Deteriorating Changes in the Distal Segment of an Axon as a Result

question 20

Multiple Choice

Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma iscalled ________ degeneration.

• A) neural
• B) central
• C) peripheral
• D) Wallerian
• E) conduction

---

Definitions:

Sperm

Male reproductive cells designed for fertilization of the female ovum, contributing half of the genetic information to the offspring.

Egg

A reproductive cell produced by female organisms, capable of developing into a new individual upon fertilization.

Endoderm

Innermost primary tissue layer of an animal embryo that gives rise to the linings of the digestive tract and associated structures.

Germ Layer

Primary tissue layer of a vertebrate embryo—namely, ectoderm, mesoderm, or endoderm.