Lab 11 Flashcards
What cells are responsible for sending out action potentials?
Neurons
2 cell types found in nervous tissue
Neurons
Neuroglia cells
Another name for action potentials
Nerve impulses
What neuron structures contains the nucleus?
Body
What neuron structure receives messages from other neurons?
Dendrites
What structure produces and transmits action potential?
Axon
What do nuclei and ganglia have in common?
They are both clusters of cell bodies
How are nuclei and ganglia different?
Nuclei: central nervous system
Ganglia: peripheral nervous system
What is an axolemma?
An axons plasma membrane
Where does a neuron store it’s synaptic vesicles containing neurotransmitters?
Axon terminal
What is the purpose of neurotransmitter release?
Sends messages to a target, can be another neuron across a synaptic cleft
Function of dendrites
They receive messages from other neurons, transmit messages to neurons cell body
Can dendrites produce action potentials?
No
What is the most common type of neuron?
Multipolar
Which are less common and associated with sensory functions?
Bipolar and unipolar
What is the function if the synapse?
Junction where neurons communicate with one another
Presynaptic neuron
Sends messages, contains neurotransmitters packaged in synaptic vesicles in its axon terminals
Synaptic cleft
Small space in nmj where two neurons are separated, filled with ECF through which neurotransmitters diffuse when they are released from synaptic vesicles
Post synaptic neuron
Receives message, plasma membrane contains receptors for neurotransmitters. When neurotransmitters bond to receptors, the membrane potential changes
Which cell type is smallest and most abundant?
Neuroglia
