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Chapter 3 - Tissues and Early Embryology (Exam I)

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  • List the 4 general tissue types


    Epithelial

    Connective

    Muscle

    Nervous

  • ___ is the study of tissues


    histology

  • An epithelium is a ____ of cells that covers exposed surfaces and lines internal cavities and passageways


    sheet

  • Is the epithelial an avascular or vascular sheet of cells? does it have a lot of nerves?


    avascular

    yes

  • How does the epithelium stay alive?


    overlying and underlying connective tissue

  • What are the functions of epithelial tissue


    provide physical protection

    control permeability

    provide sensation

    provide secretions, not excretions

  • What are the 3 specializations of epithelial cells (apical features)


    microvilli

    sterococilia

    ciliated epithelium

  • Function of microvilli


    increased SA of epithelium

  • Function of ciliated epithelium


    cilia on apical surface beat together to move mucous/pathogens

  • What is stercocilia


    long microvilli that don't move (found in male reproductive parts and inner ear)

  • how does the epithelium maintain it's integrity


    intercellular connections give it strength/stability

    attachment to the basal lamina (between epithelium and underlying connective tissue)

    epithelial maintenance and renewal is self-perpetuated

  • What are the classifications of epithelia


    Layers: simple or stratified

    Shapes: squamous, cuboid, transitional, columnar

  • what part of a stratified epithelium do you look at to classify its shape


    surface

  • which epithelial shape has circular nucleli


    cuboid

  • which epithelial shape looks like a fried egg


    squamous

  • which epithelial shape is rare


    cuboid

  • which epithelial shape has egg-shaped nuceli and has a distinct north and south pole


    columnar

  • where is pseudostratified ciliated columnar epithelium found typically?


    trachea

    (nasal cavity, bronchi, male reproductive tract)

  • what are the 3 different types of exocrine glands


    serous

    mucous

    mixed exocrine

  • ____ glands secrete watery fluids rich in enzymes


    serous

  • ____ glands secrete glycoproteins called mucins that absorb water to form mucus


    mucous

  • ____ glands contain cells capable of bot serous and mucous secretions, and therefore secrete both


    mixed exocrine

  • ___ mechanism of glandular secretions works by creating secretory vesicles, packaging them, and releasing them via exocytosis; which gland is an example of this


    merocrine

    salivary

  • ___ mechanism of glandular secretions works by shedding the apical portion of the cell; what is an example of this


    apocrine

    mammary

  • ____ mechanism of glandular secretions works by packing the cell full of secretory products until it bursts open; what is an example of this


    Holocrine

    sebaceous

  • are connective tissues open to the environment?


    NEVER

  • What are the 3 main components of all connective tissue


    special cells

    extracellular protein fibers

    ground substance

  • The matrix is a collective term for the extracellular component of any connective tissue that's made up of the ___ ____ and the ____ ____


    protein fibers

    ground substance

  • The matrix can be full of ____ or be relatively _____


    fibers; open

  • what are the 3 main types of connective tissue


    connective tissue proper

    fluid connective tissue

    supporting connective tissue

  • ____ are stationary and involved with local maintenance, repair, and energy storage; these include fibrocytes, fibroblasts, fixed macrophages, adipocytes, mesenchymal cells, and melanocytes


    fixed cells

  • ____ produce connective tissue fibers


    fibroblasts

  • ___ maintain connective tissue fibers and matrix


    fibrocytes

  • _____ store lipid reserves


    adipocytes

  • ____ synthesize melanin


    melanocytes

  • _____ help defend and repair damaged tissues; include free macrophages, mast cells, lymphocytes, neutrophils, and cosinophils


    wandering cells

  • ____ are mobile/traveling phagocytic cells (derived from monocytes of the blood)


    free macrophages

  • ____ stimulate local inflammation via release of histamine and heparin


    mast cells

  • ____ participate in immune response by developing into plasma cells that produce abx


    lymphocytes

  • ____ and ____ and small, phagocytic blood cells that mobilize during infection of tissue injury


    neutrophils and cosinophils

  • What are the 2 types of connective tissue proper


    loose and dense

  • What are the2 types of fluid connective tissue


    blood and lymph

  • What are the 2 types of supporting connective tissue


    cartilage and bone

  • Which fibers make up the connective tissue proper


    collagen, reticular, elastic

  • _____ are very long, cylindrical fibers made up of 3 subunits (reticular fibers) coiled around one another


    collagen fiber

  • _____ the most common and strongest fiber


    collagen

  • _____ and ____ BOTH have collagen proteins


    collagen fibers

    reticular fibers

  • ____ fibers are a single unit of collage proteins


    reticular

  • ____ fibers contain the protein elastin


    elastic

  • reticular fiber = ____ collagen fiber(s)

    ___ reticular fiber(s) = collagen fiber


    1

    3

  • What are the 3 types of LOOSE connective tissue


    areolar

    adipose

    reticular

  • LACT or loose areolar connective tissue, is made up of what 3 materials


    collagen fibers

    elastic fibers

    fibrocytes

  • LACT ___organs, provides ____ but permits independent movement; ____ cells provide defense against pathogens


    cushions

    support

    phagocytic

  • adipose tissue provides ____ and ___ shocks; ____ (reduces heat loss); and ___ energy


    padding and cushions

    insulates

    stores

  • what are the 2 types of dense connective tissue propers


    Regular (DRCT)

    Irregular (DICT)

  • 3 locations of DRCT (and their descriptions)


    tendons (connect skeletal muscle to bone/cartilage)

    aponeuroses (sheets/ribbons that cover muscle surface and help attach muscle to other things)

    ligaments (connective cartilage to cartilage, bone to cartilage, or bone to bone)

  • 3 locations of DICT


    DEEP dermis

    periosteum and perichondrium (cover bone and cartilage)

    capsules of organs

  • what are the fibers in DRCT


    collagen, elastic, reticular

  • Function of DRCT: provides firm ____

    conducts ____ of muscles

    reduces ____ between muscles

    ____ relative positions of bones


    attachment

    pull

    friction

    stabilizies

  • Function of DICT:

    provides ____ to resist forces applied from ___ direction (s)

    helps prevent ____ of organs such as the urinary bladder


    strength; many

    overexpansion

  • Blood is a fluid connective tissue containing a matrix called ____ and various types of cells, or formed elements. What are examples of these formed elements


    plasma

    RBC, WBC, platelets

  • The lymph empties into the ____


    venous system

  • ____ if water and small solutes filtered out of capillaries to bath body's cells


    interstitial fluid

  • ___ contain few cells, high amounts of fiber, and a ground substance that may contain insoluble calcium salts


    supporting connective tissues

  • what are the 3 types of cartilage; which is the most common


    hyaline (most common)

    elastic

    fibrous

  • ____ are little lakes where cells live; are they present in all types of cartilage and bone?


    lacunae

    yes

  • hyaline cartilage provides ___ but somewhat ____ support; reduces ___ between bony surfaces


    stiff; flexible; friction

  • which cartilage is the most flexible


    elastic cartilage

  • elastic cartilage provides ____, but tolerates _____ without damage and ____ to original shape


    support

    distortion

    returns

  • fibrous cartilage ____ compression

    ____ bone-to-bone contact

    ____ relative movement

    Where is it located?


    resists

    prevents

    limits

    intervertebral discs, knee joint, between pubic bones of pelvis

  • as we age, we lose ____% of water in intervertebral discs, which ____ up the fibers, causing older people to become _____


    25

    tears

    shorter

  • what are the two types of bone


    compact; have osteons

    spongy (cancellous); have trabeculae

  • ____ are little canals/spaces that connect osteocytes to each other


    canaliculi

  • ___ are the rings of osteons


    lamelle

  • what are the 4 types of membranes


    mucous

    serous

    cutaneous

    synovial

  • ____ are wet membranes with a connection to the exterior; act as barrier that resists entry or pathogens


    mucous

  • _____ are membranes that line the ventral body cavity


    serous membranes

  • ___ is a thick, dry, water-resistant membrane


    cutaneous

  • _____ are membranes that consist of LACT with an incomplete layer of overlying epithelium


    synovial

  • _____ fascia is continuous


    deep

  • fatty tissue aka ____; below to which type of fascia?


    camper's fascia or subcutaneous layer

    superficial

  • what are the 3 types of muscle tissue


    skeletal

    cardiac

    smooth

  • ____ cells are long, cylindrical, striated and multinucleate

    Located at ____ of digestive , respiratory, urinary tracts

    generates ____

    _____ internal organs


    skeletal muscle

    entrances/exits

    heat

    protects

  • _____ cells are short, branched, and striated; usually with a single nucleus; cells are interconnected by intercalated discs

    located at ____

    ____blood, maintains _____


    cardiac muscle

    heart

    circulates; blood pressure

  • ____ cells are short, spindle-shaped, and nonstriated with a single, central nucleus

    located at ____ of blood vessels and in ____, ___, ___, ___ organs

    ____ food, urine, and reproductive tract secretions

    controls ____ of respiratory passageways

    regulates ___ of blood vessels


    smooth muscle

    walls; digestive, respiratory, urinary, reproductive

    diameter

    diameter

  • are there nerves in the brain or spinal cord?


    no

  • What are the two types of neural tissue cells; what are neural tissues known as


    neurons and neuroglia

    neural or nervous tissue

  • ____ are the cells that transmit the electrical signals

    ____ are the supporting cells of the neural tissue


    neurons

    neuroglia

  • neurons don't have ____ because they rarely replicate; and do so with great difficulty


    centrioles

  • What is the difference between endocrine and exocrine glands


    exocrine glands secrete their products onto body surfaces or cavities and contain ducts

    endocrine glands are DUCTLESS and secret product directly into the bloodstream

  • what are goblet cells


    unicellular/individual secretory cells that occur in epithelia containing scattered gland cells