Chapter 2.2 Flashcards
Parts of a neuron?
Dendrites, Soma, Axon, Myelin Sheath, Terminal Buttons
Function of dendrites?
Receive neural impulses.
What is the soma?
The cell body of the neuron.
Function of axons?
Transmit neural impulses
What is the myelin sheath
Insulating substance that speeds neural transmission.
Disorder caused by myelin sheath degradation?
Multiple Sclerosis (MS)
Role of terminal buttons?
Store and release neurotransmitters.
What are neurotransmitters?
Chemical messengers that bridge spaces between neurons.
What is a synapse?
The space between neurons where neurotransmitters are transmitted.
What is the synaptic cleft?
The gap between neurons where neurotransmitters are released.
What is a presynaptic neuron?
The neuron that releases neurotransmitters.
What are synaptic vesicles?
Storage sites for neurotransmitters in the terminal buttons.
What is a postsynaptic neuron?
The neuron that receives neurotransmitters.
What are receptor sites?
Areas on the postsynaptic neuron where neurotransmitters bind.
What is the “lock and key” model?
Neurotransmitters fit into specific receptor sites, like a key in a lock.
