Nervous System Worksheet: Labeling a Neuron Diagram

Let’s solve this step by step.

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Part 1: Labeling the neuron diagram

We are given four labels to place on the diagram:
→ Axon
→ Myelin sheath
→ Cell body
→ Dendrites

Looking at the diagram:

- The big central part with the nucleus (labeled “1”) is the Cell body.
- The branching structures coming out of the cell body (labeled “5”) are Dendrites — they receive signals.
- The long fiber going from the cell body to the end (labeled “4”) is the Axon — it carries the signal away.
- The fatty coverings around parts of the axon (labeled “3”) are the Myelin sheath — they speed up the signal.
- The very ends (labeled “2”) are called Axon terminals, but that label isn’t in our list for Part 1, so we ignore it here.

So for Part 1:
- 1 → Cell body
- 3 → Myelin sheath
- 4 → Axon
- 5 → Dendrites

*(Note: The question says “Add the following labels” and lists them, but doesn’t ask us to write numbers — just to know where they go. Since Part 2 is the main matching task, we’ll focus there.)*

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Part 2: Match descriptions to terms

We have 12 descriptions and 12 lettered terms (A–L). Let’s match each one carefully.

List of terms again:
A. Synapse
B. Axon
C. Myelin sheath
D. Nerve impulse
E. Sense receptor
F. Response
G. Reflex
H. Cell body
I. Dendrite
J. Nerve
K. Neurotransmitter
L. Axon terminal

Now go one by one:

1. *The long fiber that carries the nerve impulses.*
→ That’s the Axon → B

2. *A bundle of axons.*
→ That’s a Nerve → J

3. *The connection between adjacent neurons.*
→ That’s the Synapse → A

4. *The chemical secreted into the gap between neurons at a synapse.*
→ That’s Neurotransmitter → K

5. *A rapid automatic response to a stimulus.*
→ That’s a Reflex → G

6. *The covering of fatty material that speeds up the passage of nerve impulses.*
→ That’s the Myelin sheath → C

7. *The structure at the end of an axon that produces neurotransmitters to transmit the nerve impulse across the synapse.*
→ That’s the Axon terminal → L

8. *The high speed signals that pass along the axons of nerve cells.*
→ That’s the Nerve impulse → D

9. *The branching filaments that conduct nerve impulses towards the cell.*
→ Those are Dendrites → I

10. *The sense organ or cells that receive stimuli from within and outside the body.*
→ That’s a Sense receptor → E

11. *The reaction to a stimulus by a muscle or gland.*
→ That’s a Response → F

12. *The part of the nerve cell containing the nucleus.*
→ That’s the Cell body → H

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Let’s double-check we didn’t miss any or repeat:

Used: B, J, A, K, G, C, L, D, I, E, F, H → All 12 letters used once. Perfect.

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Final Answer:

1. B
2. J
3. A
4. K
5. G
6. C
7. L
8. D
9. I
10. E
11. F
12. H