Laboratory Manual for Anatomy and Physiology, 6e Loose-Leaf Print Companion
Laboratory Manual for Anatomy and Physiology, 6e Loose-Leaf Print Companion
6th Edition
ISBN: 9781119304142
Author: Connie Allen, Valerie Harper
Publisher: WILEY
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Chapter 18, Problem 1.1BGL
Summary Introduction

To label: The structures given in Fig 18.1

Concept introduction: Neurons are the fundamental functioning units of the nervous system. Neurons share many similar features with other body cells; only one different feature is that they can conduct signals throughout the body.

Expert Solution
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Answer to Problem 1.1BGL

Pictorial representation:

Laboratory Manual for Anatomy and Physiology, 6e Loose-Leaf Print Companion, Chapter 18, Problem 1.1BGL , additional homework tip  1

Fig 1: Transverse section displaying the coverings of a spinal nerve

Explanation of Solution

The spinal nerves function like “telephone lines” and bring back and forth messages between the body and the spinal cord to regulate motions as well as sensations. There are two roots in each spinal nerve; they are the ventral root and the dorsal root. An axon is a lengthy, slender projection that emerges from a nerve cell. The myelin sheath is formed of a fatty material that surrounds the nerve cells.

The dense and uneven connective tissue that surrounds the peripheral nerves is termed as the epineurium. This tissue envelops several blood vessels that supply blood to the nerves and nerve fascicles. The epineurium is abundantly seen in the regions of joints. Hence, they protect the nerves from injury as well as stretching.

A nerve fascicle is otherwise known as fasciculus. This structure is formed of a bundle of axons. These fascicles are present in the peripheral nervous system. They are bundled together with the blood vessels and fatty tissues.

Nerve fascicles are enveloped by a kind of connective tissue that is termed as the perineurium. The perineurium is formed of perineurial cells, and they are also referred to as myoepithelioid in some cases. The perineurium membrane is a smooth, tube-like transparent structure that could be easily detached from the fibers which it surrounds.

The connective tissue that surrounds the unmyelinated and myelinated axons is called the endoneurium. The endoneurium is otherwise known as the endoneurial channel or Henle’s sheath. It is delicate and surrounds the myelin sheath of every myelinated nerve fiber. The endoneurium is made up of endoneurial cells.

Summary Introduction

To label: The structures given in Fig 18.2

Expert Solution
Check Mark

Answer to Problem 1.1BGL

Pictorial representation:

Laboratory Manual for Anatomy and Physiology, 6e Loose-Leaf Print Companion, Chapter 18, Problem 1.1BGL , additional homework tip  2

Fig 2: A transverse section photomicrograph through a spinal nerve fascicle

Explanation of Solution

An axon is a long, slim projection that emerges from a neuron. The myelin sac consists of a fat material that surrounds the cells of the nerves. The endoneurium is also known as the Henle’s sheath or endoneurial channel. It is fragile and surrounds every myelinated nerve fiber’s sheath. The endoneurium consists of endoneurial cells.

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Chapter 18 Solutions

Laboratory Manual for Anatomy and Physiology, 6e Loose-Leaf Print Companion

Ch. 18 - Prob. 2RSNCh. 18 - _______________ Branch that forms nerves serving...Ch. 18 - _______________ femoral Ch. 18 - _______________ sciatic n. Ch. 18 - Prob. 3MNNPCh. 18 - _______________ ulnar Ch. 18 - _______________ axillary n. Ch. 18 - _______________ tibial n. Ch. 18 - _______________ obturator n. Ch. 18 - _______________ radial n. Ch. 18 - _______________ common fibular n. Ch. 18 - _______________ pudendal n. Ch. 18 - Prob. 1SNCh. 18 - and the __________ Ch. 18 - There are ______ pairs of spinal nerves. Ch. 18 - The nerve that supplies the posterior thigh...Ch. 18 - There is (are) ______ pair(s) of coccygeal...Ch. 18 - If the anterior (ventral) ramus of a spinal nerve...Ch. 18 - Prob. 7SNCh. 18 - The nerve that supplies the anterior thigh is the...Ch. 18 - There is (are) _____ pair(s) of sacral nerves. Ch. 18 - Prob. 10SNCh. 18 - If the posterior (dorsal) ramus of a spinal nerve...Ch. 18 - There is (are) ______ pair(s) of cervical...Ch. 18 - The _____________ nerve supplies the deltoid and...Ch. 18 - The _____________ nerve supplies the triceps...Ch. 18 - The _____________ nerve supplies the biceps...Ch. 18 - The _____________ nerve supplies the diaphragm. Ch. 18 - The _____________ nerve supplies most hand...Ch. 18 - The _____________ nerve supplies the flexor carpi...Ch. 18 - Transverse section of a spinal nerve with...Ch. 18 - Transverse section of a spinal nerve with...Ch. 18 - Transverse section of a spinal nerve with...Ch. 18 - Transverse section of a spinal nerve with...Ch. 18 - Transverse section of a spinal nerve with...Ch. 18 - Transverse section of a spinal nerve with...Ch. 18 - Major nerves from the cervical and brachial...Ch. 18 - Major nerves from the cervical and brachial...Ch. 18 - Major nerves from the cervical and brachial...Ch. 18 - Major nerves from the cervical and brachial...Ch. 18 - Major nerves from the cervical and brachial...Ch. 18 - Major nerves from the cervical and brachial...Ch. 18 - ______________________________________________ Ch. 18 - ____________________________________________ Ch. 18 - ____________________________________________ Ch. 18 - _____________________________________________ Ch. 18 - ...Ch. 18 - ________________________________________________ Ch. 18 - __________ A broken forearm resulted in an...Ch. 18 - __________ An injection into the shoulder results...Ch. 18 - __________ Health care professionals are taught...Ch. 18 - __________ Hitting the medial epicondyle results...Ch. 18 - _______________________ John Jones injured his...Ch. 18 - _______________________ Following the birth of her...Ch. 18 - _______________________ Charles broke his leg...Ch. 18 - __________ Greenstick fracture of the tibia Ch. 18 - __________ Sunburn on the skin over deltoid...Ch. 18 - Prob. 10UYK
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