attacks Some disease, such as multiple sclerosis (MS), occur when the immune sys
ID: 3509752 • Letter: A
Question
attacks Some disease, such as multiple sclerosis (MS), occur when the immune system compromises the function of myelin. Use your understanding of myelinated axon conduction to explain the following symptoms of multiple sclerosis: muscle weakness problems maintaining balance while walking, and blurred vision. and 1. 2. A: A large quantity of K' ions are added to the extracellular fluid of a neuron. The neuron is then stimulated to generate an action potential. During this action potential, how will the addition of K to the extracellular fluid influence the repolarization and hyperpolarization phases of the action potential? Explain. B: Following this action potential, how will the neuron's resting membrane potential compare to its resting membrane potential prior to the addition of K? C: How will the addition of K' to the extracellular fluid affect the neuron's overall function? Why? (Hint: Injections of potassium chloride solution are lethal).Explanation / Answer
1 Due to demyelenation in spinal cord and brain muscle weakness occurs.
Lesion in basal ganglia leads to problem with balance.
Inflammation of optic nerve leads to blurred vision
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