Which Statement About the Process of Summation in a Neuron

question 25

Multiple Choice

Which statement about the process of summation in a neuron is false?

• A) Slight perturbations of the membrane potential spread across the postsynaptic cell body.
• B) The concentration of voltage-gated sodium channels is highest in the dendrites of the postsynaptic cell.
• C) Spatial summation adds up the simultaneous influences of synapses at different locations on the postsynaptic cell.
• D) Axons that terminate closer to the axon hillock have more influence on the summation process than those that do not.
• E) The process is essentially a comparison of all the excitatory and inhibitory postsynaptic inputs.

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Definitions:

Ability

The possession of the means or skill to do something.

Sarcoplasmic Reticulum

A specialized type of smooth endoplasmic reticulum found in muscle cells, involved in the regulation of calcium ions.

Sarcoplasm

The cytoplasm within a muscle cell, containing organelles, proteins, and the substances required for muscle contraction.

Sarcomere

The basic contractile unit of muscle fiber, consisting of actin and myosin filaments between two Z-lines in striated muscle cells.