Question

Axons of A alpha neurons conduct action potentials faster than any other type of neuron. Which of the following would account for their rapid conductance?thick diameter, myelinated

Answer 1

Answer: thick diameter, myelinated are needed for faster signal propagations.

Step-by-step explanation:

These are the largest neuron in the spinal cord. Based on structure their axons are large , myelinated( surrounded with deposits of myelin sheath)and multipolar(many dendrites) .

These structures are related to their functions, thus the big size is related to large diameter of the axon, while the multipolarity for integration of information from multiple neurons need myelinated axons for fast sultatory conduction during receptions of sensory inputs

Their major function is innervation of muscles fibre that are concerned with muscle contraction, where they form motor unit thus reasons for above characteristics.

Therefore Myelinated to allow fast salutatory conduction velocity of range of 80-120 m/s for action potential

and

large diameter of 13-20 micro meter which offers little resistance to flow of action potential are the correct answers

Answer 2

Thick diameter, Myelinated

Step-by-step explanation:

A alpha neurons conduct action potentials faster because of their large axon diameter and myelin.

• The large diameter is less resistant to the flow of ions and allows for faster conductivity.
• The myelin sheath is a layer of fat acting as to insulate the axon which helps increase signal conductance.