Human Anatomy: Connective Tissue Quiz

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Questions and Answers

What is the primary function of transitional epithelium?

  • Absorption of nutrients
  • Stretching to allow for distention of an organ (correct)
  • Secretion and movement of mucus by ciliary action
  • Support and cushioning of organs

Which of the following is NOT a characteristic of connective tissue?

  • It consists of cells, ground substance, and fibers.
  • It has a nerve supply, except for cartilage.
  • It is highly vascular, except for cartilage and tendons.
  • It occurs on free surfaces. (correct)

Which type of connective tissue cell is responsible for producing histamine?

  • Mast cells (correct)
  • Fibroblasts
  • Macrophages
  • Plasma cells

What is the function of pseudostratified columnar epithelium?

<p>Secretion and movement of mucus by ciliary action (D)</p> Signup and view all the answers

How do mature connective tissue cells differ from their immature counterparts?

<p>Mature cells are involved in maintaining the matrix. (C)</p> Signup and view all the answers

What is the function of ground substance in connective tissue?

<p>All of the above. (D)</p> Signup and view all the answers

What is the primary function of macrophages in connective tissue?

<p>Phagocytosis of foreign material (A)</p> Signup and view all the answers

Which of the following is NOT a component of ground substance?

<p>Elastin (A)</p> Signup and view all the answers

Where is transitional epithelium found in the body?

<p>Urinary bladder and portions of ureters and urethra (C)</p> Signup and view all the answers

Which type of connective tissue fiber is responsible for providing strength and stretching capacity?

<p>Elastic fibers (B)</p> Signup and view all the answers

What is the main component of the connective tissue matrix?

<p>Ground substance and fibers (B)</p> Signup and view all the answers

Where are collagen fibers found in the body?

<p>A and B only (A)</p> Signup and view all the answers

Reticular fibers are primarily involved in:

<p>All of the above. (D)</p> Signup and view all the answers

What is the main function of adipose tissue?

<p>Storing triglycerides (fat). (A)</p> Signup and view all the answers

Which of the following is a type of loose connective tissue?

<p>Areolar connective tissue (A)</p> Signup and view all the answers

What is the main difference between loose and dense fibrous connective tissue?

<p>All of the above. (D)</p> Signup and view all the answers

What type of tissue provides support and maintains shape, and is found in the epiglottis, auditory tubes, and external ear?

<p>Elastic cartilage (B)</p> Signup and view all the answers

Which of the following is NOT a function of bone tissue?

<p>Contraction for movement (B)</p> Signup and view all the answers

Which type of muscle tissue is striated, multinucleated, and voluntary?

<p>Skeletal (C)</p> Signup and view all the answers

What is the primary function of erythrocytes (red blood cells)?

<p>Oxygen transport (A)</p> Signup and view all the answers

Which of these is a characteristic of smooth muscle tissue?

<p>Spindle-shaped cells (A)</p> Signup and view all the answers

What is the primary role of neuroglia?

<p>Supporting and protecting neurons (D)</p> Signup and view all the answers

Which of the following statements correctly describes the role of dendrites in a neuron?

<p>Dendrites receive signals from other neurons and transmit them to the cell body. (D)</p> Signup and view all the answers

Which of the following is NOT a characteristic of nervous tissue?

<p>Contraction for movement (D)</p> Signup and view all the answers

What is the primary function of reticular connective tissue?

<p>Forms the framework of organs and supports smooth muscle tissue. (C)</p> Signup and view all the answers

Where is dense irregular connective tissue found?

<p>Dermis of the skin, periosteum, perichondrium, and joint capsules. (D)</p> Signup and view all the answers

What is the main component responsible for the resilience of cartilage?

<p>Chondroitin sulfate (A)</p> Signup and view all the answers

Which type of cartilage is found in the embryonic skeleton?

<p>Hyaline cartilage (C)</p> Signup and view all the answers

What is the function of fibrocartilage?

<p>Supports and fuses structures, as seen in the intervertebral discs. (A)</p> Signup and view all the answers

Which of these is a characteristic of dense regular connective tissue?

<p>Forms ligaments and tendons, providing strong attachments. (B)</p> Signup and view all the answers

Which type of connective tissue provides the most strength?

<p>Dense regular connective tissue (A)</p> Signup and view all the answers

Why does cartilage lack blood vessels and nerves?

<p>Its jelly-like matrix prevents the penetration of blood vessels and nerves. (A)</p> Signup and view all the answers

Which type of tissue is responsible for movement within the body?

<p>Muscle tissue (B)</p> Signup and view all the answers

What distinguishes epithelial tissue from other tissue types?

<p>Presence of closely packed cells with little extracellular material (C)</p> Signup and view all the answers

Which of the following is NOT a function of epithelial tissue?

<p>Contraction (A)</p> Signup and view all the answers

What type of epithelial tissue would be most likely found lining the air sacs of the lungs?

<p>Simple squamous epithelium (A)</p> Signup and view all the answers

Which of the following correctly describes the organization of a stratified epithelium?

<p>Multiple layers of cells, with only the basal layer in contact with the basement membrane (D)</p> Signup and view all the answers

How do epithelial tissues receive nutrients?

<p>Through diffusion from underlying connective tissue (C)</p> Signup and view all the answers

What is the primary function of the basement membrane in epithelial tissue?

<p>Provide structural support and attachment (B)</p> Signup and view all the answers

What is the difference between simple and stratified epithelium?

<p>Simple epithelium consists of a single layer of cells, while stratified epithelium consists of multiple layers (C)</p> Signup and view all the answers

What type of epithelium is found lining the heart and blood vessels?

<p>Simple squamous epithelium (B)</p> Signup and view all the answers

What type of epithelium is primarily responsible for the secretion of mucus in the gastrointestinal tract?

<p>Simple columnar nonciliated epithelium (D)</p> Signup and view all the answers

Which type of epithelium is responsible for moving fluids or particles along a passageway by ciliary action?

<p>Simple columnar ciliated epithelium (D)</p> Signup and view all the answers

Where is keratinized stratified squamous epithelium found in the body?

<p>Outer layer of skin (A)</p> Signup and view all the answers

What is the primary function of stratified cuboidal epithelium?

<p>Protection (D)</p> Signup and view all the answers

Which type of epithelium lines the ducts of adult sweat glands?

<p>Stratified cuboidal epithelium (C)</p> Signup and view all the answers

Which type of epithelium is specialized for stretching and distention?

<p>Transitional epithelium (A)</p> Signup and view all the answers

What type of epithelium is found in the uterine tubes?

<p>Simple columnar ciliated epithelium (D)</p> Signup and view all the answers

Flashcards

Transitional Epithelium

A type of epithelium that can stretch and provides distention for the urinary bladder and parts of the ureters and urethra.

Pseudostratified Columnar Epithelium

A type of epithelium that appears stratified but is a single layer, aiding in secretion and movement of mucus.

Ciliated Columnar Epithelium

A variety of pseudostratified epithelium with cilia and goblet cells that lines the upper respiratory tract.

Connective Tissue

The most abundant tissue in the body, consisting of cells, ground substance, and fibers forming a matrix.

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Connective Tissue Matrix

The material between connective tissue cells that can be fluid to solid, determining the tissue's characteristics.

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Immature Connective Tissue Cells

Cells ending in -blast (like osteoblast) that produce the matrix; they are active in forming new tissue.

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Mature Connective Tissue Cells

Cells ending in -cyte (like osteocyte) that maintain the matrix and have reduced energy needs.

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Types of Connective Tissue Cells

Includes fibroblasts, macrophages, plasma cells, mast cells, adipocytes, and leukocytes, each with specific roles.

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Ground Substance

The gel-like material in connective tissue that supports and binds cells.

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Fibers in Connective Tissue

Structures providing strength and support; include collagen, elastic, and reticular fibers.

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Collagen Fibers

Strong fibers made of collagen, resistant to stretching; found in bone and cartilage.

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Elastic Fibers

Fibers made of elastin that allow stretching; found in skin and blood vessels.

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Reticular Fibers

Thin fibers made of collagen and glycoprotein providing support in soft organs.

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Loose Connective Tissue

Connective tissue with loosely woven fibers and abundant cells; found in various tissues.

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Adipose Tissue

Connective tissue made of adipocytes for storing triglycerides (fat).

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Mature Connective Tissue

Connective tissue types that don't change after birth; includes proper, cartilage, bone, and blood.

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Functions of adipose tissue

Reduces heat loss, serves as energy reserve, and protects.

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Reticular connective tissue

Composed of fine reticular fibers; found in organs like liver and spleen.

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Dense regular connective tissue

Contains thick, regularly arranged collagen fibers; forms tendons and ligaments.

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Dense irregular connective tissue

Contains randomly arranged collagen fibers; provides strength in various locations.

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Elastic connective tissue

Contains elastic fibers; allows stretching of organs like lungs and arteries.

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Cartilage

Jellylike matrix with collagen and elastic fibers; lacks blood vessels and nerves.

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Hyaline cartilage

Most common type; contains fine collagen fibers; found in joints, nose, and skeleton.

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Fibrocartilage

Contains bundles of collagen; found in pubic symphysis and intervertebral discs; provides support.

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Histology

The study of tissues and their structures.

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Epithelial Tissue

Covers body surfaces and lines organs/cavities.

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Muscle Tissue

Responsible for body movement and contractions.

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Nervous Tissue

Initiates and transmits nerve impulses for coordination.

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General Features of Epithelia

Consists of closely packed cells with a high regeneration capacity.

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Layer Types of Epithelium

Can be simple, stratified, or pseudostratified based on layering.

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Cell Shapes of Epithelia

Includes squamous, cuboidal, columnar, and transitional shapes.

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Elastic Cartilage

A type of cartilage with elastic fibers providing shape support.

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Bone Tissue

A rigid tissue with a matrix of mineral salts and collagen, housing osteocytes.

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Blood Composition

Liquid matrix plasma with formed elements like erythrocytes and leukocytes.

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Skeletal Muscle

Striated, multinucleated muscle tissue attached to bones and under voluntary control.

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Cardiac Muscle

Striated and branched muscle tissue forming the heart wall, involuntary control.

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Smooth Muscle

Non-striated, spindle-shaped muscle found in hollow organs, usually involuntary.

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Neurons

Nerve cells that transmit impulses, consisting of a cell body, dendrites, and axons.

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Neuroglia

Supportive cells in the nervous system that protect neurons.

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Simple Squamous Epithelium

A single layer of flat cells adapted for diffusion and filtration.

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Endothelium

The layer formed by simple squamous epithelium lining the heart and blood vessels.

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Mesothelium

Layer of simple squamous epithelium lining thoracic and abdominal cavities.

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Simple Cuboidal Epithelium

A single layer of cube-shaped cells involved in secretion and absorption.

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Simple Columnar Nonciliated Epithelium

A layer of nonciliated rectangular cells aiding in secretion and absorption in the gastrointestinal tract.

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Stratified Squamous Epithelium

Multiple layers of flat cells; protective function, keratinized in skin.

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Stratified Cuboidal Epithelium

Several layers of cube-shaped cells functioning in protection, found in sweat glands ducts.

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Stratified Columnar Epithelium

Several layers of cells with a top layer of rectangles involved in protection and secretion.

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Study Notes

Histology - Types of Tissues

  • A tissue is a group of similar cells with a common embryological origin and specialized function.
  • Histology is the study of tissues.
  • Four main tissue types: epithelial, connective, muscular, and nervous.

Epithelial Tissues

  • Covers and lines body surfaces, organs, cavities, and ducts.
  • Closely packed cells with minimal extracellular material.
  • Arranged in sheets (single or multiple layers).
  • Apical (free) surface and basal (bottom) surface connected to a basement membrane.
  • Avascular (exchange occurs via diffusion).
  • Cell junctions secure attachments.
  • High capacity for regeneration (high mitotic rate).
  • Functions: protection, filtration, secretion, absorption, excretion.

Covering and Lining Epithelium

  • Arrangement reflects location and function.
  • Classified by layers (simple, stratified, pseudostratified) and cell shapes (squamous, cuboidal, columnar, transitional).

Connective Tissues

  • Most abundant tissue type.
  • Cells, ground substance, and fibers (matrix).
  • Not exposed to free surfaces.
  • Highly vascular (except cartilage and tendons).
  • Matrix composition affects tissue qualities, secreted by cells.

Connective Tissue Cells

  • Immature cells (e.g., osteoblasts) form and secrete matrix.
  • Mature cells (e.g., osteocytes) maintain matrix.
  • Types include: fibroblasts, macrophages, plasma cells, mast cells, adipocytes, and white blood cells.

Connective Tissue Matrix

  • Ground substance and fibers fill spaces between cells.
  • Ground substance components: hyaluronic acid, chondroitin sulfate, dermatan sulfate, and keratan sulfate.
  • Function of ground substance: support, exchange, influence cell function.
  • Fiber types: collagen (strong, flexible), elastic (stretchable), reticular (support).

Mature Connective Tissues

  • Loose fibrous connective tissue (e.g., areolar tissue): contains all 3 fiber types, cells, and semifluid ground substance. Supports, elasticity, and strength. Found in subcutaneous layer and mucous membranes.
  • Adipose tissue (fat): Adipocytes store triglycerides; insulates, provides energy reserves, supports, and cushions. Found in subcutaneous layer.
  • Dense fibrous connective tissue: densely packed fiber bundles. Provides strength; found in tendons, ligaments, fasciae.
  • Cartilage: avascular matrix of ground substance and fibers with chondrocytes. Provides flexible support. Types: hyaline (most common), elastic, fibrocartilage.
  • Bone (osseous tissue): Hard matrix of calcium salts and collagen fibers. Support, protection, houses blood forming tissue, mineral storage.
  • Blood (vascular tissue): Liquid matrix (plasma) and formed elements (erythrocytes, leukocytes, thrombocytes). Transport, phagocytosis, immunity, and clotting.

Muscle Tissues

  • Specialized for contraction. Provides motion and posture, heat production.
  • Types: skeletal (striated, multinucleated, voluntary), cardiac (striated, uninucleated, involuntary, pumps blood), and smooth (non-striated, uninucleated, involuntary, internal organs).

Nervous Tissue

  • Neurons and neuroglia.
  • Neurons (nerve cells) are sensitive to stimuli, convert them into nerve impulses, and conduct nerve impulses to other neurons, muscles, or glands.

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