Passive Active- use atp diffusion Simple movement from high to low conc Can move molecules against the gradient facilitated diffusion Specific molecules attach to proteins and then diffuse osmosis water facilitated diffusion Mitosis: IPMAT What happens in each phase of the cell cycle? Inerphase Prophase Metaphase Anaphase Telephase g1 Sister Chromatids Spilndle Fibers Pulled Apart Clevage s DNA replicates Centromeres In the middle neauclear g2 envelope forms Be able to diagram and label the parts of an osteon . Lamellae- layers of an osteon central canal ( Haversian) canal osteocytes live in the lacunar (space) canal iculi- Trabeculae Cutaneous membrane: dermis epidermis hypodermis Diagram parts of finger nail. body of the nail free edge hyponychium eponychium nail groove lunae Nail bed Germital matrix What are the functions of the integumentary system? ● Barrier protection: trauma, chemicals, water loss, pathogens, UV radiation, etc. ● Sense reception: touch, pressure, pain, temperature. ● Excretion: H O, 2 electrolytes, some drugs. ● Nutritional: Vitamin D What are the various factors that determine skin color? melanin, carotene, blood flow red (hot/blood rushing away from core to cool down) gray (blood retreating to core to maintin internal tempatrur) What are the various glands of skin and how do they secrete? merocrine/eccrine apocrine holocrine Salavary/sweat mammary, prostate sebacous sebum→Infection of sebum acne lubrication for hair, skin moisture and inhibits bacteria growth. CERUMEN GLANDS-cerumen earwax Modified sweat gland
“apocrine” 2nd type of sweat gland- pharamones xillae, groin & areolae areolae (nipples). Ducts empty into (nipples). Ducts empty into hair follicles in pubic regions Specialized Connective Tissue Specialized Connective Tissue – fluid matrix a) Blood: Mesenchyme (Star shaped cells)-They are stem cells that give rise to all connective tissue Osteoprogenitor (stem cells of bones from the mesenchyme) Divide and differentiate into osteo bl asts (boneBUILD) fibroblast- Build connective tissues→elastic and reticular fibers collagen chondroblast- build cartilage →Chondrocytes intramembranous ossification direct Step 1 – Mesenchyme→osteoprogenitor→osteoblasts:→produce osteoid. Osteoid begins to mineralize as the ossification center where Step 2- Trabeculae (bony spicules) trap osteoblasts turning into osteocytes Step 3 Trabeculae turns into spongy bone Step 4- bone remodels itself spongy bone sandwiches the compact bone.
You've reached the end of your free preview.
Want to read all 5 pages?
- Spring '15
- Rob Tibstra
- Human Anatomy, Endochondral ossification, Connective Tissue Specialized Connective Tissue