A Node of Ranvier (Myelin Sheath Gap)

question 11

Multiple Choice

A node of Ranvier (myelin sheath gap)

• A) occurs only in ganglia.
• B) is one segment of the myelin sheath.
• C) occurs in the PNS but not in the CNS.
• D) is a bare region of axonal membrane in myelinated axons only.

---

Definitions:

Blood Smear

A laboratory test procedure that involves spreading a thin layer of blood on a microscope slide for the purpose of examining blood cells under a microscope.

Eosinophils

A type of white blood cell that plays a key role in the body's immune response, especially in combating parasitic infections and in allergic reactions.

Neutrophils

A type of white blood cell that is part of the immune system, responsible for much of the body's protection against infection by engulfing and destroying bacteria and foreign particles.

Hematocrit Value

A measurement of the proportion of blood volume that is occupied by red blood cells, used to assess overall blood health.