Laboratory Manual For Human Anatomy & Physiology
4th Edition
ISBN: 9781260159363
Author: Martin, Terry R., Prentice-craver, Cynthia
Publisher: McGraw-Hill Publishing Co.
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Textbook Question
Chapter 28, Problem 1PL
The ____________ is the most superficial membrane o(the meninges.
a. subarachnoid space
b. piamater
c. arachnoid mater
d. duramater
Expert Solution & Answer
Summary Introduction
Introduction:
Meninges covers and protects the brain and spinal cord. It is made of three layers in mammals which are dura mater, arachnoid mater and pia mater. Cerebrospinal fluid is present between arachnoid mater and pia mater.
Answer to Problem 1PL
Correct answer:
The correct answer is option (d) dura mater.
Explanation of Solution
Explanation/justification for the correct answer:
Option (d) dura mater. Dura mater is the outermost superficial layer of meninges. It lies just next to the skull and vertebrae. It is loosely arranged with many extracellular spaces. It is a sac-like structure and envelops arachnoid mater. So, the correct answer is option (d).
Explanation for incorrect answer:
Option (a) subarachnoid space. It is the space between arachnoid mater and pia mater. It contains cerebrospinal fluid. This fluid cushions the brain and spinal cord. So, this is an incorrect option.
Option (b) pia mater. It is the third and innermost layer of meninges. It is a thin membrane that attaches to the brain and spinal cord. So, this is an incorrect answer.
Option (c) arachnoid mater. It is the second and middle layer of meninges. It is a thin membrane and the cells are tightly packed so that there is no leakage of fluid. So, this is an incorrect answer.
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Chapter 28 Solutions
Laboratory Manual For Human Anatomy & Physiology
Ch. 28 - The ____________ is the most superficial membrane...Ch. 28 - The inferior end of the adult spinal cord...Ch. 28 - Prob. 3PLCh. 28 - Which of the following is not part of the gray...Ch. 28 - The central canal of the spinal cord is located...Ch. 28 - The brachial plexus is formed from components of...Ch. 28 - There are eight pairs of cervical spinal nerves....Ch. 28 - The major ascending (sensory) and descending...Ch. 28 - Match the terms in column A with the descriptions...Ch. 28 - Prob. F28.14A
Ch. 28 - The spinal cord gives rise to 31 pairs...Ch. 28 - The bulge in the spinal cord that gives off nerves...Ch. 28 - The bulge in the spinal cord that gives off nerves...Ch. 28 - The ______________ is a groove that extends the...Ch. 28 - In a spinal cord cross section, the posterior...Ch. 28 - The axons of motor neurons are found in the...Ch. 28 - The _______________ connects the gray matter on...Ch. 28 - The _______ in the gray commissure of the spinal...Ch. 28 - The white matter of the spinal cord is divided...Ch. 28 - There are ______________________ pairs of cervical...Ch. 28 - There are ______________________ pairs of sacral...Ch. 28 - Cervical spinal nerve pair C1 originates between...Ch. 28 - Spinal nerves L4 through S4 form a...Ch. 28 - The gray matter of the spinal cord is divided into...Ch. 28 - The spinal cord ends just inferior to L1 in a...Ch. 28 - Severing the ______________________ nerves of the...Ch. 28 - The inferior and superior gluteal nerves of the...Ch. 28 - To block chronic pain in a patient, sometimes...Ch. 28 - Prob. 4.2ACh. 28 - Injuries to the vertebral column and spinal cord...Ch. 28 - Why are intramuscular injections given in the...Ch. 28 - Prob. 4.2CT
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