The diagram shows the structure of a sensory neuron in the human body - Leaving Cert Biology - Question 6 - 2020
Question 6
The diagram shows the structure of a sensory neuron in the human body.
(a) Identify the part of the neuron labelled B.
(b) Name the substance (or group of substanc... show full transcript
Worked Solution & Example Answer:The diagram shows the structure of a sensory neuron in the human body - Leaving Cert Biology - Question 6 - 2020
Step 1
Identify the part of the neuron labelled B.
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Answer
The part of the neuron labelled B is the Axon.
Step 2
Name the substance (or group of substances) released by A during a nerve impulse.
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Answer
The substance released by A during a nerve impulse is a Neurotransmitter. An example of a neurotransmitter is Acetylcholine.
Step 3
Name the substance produced by the Schwann cell.
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Answer
The substance produced by the Schwann cell is Myelin.
Step 4
What is the function of this substance?
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Answer
The function of Myelin during a nerve impulse is to speed up the impulse or to insulate the axon.
Step 5
Draw an arrow, in the box provided near the diagram, to show the direction of the impulse.
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Answer
An arrow should be drawn from right to left in the space provided near the diagram.
Step 6
Disorder: Parkinson's Disease
Cause:
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Parkinson's disease is caused by a decrease in dopamine levels or imbalances in serotonin levels due to genetic mutations or environmental factors.
Step 7
Treatment:
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Treatment options for Parkinson's disease include the use of Levodopa (L-DOPA) with carbidopa or other medications, physical therapy, and deep brain stimulation as alternative treatments.
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