BIO 201L - Integumentary &Introduction into the Skeletal System Lab Practical correct verified answers

BIO 201L - Integumentary &Introduction into the Skeletal System Lab Practical What is the Integumentary System consist of? (4 things) - correct answers Skin Hair Nails Number of different types of glands What is the largest organ in our bodies? - correct answers The integument (skin) The integument is an organ you can visibly see without _______________. - correct answers dissection What is another word for Integument? (Latin) - correct answers Covering (latin) What layers is the integument made up of? (2) - correct answers Superficial epidermis Deeper dermis Is the Hypodermis part of the integument? - correct answers No it is not considered as a part of the Integument but it helps to connect the integument to deeper structures What are the 6 functions of the skin? - correct answers Protection from foreign invaders or microorganisms (acts as a physical barrier) Decreases water loss Temperature regulation Waste secretion (sweat) Protection against ultraviolet (UV) light radiation Facilitates vitamin D synthesis What are the 5 layers of the epidermis from superficial to deep? - correct answers Stratum Corneum Stratum Lucidum Stratum Granulosum Stratum Spinosum Stratum Basale What is the epidermis made up of? (type of tissue) - correct answers Keratinized stratified squamous epithelium What does having keratin within the skin help with? - correct answers Protection to the skin (and hair/nails) toward physical abrasion Keratin is hydrophobic or hydrophilic? - correct answers Hydrophobic Where does keratin come from and what does it mean? - correct answers Greek and horny What is another word for layers? - correct answers Strata Does the epidermis have blood vessels? - correct answers No, it is avascular What kind of cells does the stratum corneum have? - correct answers Tough layer consisting of dead, keratinized, flattened (squamous) cells What does Lucidum mean in latin? - correct answers light layer Which layer is only found in thick skin? - correct answers Stratum lucidum like in the palms of your hand and on your feet What is a precursor to keratin? - correct answers Eleidin Which layer contains high amounts of eleidin? - correct answers Stratum lucidum What happens to the cells in the stratum granulosum? - correct answers They begin to lose their nuclei and intracellular organelles What happens to the lipids in the stratum granulosum? - correct answers They are released by exocytosis which aids in further waterproofing of the skin What type of appearance do the cells within the stratum spinosum have? - correct answers Spiny-like Why do the cells within the stratum spinsosum have a spiny-like appearance? - correct answers They are beginning to contract. Keratinization begins to occur in this layer. What type of cells does the stratum basale consist of? - correct answers Single layer of regenerative cells that are attached to the dermis by the basement membrane When the cells divide in the stratum basale where does it go? - correct answers It repeatedly gets pushed superficially toward the surface as the skin increases in age. How often does skin replenish itself? - correct answers Every 6-8 weeks What specialized cell is within the stratum basale? - correct answers Melanocytes What color pigment do melanocytes produce? - correct answers Brown-colored pigment called melanin What is the function of melanin? - correct answers To help protect against damaging ultraviolet radiation What gives us varying skin tones? - correct answers The amount of melanin produced and its relative distribution