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Questions and Answers
Neurons consist of four parts: dendrites, cell body, axon, and synapse.
False
Most neurons are unipolar, containing one axon and one dendrite.
False
Bipolar neurons have two dendrites and one axon.
False
Axons usually branch extensively at their ends.
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Synapses between neurons only occur between axons and dendrites.
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Signals in neurons are propagated chemically along axons.
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Neurons maintain cell size and osmolarity primarily through the action of Cl- ATPase.
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The resting membrane potential (Em) is always equal to the equilibrium potential for Na+ (ENa).
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Increasing the permeability of the membrane to another ion does not affect the resting membrane potential.
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Neurons use ligand-gated and voltage-gated ion channels to generate mechanical signals.
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The passive spread of electrical signals over short distances requires energy-dependent processes for signal amplification.
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Amplification is not required for long-distance communication down axons to nerve terminals.
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