Neuronal Transmission Flashcards
Dendrites
a short branched extension of a nerve cell, along which impulses received from other cells at synapses are transmitted to the cell body.
a short branched extension of a nerve cell, along which impulses received from other cells at synapses are transmitted to the cell body.
Dendrite
Cell Body
the nucleus-containing central part of a neuron exclusive of its axons and dendrites that is the major structural element of the gray matter of the brain and spinal cord, the ganglia, and the retina—called also perikaryon, soma.
the nucleus-containing central part of a neuron exclusive of its axons and dendrites that is the major structural element of the gray matter of the brain and spinal cord, the ganglia, and the retina—called also perikaryon, soma.
Cell Body
Axon
the long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.
the long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.
Axon
Collaterals
One of the branches that bifurcates off the primary axon is the axon ______, and it projects back toward the cell itself.
One of the branches that bifurcates off the primary axon is the axon _______ and it projects back toward the cell itself.
Collaterals
Myelin
a mixture of proteins and phospholipids forming a whitish insulating sheath around many nerve fibers, increasing the speed at which impulses are conducted.
a mixture of proteins and phospholipids forming a whitish insulating sheath around many nerve fibers, increasing the speed at which impulses are conducted.
Myelin
Nodes of Ranvier
a gap in the myelin sheath of a nerve, between adjacent Schwann cells.
a gap in the myelin sheath of a nerve, between adjacent Schwann cells.
Nodes of Ranvier
Axon Hillock
a specialized part of the cell body (or soma) of a neuron that connects to the axon. The axon ______ is the last site in the soma where membrane potentials propagated from synaptic inputs are summated before being transmitted to the axon.
a specialized part of the cell body (or soma) of a neuron that connects to the axon. The axon _______ is the last site in the soma where membrane potentials propagated from synaptic inputs are summated before being transmitted to the axon.
Axon Hillock
Presynaptic Terminal
The distal terminations of axons which are specialized for the release of neurotransmitters. Also included are varicosities along the course of axons which have similar specializations and also release transmitters
