SCIE 1P51 Final Exam Questions & Answers 2024/2025
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Course
SCIE 1P51
Institution
SCIE 1P51
SCIE 1P51 Final Exam Questions & Answers 2024/2025
UVA - ANSWERSRadiation that is in the region of the ultraviolet spectrum which is nearest to visible light and extends from about 320-400 nm in wavelength and that causes tanning and contributes to aging of the skin
UVB - ANSWERSRadiation t...
SCIE 1P51 Final Exam Questions &
Answers 2024/2025
UVA - ANSWERSRadiation that is in the region of the ultraviolet spectrum which is nearest to visible light
and extends from about 320-400 nm in wavelength and that causes tanning and contributes to aging of
the skin
UVB - ANSWERSRadiation that is in the region of the ultraviolet spectrum which extends from about 280-
320 nm in wavelength and that is primarily responsible for sunburns, aging of the skin, and the
development of skin cancer.
UVA1 - ANSWERS300-400 nm
UVA2 - ANSWERS320-340 nm
In vitro - ANSWERSPerformed or taking place in a test tube, culture dish, or elsewhere outside a living
organism
In vivo - ANSWERSPerformed or taking place in a living organism
Nevi - ANSWERSAny congenital anomaly of the skin, including moles and various types of birthmarks
Actinic Keratosis - ANSWERSA rough, scaly patch on your skin that develops from years of exposure to
the sun. Its most commonly found on your face, lips, ears, back of your hands, forearms, scalp or neck
Squamous cell carcinoma - ANSWERSA health condition involving the uncontrolled growth of abnormal
cells in the skin outer squamous cells of the epidermis. It occurs as a result of keratinization of the
epidermal cells and has the potential to metastasize to other regions of the body
,Melanoma - ANSWERSA tumor of melanin - forming cells, typically a malignant tumor associated with
skin cancer
SPF - ANSWERSSun protection factor. SPF numbers on a package can range from as low as 2 to as high as
100. These numbers refer to the products ability to screen or block out the suns burning rays
Erythema - ANSWERSSuperficial reddening of the skin, usually in patches, as a result of injury or
irritation causing dilatation of the blood capillaries
CW - ANSWERSThe critical wavelength. the wavelength at which the summed absorbance reaches 90%
of total absorbance and is considered to be a measure of the breadth of sunscreen protection
PMMA - ANSWERSPolymethylmethacrylate - a glassy synthetic resin obtained by polymerizing
methylmethacrylate, used to make perspex, plexiglas, and lucite
J/cm3 - ANSWERSJoules per square centimeter
Titanium dioxide - ANSWERSA white un-reactive solid that occurs naturally as the mineral rutile and is
used extensively as a white pigment
Zinc Oxide - ANSWERSAn insoluble white solid used as a pigment and in medicinal ointments
UVA PF/SPF ratio - ANSWERSProtection factors should be 1:3 at a minimum
Autologous - ANSWERScells or tissue obtained from the same individual
ECM - ANSWERSExtracellular matrix (is a collection of extracellular molecules secreted by support cells
that provides structural and biochemical support to the surrounding cells
Collagen - ANSWERSThe main structural protein found in skin and other connective tissues, widely used
in purified form for cosmetic surgical treatments
, Autograft - ANSWERSA graft of tissue from one point to another of the same individuals body
Allograft - ANSWERSA tissue graft from a donor of the same species as the recipient but not genetically
identical
Xenograft - ANSWERSA tissue graft or organ transplant from a donor of a different species from the
recipient
Keratinocytes - ANSWERSA epidermal cell that produces keratin
Fibroblasts - ANSWERSA cell in connective tissue that produces collagen and other fibres
Melanin - ANSWERSA dark brown to black pigment occuring int he hair, skin, and iris of the eye in people
and animals. it is responsible for tanning of skin exposed to sunlight
Murine - ANSWERSRelating to or affecting mice or related rodents
Mesenchymal cells - ANSWERSMultipoten tstromal cells that can differentiate into a variety of cell types,
including osteoblasts, chondrocyes, myocytes, and adipocytes.
Epithelialization - ANSWERSThe process of covering a denuded surface with epithelium
Proliferation - ANSWERSRapid reproduction of a cell, part, or organism
Differentiation - ANSWERSThe action or process of differentiating
Human Genome - ANSWERSMade up of double helix molecule - DNA (DNA comprised of sugar molecule
and nitrogen containing molecules)
-Human DNA has 3 billion nitrogen base pairs
-Human DNA has 20,000 genes
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