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10918704816Nervous tissueinternal communication; brain, spinal cord, nerves neurons- receive, send, and process nerve impulses - Dendrites: collect signals (listens) - Axons: carries messages (speaks) glial cells- support, insulation, protection and tethering them to blood vessels0
10918711814Muscular tissuemovements and contractions - skeletal: bones (body movements, expressions, posture), obvious striations, voluntary, multiple nuclei - cardiac: heart (pumping of blood), involuntary, striated with intercalated disc, messy cell shapes, one nucleus - smooth: lines walls of blood vessels and hollow organs like digestive and urinary tract and uterus, no striations, short and tapered at end, involuntary, packed together1
10918726201Epithelial tissuelines and covers and generally organizes the body protection, secretion, excretion, absorption, filtration, sensation skin surface (epidermis), lining of GI tract, & other hollow organs2
10918732456Two main types of Epithelia tissue1. Covering and lining of external and internal surfaces 2. Glandular epithelium (secretory tissue in glands) - forms your glands and secretes hormones3
10918737394Glandular Epithelium: Endocrine & Exocrine- Endocrine: secretes hormones (pineal, pituitary, thyroid, adrenal, pancreas, ovaries, testes - Exocrine: secrete products into ducts (sweat, saliva, mucus, stomach acid, milk)4
10918742436Parenchymacells produce and secrete substances simple cuboidal or columnar5
10918745002Characteristics of Epithelial tissues1. cells have polarity meaning distinct sides - apical (upper, free) - basal (lower, attached) 2. composed of closely packed cells - cell junctions: tight junctions, gap (communication) junctions, & desmosomes - tight junctions prevents leaking and invasion of bacteria - gap (communication) junction water filled channels and allow direct electrical excitation - desmosomes holds cells together, prevents separation, and resist mechanical stress 3. supported by connective tissue reticular lamina 4. tissues are avascular meaning they are not associated with blood vessels - no blood supply 5. high rate of regeneration6
10918761149shapes of epithelial tissuesquamous, cuboidal, columnar - squamous: flat scale; fast absorption and diffusion easy for oxygen to move inside of it because it is flat - cuboidal: cube, absorb nutrients and produces secretions (sweat) - columnar: tall and thick, absorb nutrients and produces secretions (stomach lining, make and secrete mucus)7
10918768797simple squamous epitheliumFunction: Allows passage of materials by diffusion and filtration in sites where protection is not important; secretes lubricating substances in serosae. Location: Kidney glomeruli, air sacs of lungs, lining of heart, blood vessels, and lymphatic vessels; lining of ventral body cavity(serosae)8
10918769901simple cuboidal epitheliumFunction: secretion and absorption Location: Kidney tubules; ducts and secretory portions of small glands, ovary surface.9
10918770880simple columnar epitheliumFunction: Absorption; secretion of mucus, enzymes, and other substances; ciliated type propels mucus (or reproductive cells) by ciliated action. Location: nonciliated type lines most of the digestive tract (stomach to anal canal), gallbladder and excretory ducts of some glands; ciliated variety lines small bronchi, uterine tubes, and some regions of the uterus.10
10918773952simple pseudostratified columnar epithelium-only appears to be stratified -cilia located on the free surface of these cells -goblet cells -secrets and propels respiratory mucus -found in respiratory system and urethra11
10918776507stratified squamous epithelium (keratinized)Function: protects underlying tissues in areas subject to abrasion; retards water loss Location: epidermis; palms and soles12
10918782644stratified squamous epithelium (non-keratinized)Function: same as keratinized but no layer of dead cells resist abrasion and penetration by pathogenic organisms Location: tongue, oral mucosa, esophagus, anal cavity, vagina13
10918787130stratified cuboidal epitheliumFunction: protection Location: Largest ducts of sweat glands, mammary glands, and salivary glands.14
10918788354stratified transitional epitheliumfunction: stretches to allow filling; protects from osmotic damages location: urinary tract- kidney, bladder, urethra, ureter15
10918792386Types of secretion:serous glands (produce thin, watery fluids) - perspiration, milk, tears mucous glands (produce glycoprotein) - absorbs water and forms sticky mucus mixed exocrine glands both serous and mucous cells16
10918799715cutaneous membraneThe skin; composed of epidermal and dermal layers stratified squamous epithelia dry17
10918801752serous membrane (serosa)Thin, double-layered membrane separated by serous fluid18
10918802614Connective tissuesupports, protects, binds other tissues together -bones and cartilage -tendons and ligaments -fat and other soft padding tissue19
10918806257-blastscreate the matrix, example osteoblast immature "forming"20
10918808157-clastsbreak the matrix down for remodeling21
10918809119-cytesmaintain matrix less active mature22
10918812569chondroblastcartilage23
10918813756osteoblastsbone24
10918815544hematopoieticbone marrow25
10918817265Connective tissues have:1. mesenchyme as common origin 2. diff degrees of vascularity (blood flow) 3. cells are separated by nonliving (extracellular matrix (ground substance, fibers, and cells) - allows tissue to bear weight, withstand tension, and stress26
10918825195protein fibers of connective tissuecollagen - white fibers, strongest, and most abundant Elastic - yellow fibers, long, thin, elastic fibers (stretch and recoil) reticular - short fine highly branched collagenous fibers27
10918831770ground substance of connective tissuemedium through which solutes diffuse between blood capillaries and cells Components: - hyaluronic acid: slippery, good lubricant for joints - proteoglycans: protein core and trap waters in varying amounts28
10918837608cells of connective tissueadipose: dermis of skin mast cells: beneath membranes; along small blood vessels leukocytes: white blood cells macrophages: provide protection platelets: fragments of hematopoietic cells (blood clotting)29
10918848419loose (areolar) connective tissueallows passage of nerves and other vessels vessels; fascia between muscles; visceral layers of pericardium and pleura30
10918856537loose reticular connective tissuelymphoid organs (lymph nodes, bone marrow, and spleen) holds your blood31

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