounding each bundle (fascicle) of nerve cells
What is the epineurium?
The outermost tissue surrounding a nerve
What structures are part of the central nervous system?
Brain and spinal cord
What structures are part of the peripheral nervous system?
All the nerves of the body including the cranial nerves
What is an afferent nerve?
A nerve that receives sensory input (A= arrives)
What is an efferent nerve?
A nerve that produces motor output (E= exit)
True or false: electrical signals can travel up and down the same neuron
FALSE: an electrical signal can only travel one way through a certain neuron.
What is the functional unit of the nervous system?
The neuron
What are dendrites?
The branches off the soma that receive information from their environment
Where are the nucleus and organelles located in a neuron?
The soma (cell body)
What structure of the neuron carries information from the receiving end to the transmitting end?
The axon
What structure of the neuron transmits information from the neuron to the next cell?
Axon terminals
What type of neuron structure is found in the CNS and motor neurons?
Multipolar
What type of neuron structure is associated with the special senses like sight and smell?
Bipolar
What type of neuron structure is associated with the sense of touch?
Unipolar
Where do nerve bodies synapse (connect) in the brain?
Grey matter
Where do the axons travel through the brain?
White matter