The diagram shows a motor neuron from an adult - Scottish Highers Human Biology - Question 10 - 2023
Question 10
The diagram shows a motor neuron from an adult.
(a)
(i) Name structure X.
(ii) State why it is important that structure X is insulated by the myelin sheath.
(iii... show full transcript
Worked Solution & Example Answer:The diagram shows a motor neuron from an adult - Scottish Highers Human Biology - Question 10 - 2023
Step 1
Name structure X.
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Answer
Structure X is known as the axon.
Step 2
State why it is important that structure X is insulated by the myelin sheath.
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Insulation by the myelin sheath is crucial because it increases the speed of impulses traveling along the axon, allowing for more efficient transmission of electrical signals.
Step 3
Name the type of cell that produces the myelin sheath.
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The type of cell that produces the myelin sheath is called a glial cell.
Step 4
Explain how the structure of motor neurons causes a one year old child to be less coordinated than an adult.
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A one year old child has less developed motor neurons, which are often incomplete or less myelinated, leading to slower impulse transmission. This slows down their response times and affects their ability to control muscles, making coordination less effective compared to an adult.
Step 5
State one advantage of neurons being arranged in a diverging pathway.
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An advantage of neurons being arranged in a diverging pathway is that it allows for more than one muscle or effector to be stimulated, facilitating fine motor control and coordinated movement.
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