Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
What variable number of slender, sensitive processes (extensions) extend out from the cell body? |
Dendrites |
|
|
What do dendrites play a key role in? |
Intercellular communication |
|
|
Typical dendrites are highly branched, and each branch has fine .5-1um long studded processes called _________ ______. |
Dendritic spines |
|
|
In the CNS what primarily happens at the dendritic spines? |
a neuron receives information from other neurons |
|
|
What percent of the neuron's total surface area do dendritic spines make up? |
80-90 percent |
|
|
What is a long cytoplasmic process capable of propagating an electrical impulse known as an action potential called? |
An axon |
|
|
What is the cytoplasm of the axon called? |
Axoplasm |
|
|
What does the axoplasm contain? |
Neurofibrils, Neurotubule, Small vesicles, Lysosomes, Mitochondria, and various enzymes |
|
|
What specialized portion of the plasma membrane surrounds the axoplasm? |
Axolemma |
|
|
In the CNS, the axolemma may be _______ to the interstitial fluid or, it may be _______ by the cellular processes of _________. |
Exposed, Covered, Neuroglia |
|
|
What is another name for the base of the axon in a multipolar neuron? |
Initial Segment |
|
|
What thickened region joins the initial segment of the axon and the cell body? |
Axon Hillock |
|
|
When an axon produces a side branch, what is it called? |
collaterals |
|
|
What enable a single neuron to communicate with several other cells? |
collaterals |
|
|
What are the axon trunk and any collaterals that end in a series of fine extensions called? |
Telodendria |
|
|
What is another word for telodendria? |
Terminal branches |
|
|
Where do the telodendria end at? |
Axon terminal |
|
|
The axon terminals play a role in: |
Communication with another cell |
|
|
What are other names for the axon terminals? |
synaptic terminals, synaptic knobs, and synaptic boutons |
