A Nerve Impulse Travels About __________ Times Faster When It

question 21

Multiple Choice

A nerve impulse travels about __________ times faster when it leaps between nodes of Ranvier than when it travels along an unmyelinated axon.

• A) 5
• B) 10
• C) 20
• D) 100
• E) 50

---

Definitions:

Fetal Period

A stage of human development that begins at the end of the tenth week of gestation and continues until birth, characterized by rapid growth and maturation of bodily structures.

Recessive Gene

A gene that can be masked by a dominant gene and is expressed in the phenotype only when both alleles are recessive.

Phenotype

A group of traits in a person that are visible and come about through the way their genetic makeup responds to environmental factors.

X Chromosome

One of the two sex chromosomes, commonly associated with female sex determination in many organisms.