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HHP 1150 Unit 1
Tissues
| Question | Answer |
|---|---|
| What are the four types of tissue? what do they make up? | epithelial (body linings, glands) connective tissue (bones/cartilage, ligaments/tendons, blood and fat) muscle tissue (muscle) nervous tissue (nerves and shit) |
| What is is epithelial tissue? Where is it derived from, what is is overall function, provide examples. | tissue making up linings of body such as skin and glands. overall function is to provide protection, sensation, control permeability, allow secretions |
| Describe the structural characteristics of epithelial tissue | -cellularity: made up of many cells bound together by several types of intercellular junctions. There is little extracellular matrix -basal surface of epithelia attached to connective tissue below it via the BASEMENT MEMBRANE |
| Describe how epithelial cells are classified | by layer and shape of cells layer (simple, stratified) apical surface AKA shape (squamous, cuboidal, columnar, transitional) |
| What are glands? distinguish between exocrine and endocrine glands | specialized secretory tissues occurring in epithelium . Exocrine glands have ducts and can secrete to end of duct. -Endocrine glands are ductless and transfer hormones by secreting them into bloodstream |
| What is is connective tissue? Where is it derived from, what is is overall function, provide examples. | most diverse, abundant, widely distributed, structurally varied tissue type derived from mesoderm. Overall function to support,, protect, bind organs (the glue binding structures together). Blood, tendons, ligaments, cartilage, bones, adipose |
| Describe the structural characteristics of connective tissue. | -different types of specialized cells scattered through connective tissue (fixed vs. free) resulting in different levels of density tissue :. variety -specialized cells for special tissues of support, connection, fluid connection |
| Describe the three protein fibers found in connective tissue extracellular matrix | -strengthen and support -Collagen: AKA white fiber, most abundant long & strong connective -Elastic: stretch (elastic properties) -Reticular: branching framework allow to contribute to structure of walls of hollow organs |
| Provide some functions of connective tissue | -protection: bones, blood&organs (immune protection) -support and structural framework, binding of structures: bones, cartilage, tendons and ligaments -storage: adipose -transport: blood |
| Connect Tissue 1: Areolar. Give the structure and function as well as an example | -loose connective tissue fiber made up of all three protein fibers found in connective tissue -surrounds and protect organs, connects skin to underlying structure -papillary layer of dermis |
| Connect Tissue 2: Adipose. Give the structure and function as well as an example | -loose connective tissue formed by adipocytes -stores E for thermoregulation and to surround and cushion organ -subcutaneous fat |
| Connect Tissue 3: Cartilage. Give the structure and function. Describe the three types of cartilage and where they can be found | -supportive, dense connective tissue formed by chondrocytes ("cartilage-cells") -THREE TYPES: Hyaline (joints), elastic (ear), fibrocartilage (sturdiest, little mobility, found in ligaments, tendons, intervertebral discs |
| Connect Tissue 4: Bone. Give the structure and function. Give the two types of bone | -supportive, dense connective tissue formed by osteocytes, osteoblasts, and osteoclasts -support, protect, nutrient storage -compact (darker, solid) vs spongy (bridges of bone tissue) |
| Connect Tissue 5: Fluid. Give the structure and function as well as an example | -refers to blood and lymph -blood: consists of plasma (fluid), erythrocytes (RBC), leukocytes (WBC), and platelets (clotting particles) -lymph: derived from plasma, has no formed elements -both transport good stuff in and bad stuff out |
| Define the different classifications of connective cells/tissues (Proper -dense, loose, special. Supporting-cartilage, bone). | Connective Tissue- loose (protein fibers create loose framework), dense (protein fibers packed) Fluid Connective Tissue- blood, lymph Supporting Connective Tissue- cartilage (solid rubbery), bone (solid crystalline) |
| What is muscle tissue? Where is it derived from? What is its function? | muscle. mesoderm. generates tension and moves shit around like bones, blood, food, semen ykyk |
| Three types of muscle tissue. Determine if striated and voluntary | skeletal (S, V) cardiac (S, UV) smooth (US, UV) |
| What is nervous tissue? What is its role? Where is nervous tissue found? | nervous system tissue, coordination and communication, brain, spinal cord, nerves |
| What cells make up nervous tissue? What are their roles? | neurons: send electrical impulses glial cells: support, "helper" |
| What happens to tissues when they are no longer used, used less, age, etc? | Tissues change structurally and chemically |
| Four common tissue changes | hypertrophy: increase size due to increase cell size hyperplasia: increase size due to increase cell number neoplasia: out of control growth (tumor) atrophy: decrease size due to decrease cell size or number |
| how do tissues vary? how are they similar? | -all derived from primary germ layers -vary with respect to structures, functions, specialized cells, presence of extracellular space |
| how do simple and stratified epithelial cells differ in terms of permeability | simple is weak with only one layer of cells :. very leaky :. great for diffusion stratified is multilayer-- very strong. Little permeability. |
| explain the the four types of apical surfaces of epithelial cells | AKA shape of cells squamous: flat, irregularly shaped like eggs cuboidal: sides of about equal length columnar: taller than wide transitional: change shape due to stretchy, push, etc |
| how do glands secrete their substances? | glands hold the substances (that are to be secreted) in their cells. When really to secrete, disintegrate cells and contents are able to leave gland. |
| Define osteocytes, osteoblasts, and osteoclasts and how they play a role in tissue | connective tissue cells specialized for bone. osteocytes: bone cell/ cells inside bone osteoblasts: formation of new bone osteoclasts: break down aged bone |