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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, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089
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TOC.tableOfContents
- Ch. 1 An Introduction to Anatomy and Physiology26
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization30
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure36
- 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 Senses16
- Ch. 18 The Endocrine System20
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation29
- Ch. 22 The Lymphatic System and Immunity31
- Ch. 23 The Respiratory System12
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes32
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance23
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Non è quello che usi tu?Cambia libro di testo
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Martini, Nath, Bartholomew 11th EditionCh. 4 The Tissue Level of OrganizationProblema 28
Martini, Nath, Bartholomew 11th EditionCh. 4 The Tissue Level of OrganizationProblema 28Capitolo 4, Problema 28
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.
Guida verificata passo dopo passo1
Understand that cartilage is a type of connective tissue that provides support and cushioning in joints and other areas.
Recall that cartilage is avascular, meaning it lacks blood vessels, which limits the direct supply of nutrients and oxygen to the tissue.
Recognize that because of this avascularity, nutrients and waste products must move by diffusion through the matrix to reach chondrocytes, the cells responsible for maintaining cartilage.
Realize that diffusion is a slower process compared to direct blood supply, which slows down the delivery of essential molecules needed for repair and healing.
Conclude that the slow healing of damaged cartilage is primarily due to its avascular nature, making option (b) the correct explanation.
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Avascular Nature of Cartilage
Cartilage lacks blood vessels, meaning it does not receive direct blood supply. Nutrients and oxygen must diffuse through the dense extracellular matrix to reach chondrocytes, which slows down metabolic processes and delays healing after injury.
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Role of Chondrocytes in Cartilage Repair
Chondrocytes are the specialized cells responsible for maintaining and repairing cartilage. Their limited ability to proliferate and replace damaged cells contributes to the slow healing process in cartilage tissue.
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Extracellular Matrix Composition and Repair
Cartilage's extracellular matrix, rich in collagen and proteoglycans, provides structural support but is slow to regenerate. Damage to collagen fibers impairs the matrix's integrity, and their slow replacement further delays cartilage repair.
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03:20DNA Repair
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