The speed of impulse conduction along an axon may be increased by
A)a myelin sheath.
B)a graded potential.
C)neurotransmitters.
D)effector cells.

Question

Quizplus · Accepted Answer

Myelin sheath provides insulation to axons and increases the speed of impulse conduction by allowing the action potential to jump from one node of Ranvier to another, rather than traveling the entire length of the axon. Graded potentials, neurotransmitters, and effector cells do not directly affect the speed of impulse conduction.

The Speed of Impulse Conduction Along an Axon May Be