Nervous system - module 1 - bio 152, BIOD 152 Module 2 prova, A&P 2 module 3 exam
what are the cell types in the NS - (answer)two principle cell types:
- neurons = nerve cells
- glia
draw and label the structure of a neuron - (answer)- refer to notes
what is neuroglia. what are the names of the glia in the CNS vs the PNS? - (answer)AKA glia
- supportive cells of the nervous system
- located in the CNS (astrocytes, oligodendrocytes, microglia, ependymal cells)
- located in the PNS (Schwann cells, satellite cells)
what is the function of glia? - (answer)assist and support neuronal function by:
1. providing nutrients
2. speeding up movment of electrical signals within neurons
3. regulate the composition of the extracellular fluid in the brain and the spinal cord
4. modulating communication between neurons
what are the four functions a neuron must perform? - (answer)1. RECIEVE information from the
environment
2. PROCESS information and produce electrical signals
3. CONDUCT electrical signals over distances to a junction where it meets another cell
4. TRANSMIT information to other neurons, muscles, or glands
what is the axon hillock - (answer)where the cell body transitions to the axon, and where action
potentials are initiated
What are the four main parts of a neuron that carry out the four main functions? - (answer)1. dendrites
2. cell body (soma)
, Nervous system - module 1 - bio 152, BIOD 152 Module 2 prova, A&P 2 module 3 exam
3. axon
4. synaptic terminal
function of a dendrite - (answer)RESPOND TO STIMULI
- branches from the cell body that receive information
- branches provide a large surface area for receiving signals, from environment or other neurons
- in the brain and spinal cord usually respond to chemicals called neurotransmitters, which are released
by other neurons
function of cell body - (answer)PROCESSES SIGNALS FROM THE DENDRITES
function of the axon - (answer)CONDUCTS AXON CONDUCTS ACTION POTENTIALS ALONG LONG
DISTANCES
- long, thin axon extends outwards from the cell body and conducts action potentials from the cell body
to synaptic terminals
- typically bundled together into nerves
function of synaptic terminal - (answer)SIGNALS ARE TRANSMITTED FROM ONE CELL TO ANOTHER
- where a neuron communicates with another cell is called a synapse
what three elements does a synapse consist of? - (answer)1. PRESYNAPTIC MEMBRANE - formed by the
terminal button of axon
2. POSTSYNAPTIC MEMBRANE - composed of a segment of dendrite or cell body
3. SYNAPTIC CLEFT - space between the two structures above
draw and label diagram of a synapse - (answer)- refer to notes
Synaptic terminals contain __ released in response to __ reaching the __ - (answer)neurotransmitters,
action potential, terminal
what are the cell types in the NS - (answer)two principle cell types:
- neurons = nerve cells
- glia
draw and label the structure of a neuron - (answer)- refer to notes
what is neuroglia. what are the names of the glia in the CNS vs the PNS? - (answer)AKA glia
- supportive cells of the nervous system
- located in the CNS (astrocytes, oligodendrocytes, microglia, ependymal cells)
- located in the PNS (Schwann cells, satellite cells)
what is the function of glia? - (answer)assist and support neuronal function by:
1. providing nutrients
2. speeding up movment of electrical signals within neurons
3. regulate the composition of the extracellular fluid in the brain and the spinal cord
4. modulating communication between neurons
what are the four functions a neuron must perform? - (answer)1. RECIEVE information from the
environment
2. PROCESS information and produce electrical signals
3. CONDUCT electrical signals over distances to a junction where it meets another cell
4. TRANSMIT information to other neurons, muscles, or glands
what is the axon hillock - (answer)where the cell body transitions to the axon, and where action
potentials are initiated
What are the four main parts of a neuron that carry out the four main functions? - (answer)1. dendrites
2. cell body (soma)
, Nervous system - module 1 - bio 152, BIOD 152 Module 2 prova, A&P 2 module 3 exam
3. axon
4. synaptic terminal
function of a dendrite - (answer)RESPOND TO STIMULI
- branches from the cell body that receive information
- branches provide a large surface area for receiving signals, from environment or other neurons
- in the brain and spinal cord usually respond to chemicals called neurotransmitters, which are released
by other neurons
function of cell body - (answer)PROCESSES SIGNALS FROM THE DENDRITES
function of the axon - (answer)CONDUCTS AXON CONDUCTS ACTION POTENTIALS ALONG LONG
DISTANCES
- long, thin axon extends outwards from the cell body and conducts action potentials from the cell body
to synaptic terminals
- typically bundled together into nerves
function of synaptic terminal - (answer)SIGNALS ARE TRANSMITTED FROM ONE CELL TO ANOTHER
- where a neuron communicates with another cell is called a synapse
what three elements does a synapse consist of? - (answer)1. PRESYNAPTIC MEMBRANE - formed by the
terminal button of axon
2. POSTSYNAPTIC MEMBRANE - composed of a segment of dendrite or cell body
3. SYNAPTIC CLEFT - space between the two structures above
draw and label diagram of a synapse - (answer)- refer to notes
Synaptic terminals contain __ released in response to __ reaching the __ - (answer)neurotransmitters,
action potential, terminal
