Neuron Structure
What are the essential structures that make up a neuron?
Why?
Cells are specialized for different functions in multicellular organisms. In animals, one unique kind of cell
helps organisms survive by collecting information and sending messages throughout the body. The shapes
and features of neurons, which are the primary cells in the nervous system, enable animals to experience
all of the five senses; find food, mates, and shelter; and to survive in their diverse environments.
Model 1 – Parts of a Neuron
fidesJody
dendrite Hou
in
tapse
1. Model 1 is an illustration of two neurons. Label one of the neurons in the diagram with the
following structures:
Cell body or soma Axon
Cell nucleus Synapse
Dendrites
2. Which structure(s) on the neuron in Model 1 would receive a signal from either a sensory cell
(taste bud, touch receptor, retinal cell) or from another neuron?
Dendrites
3. Draw an arrow through the two cells in Model 1 to show the path of a nerve impulse if a
message was being sent through the two neurons.
Neuron Structure
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1
https://www.coursehero.com/file/42904340/neuron-structure-pdf/
, Model 2 – Membrane Potential
Area of detail
K+
Na+
Outside of cell
Sodium/
potassium
pump –70 mV
Inside of cell ATP P
ADP
4. Describe the cellular structure shown in detail in Model 2.
Shows a phospholipidbilayer of neuron located near theend of
thedendriteThe
5. Identify each of these membrane
symbols in Model 2. is
imbeddedwith NINEpumps as well
phospholipid sodiunion potassium channel
6. Consider Model 2. ion protein
a. Which side of the membrane has more sodium ions when the neuron is at rest?
Outside
b. Briefly explain why sodium ions cannot cross the membrane without the use of a protein
channel.
Becausethey are polar
c. Which direction should sodium ions flow naturally if a channel is provided?
into the cell
2 POGIL™ Activities for AP* Biology
This study source was downloaded by 100000835361505 from CourseHero.com on 02-02-2022 13:59:41 GMT -06:00
https://www.coursehero.com/file/42904340/neuron-structure-pdf/
What are the essential structures that make up a neuron?
Why?
Cells are specialized for different functions in multicellular organisms. In animals, one unique kind of cell
helps organisms survive by collecting information and sending messages throughout the body. The shapes
and features of neurons, which are the primary cells in the nervous system, enable animals to experience
all of the five senses; find food, mates, and shelter; and to survive in their diverse environments.
Model 1 – Parts of a Neuron
fidesJody
dendrite Hou
in
tapse
1. Model 1 is an illustration of two neurons. Label one of the neurons in the diagram with the
following structures:
Cell body or soma Axon
Cell nucleus Synapse
Dendrites
2. Which structure(s) on the neuron in Model 1 would receive a signal from either a sensory cell
(taste bud, touch receptor, retinal cell) or from another neuron?
Dendrites
3. Draw an arrow through the two cells in Model 1 to show the path of a nerve impulse if a
message was being sent through the two neurons.
Neuron Structure
This study source was downloaded by 100000835361505 from CourseHero.com on 02-02-2022 13:59:41 GMT -06:00
1
https://www.coursehero.com/file/42904340/neuron-structure-pdf/
, Model 2 – Membrane Potential
Area of detail
K+
Na+
Outside of cell
Sodium/
potassium
pump –70 mV
Inside of cell ATP P
ADP
4. Describe the cellular structure shown in detail in Model 2.
Shows a phospholipidbilayer of neuron located near theend of
thedendriteThe
5. Identify each of these membrane
symbols in Model 2. is
imbeddedwith NINEpumps as well
phospholipid sodiunion potassium channel
6. Consider Model 2. ion protein
a. Which side of the membrane has more sodium ions when the neuron is at rest?
Outside
b. Briefly explain why sodium ions cannot cross the membrane without the use of a protein
channel.
Becausethey are polar
c. Which direction should sodium ions flow naturally if a channel is provided?
into the cell
2 POGIL™ Activities for AP* Biology
This study source was downloaded by 100000835361505 from CourseHero.com on 02-02-2022 13:59:41 GMT -06:00
https://www.coursehero.com/file/42904340/neuron-structure-pdf/
