Which nerve fiber conducts action potentials the most rapidly?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all

Explore the BOC Domain 4 Therapeutic Modalities Test. Engage with multiple-choice questions and in-depth explanations to fully grasp treatment and rehab topics. Prepare effectively!

Multiple Choice

Which nerve fiber conducts action potentials the most rapidly?

Explanation:
Conduction velocity depends mainly on myelination and axon diameter. Heavily myelinated, large-diameter fibers enable rapid saltatory conduction, so they transmit signals fastest. Among the options, the A fiber has the largest diameter and is well myelinated, giving the highest conduction speed. A-delta fibers are smaller and only moderately fast, B fibers are myelinated but smaller than A fibers, and C fibers are unmyelinated and slowest. Thus, the fastest conduction occurs in the A fiber.

Conduction velocity depends mainly on myelination and axon diameter. Heavily myelinated, large-diameter fibers enable rapid saltatory conduction, so they transmit signals fastest. Among the options, the A fiber has the largest diameter and is well myelinated, giving the highest conduction speed. A-delta fibers are smaller and only moderately fast, B fibers are myelinated but smaller than A fibers, and C fibers are unmyelinated and slowest. Thus, the fastest conduction occurs in the A fiber.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy