Chapter 3 pt. 1 Flashcards
What is the difference neurons and glia?
Neurons, receive and transmit information to other cells.
Glia, support cell (structurally and functionally!)
Waste management
Provide insulation (i.e., myelin sheath)
10 times more numerous than neurons but 1/10 the size
Glia is 10 times more numerous than ________ but 1/10 the size
neurons
______ is 10 times more numerous than neurons but 1/10 the size
Gila
What are the functions of the Glia?
- Support cell (structurally and functionally!)
- Waste management
- Provide insulation (i.e., myelin sheath)
- 10 times more numerous than neurons but 1/10 the size
What is the goal of the nervous system?
send and receive information
The nervous system is generally composed of what two primary kinds of cells?
- Neurons
2. Glia
Neuron structure: Cell body (orsoma) contains the ________ and other structures found in most cells.
nucleus
Neuron structure: ____ ______ (orsoma) contains the nucleus and other structures found in most cells.
cell body
Neuron structure: Cell body (________) contains the nucleus and other structures found in most cells.
orsoma
Neuron structure: ___________ receives information (i.e., charged ions) and sends to cell body.
dendrites
Neuron structure: Dendrites receives __________ (i.e., charged ions) and sends to cell body.
information
Neuron structure: Dendrites receives information (i.e., charged ions) and sends to ____ ______.
cell body
Neuron structure: Dendrites receives information (i.e., ________ ____) and sends to cell body.
charged ions
Neuron structure: When it comes to dendrites the greater the ________ _____, the more info it take sin.
surface area
Neuron structure: When it comes to dendrites the greater the surface area, the more _____ it take sin.
info
Neuron structure: thin fiber of constant diameter, in most cases longer than the dendrites.
Axon
Neuron structure: What are the functions of the Axon?
sends information from cell body to the pre-synaptic terminals to communicate with other neurons, glands, or muscles.
Neuron structure: Axons are in most cases longer than the __________
dendrites
Neuron structure: _______ are in most cases longer than the dendrites
Axons
Neuron structure: An axon sends information from ___ _____ to the pre-synaptic terminals to communicate with other neurons, glands, or muscles.
cell body
Neuron structure: An axon sends information from cell body to the ____-________ terminals to communicate with other neurons, glands, or muscles.
pre-synaptic
Neuron structure: An axon sends information from cell body to the pre-synaptic terminals to _____________ with other neurons, glands, or muscles.
communicate
Neuron structure: An axon sends information from cell body to the pre-synaptic terminals to communicate with other ________, ______, or ________.
neurons
glands
muscles
Neuron structure: A neuron can have many _________ but only one ______.
dendrites
axon
True or False:
Neuron structure: There CAN be many branches off of the axon.
True
Neuron structure: There CAN be many _________ off of the axon.
branches
Neuron structure: What is the difference between the presynaptic terminal and the postsynaptic terminal?
The presynaptic terminal is the end point of the axon that releases neuro-chemicals (i.e., neurotransmitter).
The postsynaptic terminal is the the dendrite on the receiving cell, contains receptor sites that neurotransmitter can bind to..
Neuron structure: insulating material covering axons in many neurons; speeds up communication along the axon.
Myelin sheath
The myelin sheath covers what section of a neuron?
it covers the axon
Is a myelin sheath a good thing or a bad thing? Why?
It is good, because it speeds up communication along the axon
What is a synaptic cleft?
the gap between Neurons
neurotransmitters travel through the ________ _______
synaptic cleft
little sacs filled with neurotransmitters
vesicles
