Spinal Cord and Nerves Worksheet
Grade 11 Biology worksheet covering the structure and function of the spinal cord and peripheral nerves, reflex arcs, and common disorders.
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Topics
Spinal Cord and Nerves
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Read each question carefully and answer to the best of your ability. Show all work for calculations. Good luck!
1. Which part of the neuron transmits signals away from the cell body?
Dendrite
Axon
Cell body
Myelin sheath
2. The gray matter of the spinal cord primarily consists of:
Myelinated axons
Unmyelinated axons and cell bodies
Neuroglia
Connective tissue
3. The spinal cord extends from the foramen magnum to the level of the first or second lumbar vertebra, ending in a tapered structure called the .
4. Sensory neurons enter the spinal cord via the root, while motor neurons exit via the root.
5. Describe the main functions of the spinal cord.
6. Explain the components of a reflex arc and how it allows for rapid, involuntary responses.
7. The peripheral nervous system consists of the brain and spinal cord.
True
False
8. Myelin sheaths increase the speed of nerve impulse transmission.
True
False
Match the term to its definition.
9. Ganglion
a. Bundle of axons in the CNS
10. Plexus
b. Collection of neuron cell bodies outside the CNS
11. Tract
c. Network of intersecting nerves