Question

bio1130 exam 3 - chapters 10 and 11 nervous syst what is convergence? multiple choice dendrites from the same neuron touch each other dendrites from neurons in different parts of the nervous system contact the same neuron a neuroglial cell contacts many neurons axons from neurons in different parts of the nervous system contact the same neuron

Explanation:

In the context of neural convergence, convergence refers to the process where multiple input neurons (from different regions of the nervous system) synapse onto a single postsynaptic neuron. Let's analyze each option:

• "Dendrites from the same neuron touch each other" is incorrect as dendrites of the same neuron touching isn't related to convergence.
• "Dendrites from neurons in different parts of the nervous system contact the same neuron" is incorrect because convergence involves axons (not dendrites) of different neurons connecting to the same neuron.
• "A neuroglial cell contacts many neurons" is incorrect as neuroglial cells (like astrocytes, oligodendrocytes) have supportive roles and their contact with neurons isn't convergence.
• "Axons from neurons in different parts of the nervous system contact the same neuron" is correct as it matches the definition of neural convergence (multiple inputs from different sources onto one neuron).

Answer:

Axons from neurons in different parts of the nervous system contact the same neuron