CH. 7 - Neurons & Synapses Flashcards
(22 cards)
Nervous system is divided into 2 parts:
Central Nervous System (CNS) and peripheral nervous system (PNS)
CNS is made of…
brain and spinal cord
PNS is made of…
Cranial and spinal nerves
How do neurons gather and transmit information? (3 parts)
Respond to stimuli, produce messages, release
Groups of cell bodies in CNS are called?
Nuclei
Groups of cell bodies in PNS are
ganglia
What is the cell body in a neuron responsible for?
Making macromolecules
Flow that moves soluble compounds toward nerve endings, via rhythmic contractions of axon
Axoplasmic flow
Transport that moves large and insoluble compounds quickly along microtubules
Axonal Transport
Anterograde transport moves materials _____ from cell body, using molecular motor ______
Away, kinesin
_________ transport moves materials toward cell body using molecular motor ______
Retrograde, dynein
Sensory/Afferent neurons conduct impulses _____ CNS
into
Motor/Efferent neurons conduct impulses ____ of CNS
out
Association/ Interneurons ______ NS activity
integrate
Cell body sits along side of single process
Pseudo unipolar
Dendrite and axon arise from opposite ends of cell body
Bipolar
Have many dendrites and one axon
Multipolar
PNS has ___ and ____ cells
Schwann and satellite cells
oligodendrocytes, microglia, astrocytes and ependymal cells are part of which nervous system?
CNS
In PNS each Schwann cell myelinates 1mm of 1 axon by wrapping round and round axon. What does this do?
Electrically insulates axon
Uninsulated gap between adjacent Schwann cells
node of Ranvier
