SGL Case 4 PreCase Quiz Flashcards
(22 cards)
The functional unit of the nervous system is a highly specialized, excitable cell called a
Nerve cell or neuron
Neurons consist of what three components
- Soma or cell body
- Dendrites
- Axon
The soma contains the _______ and its surrounding _______
The soma contains the nucleus and its surrounding cytoplasm (perikaryon)
Processes that arise as multiple tree-like branches of the soma
Dendrites
They form a dendritic tree collectively
The entire surface of the dendritic branches is covered by small protrusions called ________
dendritic spines
___________ establish numerous axonal synaptic connections
Dendritic spines
Neurons have a _______ originating from the soma at the axon hillock
single axon
Neurons have a single axon originating from the soma at the axon hillock and ending in a terminal arborization, the ________
Telodendron
Each terminal branch of the ________ has an enlarged ending, the synaptic terminal
Telodendron
Axons branch at their ______ end(the telodendron)
distal
The ___________and the _________are specialized for the reception and integration of information.
The surface membrane of the soma and the dendritic tree are specialized for the reception and integration of information
The _______ is specialized for the transmission of information in the form of an action potential or a nerve impulse.
The axon
Different types of neurons can be identified on the basis of _____ and ___________
Number and length of processes emerging from the soma
_______ display many processes attched to a polygonal-shaped soma.
Multipolar neurons
______ include a single axon and more than one dendrite
multipolar neurons
_______ neurons are the most abundant neurons in the nervous system
Multipolar neurons
Pyramidal cells of the cerebral cortex and Purkinjie cells and neurons are examples of what type of neuron
Multipolar neurons
______ neurons have two processes.
Bipolar neurons
What neurons are typical of the visual, auditory, and vestibular system
Bipolar neurons
_______ neurons have only one short process leaving the cell body
Pseudounipolar neurons
Which neurons are localized in sensory ganglia of cranial and spinal nerves?
Pseudounipolar neurons
Pseudounipolar neurons derive from _______
bipolar neuroblasts and the two neuronal processes fuse during later development
