A nerve impulse triggers events at a synapse or junction that
A)usually connect the cell bodies of two neurons directly.
B)transfer information either to another neuron or to an effector cell.
C)continue to respond only if it is myelinated.
D)are always inhibitory unless followed by similar impulses.
E)None of the answers are correct.

Question

Quizplus · Accepted Answer

A nerve impulse triggers events at a synapse or junction that transfer information either to another neuron or to an effector cell. Synapses or junctions are the structures where two neurons meet, and communication happens between them. This communication is usually in the form of chemical signals called neurotransmitters, which are released by the presynaptic neuron and bind to receptors on the postsynaptic neuron or effector cell. Thus, option B is the correct answer. Options A, C, and D are incorrect because synapses can occur at different sites, are not always myelinated, and can be either excitatory or inhibitory depending on the neurotransmitter released.

A Nerve Impulse Triggers Events at a Synapse or Junction