How fiber diameter and the presence or absence of myelin affect the conduction speed of a nerve fiber. Introduction: The nerve fiber is insulated by a spiral layer called myelin, which is produced in both central nervous system (CNS) and peripheral nervous system (PNS). The formation of myelin is called myelination or myelinogenesis. Schwann cells spiral a single nerve fiber repeatedly forming hundred compact layers without cytoplasm between the plasma membrane. These layers form the myelin sheath. This myelin sheath is absent in unmyelinated nerve cells. Each gap between adjacent Schwann cells in the myelin sheath of a neuron is called as nodes of Ranvier or myelin sheath gap.

Question

Want to see the full answer?

Answer 1

Question

Chapter 12.3, Problem 3AYLO

Summary Introduction

To discuss:

How fiber diameter and the presence or absence of myelin affect the conduction speed of a nerve fiber.

Introduction:

The nerve fiber is insulated by a spiral layer called myelin, which is produced in both central nervous system (CNS) and peripheral nervous system (PNS). The formation of myelin is called myelination or myelinogenesis. Schwann cells spiral a single nerve fiber repeatedly forming hundred compact layers without cytoplasm between the plasma membrane. These layers form the myelin sheath. This myelin sheath is absent in unmyelinated nerve cells. Each gap between adjacent Schwann cells in the myelin sheath of a neuron is called as nodes of Ranvier or myelin sheath gap.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

How one action potential triggers another; how the continuous conduction seen in unmyelinated nerve fibers result from a chain reaction of action potentials; and what normally prevents the signal from traveling backward to the neurosoma.

Difference between impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre.

How stimulation of a neuron generates a local potential; the physiological properties of a local potential.

Answer 2

Question

Chapter 12.3, Problem 3AYLO

Summary Introduction

To discuss:

How fiber diameter and the presence or absence of myelin affect the conduction speed of a nerve fiber.

Introduction:

The nerve fiber is insulated by a spiral layer called myelin, which is produced in both central nervous system (CNS) and peripheral nervous system (PNS). The formation of myelin is called myelination or myelinogenesis. Schwann cells spiral a single nerve fiber repeatedly forming hundred compact layers without cytoplasm between the plasma membrane. These layers form the myelin sheath. This myelin sheath is absent in unmyelinated nerve cells. Each gap between adjacent Schwann cells in the myelin sheath of a neuron is called as nodes of Ranvier or myelin sheath gap.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 3

Question

Chapter 12.3, Problem 3AYLO

Summary Introduction

To discuss:

How fiber diameter and the presence or absence of myelin affect the conduction speed of a nerve fiber.

Introduction:

The nerve fiber is insulated by a spiral layer called myelin, which is produced in both central nervous system (CNS) and peripheral nervous system (PNS). The formation of myelin is called myelination or myelinogenesis. Schwann cells spiral a single nerve fiber repeatedly forming hundred compact layers without cytoplasm between the plasma membrane. These layers form the myelin sheath. This myelin sheath is absent in unmyelinated nerve cells. Each gap between adjacent Schwann cells in the myelin sheath of a neuron is called as nodes of Ranvier or myelin sheath gap.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 12.3, Problem 3AYLO

Summary Introduction

To discuss:

How fiber diameter and the presence or absence of myelin affect the conduction speed of a nerve fiber.

Introduction:

The nerve fiber is insulated by a spiral layer called myelin, which is produced in both central nervous system (CNS) and peripheral nervous system (PNS). The formation of myelin is called myelination or myelinogenesis. Schwann cells spiral a single nerve fiber repeatedly forming hundred compact layers without cytoplasm between the plasma membrane. These layers form the myelin sheath. This myelin sheath is absent in unmyelinated nerve cells. Each gap between adjacent Schwann cells in the myelin sheath of a neuron is called as nodes of Ranvier or myelin sheath gap.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

Chapter 12.3, Problem 3AYLO

Summary Introduction

To discuss:

How fiber diameter and the presence or absence of myelin affect the conduction speed of a nerve fiber.

Introduction:

The nerve fiber is insulated by a spiral layer called myelin, which is produced in both central nervous system (CNS) and peripheral nervous system (PNS). The formation of myelin is called myelination or myelinogenesis. Schwann cells spiral a single nerve fiber repeatedly forming hundred compact layers without cytoplasm between the plasma membrane. These layers form the myelin sheath. This myelin sheath is absent in unmyelinated nerve cells. Each gap between adjacent Schwann cells in the myelin sheath of a neuron is called as nodes of Ranvier or myelin sheath gap.

Answer 6

Chapter 12.3, Problem 3AYLO

Summary Introduction

To discuss:

How fiber diameter and the presence or absence of myelin affect the conduction speed of a nerve fiber.

Introduction:

The nerve fiber is insulated by a spiral layer called myelin, which is produced in both central nervous system (CNS) and peripheral nervous system (PNS). The formation of myelin is called myelination or myelinogenesis. Schwann cells spiral a single nerve fiber repeatedly forming hundred compact layers without cytoplasm between the plasma membrane. These layers form the myelin sheath. This myelin sheath is absent in unmyelinated nerve cells. Each gap between adjacent Schwann cells in the myelin sheath of a neuron is called as nodes of Ranvier or myelin sheath gap.

Answer 7

Chapter 12.3, Problem 3AYLO

Summary Introduction

To discuss:

How fiber diameter and the presence or absence of myelin affect the conduction speed of a nerve fiber.

Introduction:

The nerve fiber is insulated by a spiral layer called myelin, which is produced in both central nervous system (CNS) and peripheral nervous system (PNS). The formation of myelin is called myelination or myelinogenesis. Schwann cells spiral a single nerve fiber repeatedly forming hundred compact layers without cytoplasm between the plasma membrane. These layers form the myelin sheath. This myelin sheath is absent in unmyelinated nerve cells. Each gap between adjacent Schwann cells in the myelin sheath of a neuron is called as nodes of Ranvier or myelin sheath gap.

Answer 8

Expert Solution & Answer

Answer 9

Expert Solution & Answer

Answer 10

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 11

Ch. 12.1 - What is a receptor? Give two examples of...Ch. 12.1 - Distinguish between the central and peripheral...Ch. 12.1 - Prob. 3BYGO Ch. 12.1 - What the nervous and endocrine systems have in...Ch. 12.1 - Three fundamental functions of the nervous system;...Ch. 12.1 - Differences between the central nervous system...Ch. 12.1 - The autonomic nervous system and its two divisions Ch. 12.2 - Sketch a multipolar neuron and label its...Ch. 12.2 - Explain the differences between a sensory neuron,...Ch. 12.2 - Prob. 6BYGO

Solution Summary: The author explains how the nerve fiber is insulated by a spiral layer called myelin, which is produced in both the central and peripheral nervous systems. The speed of conduction is determined by the distance between adjacent Schwann

Videos

Want to see the full answer?

Chapter 12 Solutions