Download neuron worksheet

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Date
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Part A. Using the terms on the diagrams on the opposite page to answer the following terms.
1.
is the very end of the neuron where the neurotransmitters are located
2. The nucleus is located in the
3.
of the neuron.
is the part of the neuron that received a stimulus from the environment or a previous
neuron
4. A single neuron can be over a meter long due to the length of its
5. The layer of insulation that forms around the axon is the
6.
.
are chemicals that pass across the space between two neurons.
7. The space between the dendrites of one neuron and the synaptic terminal of another neuron is a
8. The spaces between the myelin sheaths are the
Part B. Place the events described below in the correct sequence by writing the numbers 1 through 6 in the spaces
provided. Be sure to read ALL the statements to determine the first statement.
Impulse reaches the axon terminal.
Sodium ions flow inside the cell membrane causing the axon to have a positive charge.
The impulse travels down the dendrites toward the cell body
Neurotransmitters of one neuron stimulates the cell membrane of another neuron to allow the impulse to cross the
synapse
The nerve impulse flows in one direction down the axon. As the nerve impulse passes along the neuron,
potassium ions move outside the cell membrane.
Stimulus is detected by the dendrites at the end of the neuron.
Part C.
1.
What does the myelin sheath do for a neuron. Explain how.
2.Where are the sodium and potassium ions found on a resting axon?
3. Place the following in order of how the stimulus would travel through the body: Motor neurons, interneruons, sense
organs, muscles, sensory neurons
4. Place the following neuron parts in order from how an impulse would travel: axon, dendrite, axon terminal, cell body
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Date
Period
Word Bank: Some words will be used more than once
Axon, Dendrites, Synapse, Axon terminal, Myelin Sheath, Neurotransmitter, Node, Nucleus