Quiz 5: Neurons Flashcards
What do dendrites do?
Dendrite collects and stores all incoming information from axon terminals. Dendrites are the structures of neurons, which conduct electrical impulses toward the cell body of the nerve cell. Dendrites collect messages through other neurons or the nerves in the human body.
What is the general function of interneurons?
–Make connections between other neurons
–Modulate responses of motor & sensory neurons (and of other interneurons)
–Small, short distance
–Most common function of CNS neurons
The outside “skin” covering of the neuron is a ________ membrane, just like all other cells in the body
Bilipid layer
What is a synapse?
The small fluid-filled space between the end of one neuron that allows a signal to pass to the next neuron
The spaces between patches of myelin are called ________________ and the Action Potential ‘jumps’ across these spaces in a process called _________ conduction
Nodes of Ranvier
Saltatory
Put these terms in order of sequence for sending an action potential….
Axon, Axon Hillock, Dendrites, Terminal bouton
Dendrites –> Axon Hillock –> Axon –> Terminal Bouton
The _______ is specialized for sending (propogating) messages, and is covered by a fatty, white substance called ________.
Axon
Myelin
The ________ sums up the various excitatory and inhibitory signals that a neuron receives, and ‘decides’ whether an action potential will take place.
Axon Hillock
Neurotransmitters are contained in the ______ which are found in the ________
synaptic vesicles/terminal boutons
terminal boutons/teledendria
What is the threshold of excitation?
The net level/amount of excitatory neurotransmitters that must be present and tabulated by the Axon Hillock before it can initiate the action potential
What is one excitatory neurotransmitter?
Glutamate, dopamine, acetylcoline
What is one inhibitory neuron?
GABA
