Textbook Question
What two cell populations make up nervous tissue? What is the function of each?
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Ch. 4 The Tissue Level of Organization
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy and PhysiologyISBN: 9780137854011
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology25
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization29
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure33
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses15
- Ch. 18 The Endocrine System21
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation26
- Ch. 22 The Lymphatic System and Immunity25
- Ch. 23 The Respiratory System4
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes30
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance17
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy and PhysiologyISBN: 9780137854011Not the one you use?Change textbook
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Martini, Nath, Bartholomew 12th EditionCh. 4 The Tissue Level of OrganizationProblem 27
Martini, Nath, Bartholomew 12th EditionCh. 4 The Tissue Level of OrganizationProblem 27Chapter 4, Problem 27
A layer of glycoproteins and a network of fine protein filaments that prevents the movement of proteins and other large molecules from the connective tissue to the epithelium describe
(a) Interfacial canals
(b) The basement membrane
(c) The reticular lamina
(d) Areolar tissue
(e) Squamous epithelium
Verified step by step guidance1
Step 1: Understand the key components described in the problem. The question mentions a layer of glycoproteins and a network of fine protein filaments that act as a barrier preventing the movement of proteins and large molecules from connective tissue to the epithelium.
Step 2: Recall the structure of the basement membrane, which is a specialized extracellular matrix located between the epithelium and connective tissue. It consists of two main layers: the basal lamina (rich in glycoproteins) and the reticular lamina (composed of protein filaments).
Step 3: Identify the function of the basement membrane, which includes acting as a selective barrier that restricts the passage of large molecules and proteins, supporting epithelial cells, and anchoring them to the underlying connective tissue.
Step 4: Compare the options given: (a) Interfacial canals are not related to this barrier function; (c) The reticular lamina is part of the basement membrane but alone does not describe the entire barrier; (d) Areolar tissue is a type of connective tissue, not a barrier layer; (e) Squamous epithelium is a type of epithelial tissue, not a barrier layer between tissues.
Step 5: Conclude that the correct description corresponds to (b) The basement membrane, as it matches both the structural components (glycoproteins and protein filaments) and the functional role of preventing movement of proteins and large molecules from connective tissue to epithelium.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Basement Membrane
The basement membrane is a thin, dense layer of glycoproteins and protein filaments located between the epithelium and connective tissue. It acts as a selective barrier, preventing large molecules and proteins from passing freely, thus maintaining tissue integrity and supporting cell attachment.
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06:01
Characteristic 2: Tightly Pressed Tissue Anchored to Basement Membrane
Glycoproteins and Protein Filaments
Glycoproteins are proteins with carbohydrate groups that contribute to the structural framework of the basement membrane. Protein filaments, such as collagen, form a network that provides mechanical strength and filtration properties, controlling molecular movement between tissues.
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6:26Sliding Filament Theory
Connective Tissue and Epithelium Interface
This interface is where the basement membrane resides, separating connective tissue from epithelial layers. It regulates exchange of substances, supports epithelial cells, and plays a role in tissue repair and regeneration by anchoring cells and filtering molecules.
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08:25Areolar Connective Tissue
Related Practice
Textbook Question
List the similarities and differences among the three types of muscle tissue.
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Textbook Question
List three basic components of connective tissues.
Textbook Question
Why does damaged cartilage heal slowly?
(a) Chondrocytes cannot be replaced if killed, and other cell types must take their place.
(b) Cartilage is avascular, so nutrients and other molecules must diffuse to the site of injury.
(c) Damaged cartilage becomes calcified, thus blocking the movement of materials required for healing.
(d) Chondrocytes divide more slowly than other cell types, delaying the healing process.
(e) Damaged collagen cannot be quickly replaced, thereby slowing the healing process.
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Textbook Question
During a lab practical, a student examines a tissue that is composed of densely packed protein fibers that run parallel to each other and form a cord. There are no striations, but small nuclei are visible. The student identifies the tissue as skeletal muscle. Why is the student's choice wrong, and what tissue is he probably observing?
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Textbook Question
Describe the fluid connective tissues in the human body. What are the main differences between fluid connective tissues and supporting connective tissues?
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