Grade 12 Biology: Neuron Worksheet
This worksheet covers the structure, function, and types of neurons, including action potentials and neurotransmission, suitable for Grade 12 Biology students.
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Grade 12 Biology: Neuron Worksheet
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Read each question carefully and provide your answers in the space provided. For multiple-choice questions, circle the correct option.
1. Which part of the neuron receives signals from other neurons?
Axon
Dendrite
Cell body
Myelin sheath
2. The resting membrane potential of a neuron is primarily maintained by:
Sodium-potassium pump
Voltage-gated sodium channels
Ligand-gated ion channels
Calcium channels
3. The insulating layer around the axon that speeds up nerve impulse transmission is called the .
4. Gaps in the myelin sheath along the axon are known as the .
5. Briefly describe the process of an action potential.
6. Explain the role of neurotransmitters in synaptic transmission.
7. Label the indicated parts of the neuron diagram below.
A.
B.
C.
D.
E.
8. Match the neuron type with its primary function.
1. Sensory Neuron
a. Transmits signals between neurons
2. Motor Neuron
b. Carries signals from CNS to muscles/glands
3. Interneuron
c. Carries signals from sensory organs to CNS
9. The depolarization phase of an action potential is caused by the influx of potassium ions.
True
False
10. The refractory period ensures that an action potential moves in only one direction along the axon.
True
False