(a) (i) Name a disorder of the human nervous system - Leaving Cert Biology - Question 11 - 2010
Question 11
(a) (i) Name a disorder of the human nervous system.
(ii) In the case of the disorder referred to in part (i) state:
1. A possible cause.
2. A means of prevention or... show full transcript
Worked Solution & Example Answer:(a) (i) Name a disorder of the human nervous system - Leaving Cert Biology - Question 11 - 2010
Step 1
Name a disorder of the human nervous system.
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Answer
One disorder of the human nervous system is Parkinson's disease.
Step 2
In the case of the disorder referred to in part (i) state: 1. A possible cause.
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Answer
A potential cause of Parkinson's disease is the degeneration of dopamine-producing neurons in the brain.
Step 3
In the case of the disorder referred to in part (i) state: 2. A means of prevention or a treatment.
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One treatment for Parkinson's disease is the administration of dopaminergic medications, which can help alleviate symptoms.
Step 4
What is a reflex action?
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A reflex action is an automatic response to a stimulus that occurs without the involvement of the brain.
Step 5
Give one example of a reflex action.
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An example of a reflex action is blinking when something approaches the eye.
Step 6
Suggest an advantage of reflex actions.
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An advantage of reflex actions is that they provide protection by enabling a quick response to potentially harmful stimuli, minimizing injury.
Step 7
Draw a large labelled diagram to show the structures involved in a reflex arc.
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The diagram should include the following structures:
Receptor (or named)
Sensory Neuron
Inter Neuron
Motor Neuron
Effector (or named)
Make sure to label each part clearly.
Step 8
Place arrows on your diagram to show the direction of impulse transmission in the reflex arc.
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Arrows should be drawn to indicate the direction of impulse transmission: from the receptor to the sensory neuron, then to the inter neuron, followed by the motor neuron, and finally to the effector.
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