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Merocrine secretion
- (eccrine) secretion cells form secretory product, store in cytoplasm in vesicles and release it by exocytosis
- -tear, pancreas, gastric
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apocrine secretion
actually merocrine in nature but name has remained
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cells accumulate secretory product in cytosol, die and are discharged with their contents as secretion.
- holocrine secretion
- oil glands and eyelid
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secrete products onto apical surfaces or into ducts for transport onto the free surface
-sweat mammary, tear
-unicellular(Golblet cell)/multicellular glands(secreting organ found deep to free surface attached to it via a duct)
Exocrine gland
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3 basic elements of CT
- amorpheous ground substance
- fibers
- cells
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Matrix=
Ground substance+specific chemicals+fibers
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hyaluronic acid
in ground substance of CT gives water some viscosity
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classification of bone tissues
- loose ct
- dense ct
- catilage
- bone
- blood
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reticular tissue
- stroma of liver, spleen, lymph nodes, red bone marrow, basement membrance
- network of short interlacing collagen and reticular fibers and fibroblasts
- form framework of organs, bind smooth muscle cells
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lacunae
"spaces" in hyaline cartilage
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____ cartilage is a classic example of form follows function
fibrocartilage bcuz has a lot of collagen fibers to resist weight of body and stretching an pulling
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membrane
an epithilium and underlying connective tissue
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mucous membrane
- the subepithilial layer is held to the ct below by the basement membrane
- line body cavities that open directly to the external environment
- line the repiratory tract, digestive and gentiourinary
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serous membrane(serosa)
- line caivities that do not open to exterior of the body and coverthe external(lines thoracic cav) surfaces of the viscera
- parietal(attached to body wall) and visceral layers(attached to organ)
- serous fluid between serosa layers that lubricates and allows free movement of organs
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not true membranes becuz dont have an epithilial layer
compsed of aerolar CT with elastic fibers and varying amount of adipose tissue
cells are Synoviocytes and they secrete synovial fluid
synovial membrane
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fibers are very thin collagen fiber coated with GLYCOPROTEIN. form spongelike framework(stroma) for organs like spleen and lymph nodes
reticular fibers
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glycoprotein
coat thin collagen fibers in reticular fibers
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a cell which originates from a mesenchymal stem cell and forms chondrocytes, commonly known as cartilage cells
chondroblast
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chondrocyte
cartilage cell which produced cartilaginous matrix
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of the skin cover the surface of the body. They consist of stratified squamous epithelium and the underlying connective tissues
cutaneous membrane
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specialized region of connection between two cells
intercellular junction
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macrophage
- type of white blood cell that ingests forgein materials
- key player in immune response
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layer of dense irregular issue which surrounds the cartilage of developing bone
perichondrium
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tonicity
ability of a solution to affect the pressure and volume of a cell
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inclusions
temporary structures suspended or stored within the cytoplasm that contain secretion and strorage products of the cell
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facilitated diffusion
- too large or too lipid soluble to diffuse through membrane channels so use transporter proteins, move down the concen gradient
- depend on concentration grad, number of transporters available, and rate at which transporter and substrate combine
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in the layers of the dermis
the papillary layers is the top made of
and the reticular is made of
- areolar and elastic CT
- dense irregular with elastin
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eccrine and apocrine are ____ glands
suderiferous(sweat) glands
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gives your distinct smell in armpit and pubic
stinky glands we excrete microbial wastes
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hypodermis
- subcutaneous layer or superficial facia, not true part of skin
- areolar and adipose tissue
- serves to attach dermis to underlying tissues and protection of mech blows, and store energy
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cell type in the epidermis produce keratin to protect skin
has anchoring junctions called desmosomes that weldcells teogether
keratinocytes
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produce the brownblack pigment melanin that absorbs UV light. transfer the melanin tothe keratinocytes in strata spinosum for distribution through the layers
melanin shelters nucleus from UV
melanocytes
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keratohylin
- in stratum granulosum that is a precurser of keratin
- waterproofing substance
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eleidin is an intermediate molecule the the formation ofkeratin in
stratum lucidum(thick skin)
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deeper layer of dermis consists of dense irregular CT and interlacing bundles of collagen and elastin fibers
reticular dermis
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dermal papillae
- in the papillary dermis, are hilllike projections containing loops of blood capillaries
- resist slippage of epidermis across dermis
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in sudiferous gland producing a waxy secretion in the external auditory canal
ceruminious glands secrete cerumen
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