What causes freckles to form?

Slides:

Advertisements

Similar presentations

Moles, Freckles, & Birthmarks And other fun things you should know about them! By: Nnenne Asi.

Advertisements

Ozone Loss and Skin Cancer. Problem Susan Solomon found the correlation between the disappearance of ozone and increased concentration of chloroflurocarbons.

Skin Pigmentation Melanin in the Melanocyte Cells Eumelanin Black/Brown Pigment Pheomelanin Red/Yellow Pigment Response to UV Radiation Pigmented Cells.

Cory Klinger Korey Kainec Ian Behra. What is Melanoma?? Melanoma is a malignant tumor. If not found early, melanoma can ne very dangerous. It is responsible.

Casey Bower. What is Melanoma? Melanoma is the most common cancer in the United States and the most dangerous form of skin cancer, melanoma begins in.

Pigmentation in humans ( melanin cells ) Presented by:- Tshering Yangden Aitasingh Singer Myself.

Melanoma By Libby Walker, Jessica Morehouse, Rebecca Jurovich, Ashley Leonard.

WARM UP 11/18 1. Name the 4 layers of the epidermis in order. 2. What do melanocytes do? 3. What is found in the stratum spinosum? 4. What does keratin.

Cassie Long LaQuanda Lee Tyler Whirley. Description of Skin Cancer: Skin cancer is a cancer of the cells in the outermost layer of skin, called the epidermis.

ALBINISM What is it? Albinism is characterized by the loss of all of the pigmentation in your body including your skin, hair and eyes ;therefore, you.

SKIN CANCER Senior Health-Bauberger. SKIN CANCER Skin cancer is the most common form of cancer in the United States The two most common types of skin.

DOMINANT AND RECESSIVE TRAITS January 22, 2015 These terms occur very often in the study of genetics. This lecture will deal these topics to give you an.

Skin Conditions  Blackhead  Acne  Cancer  Goosebumps  Sunburn.

Skin Cancer: The Facts. The Facts………. Skin cancer is the most common cancer Approximately 1 million cases per year It is estimated that nearly half of.

Skin Cancer Colleen M., Anna C., Page B. The black ribbon is the symbol for Melanoma/Skin Cancer Awareness.

 Causes and symptoms  3 main types of melanoma  Diagnosis  Treatments  Tips on prevention  Conclusion.

On your paper, complete the following:  Using your book, define the following terms: Pore Melanin Follicle  Leave book open to page 490 when finished.

Skin Color Three pigments: – Melanin – Carotene – Hemoglobin.

Melanoma By Blake Mednick. Introduction: Melanoma Causes the most deaths of all the skin cancers Begins in Melanocytes 1 in 65 people will be diagnosed.

DOMINANT AND RECESSIVE TRAITS January 23, 2014

Lower segment (bulb and suprabulb) Extends from base of follicle to insertion of erector pili muscle Bulb Suprabulb.

Melanoma By Joshua Hook. What is Melanoma? Melanoma is the most severe kind of skin cancer. It starts in skin cells called melanocytes. Even though melanoma.

Sponge: Set up Cornell Notes on pg. 51 Topic: 6.5 Skin Color Essential Question: Scientifically, should skin color be used when determining a person’s.

Genetics of Hair Simple Trait, Complex Genetics. What determines our natural hair color?

Androgen alopecia Baldness Genetics Caucasian m/c – almost 100% eventually In females, intact frontal hairline Starts 30-50yoa.

Skin Cancer Brochure.

What is the origin of different skin colours? The three factors that influence skin color are: The chemical composition of one’s skin, the biological evolution.

Genetics By Morris and Eun-hwa. Contents What is Genetics? What can go wrong/ How does it work Interesting Facts/ Conclusion Picture.

Melanoma Raising Awareness. Quick Facts About 68,720 people were diagnosed with melanoma in ,650 died of melanoma Melanoma accounts for 3% of skin.

Melanoma By Liam Hanrahan. What is Melanoma? Melanoma is the fourth most common cancer, usually appearing as a pigmented skin lesion. Australia has the.

Chapter Melanin  Two forms: brown-black & pink-red  Made by melanocytes  Only found in deeper layers of epidermis  Freckles & moles = local.

March 5, By the end of class, I will be able to…  Describe the role of Melanin in tanning.  Explain the difference between malignant and benign.

An introduction to skin colour and the skin condition vitiligo The Science Behind Skin Colour © Changing Faces 2009 Registered Charity No Charity.

Date EntryPage # 1/8 Genetic Terms5. Genetics Terms 5 1. Genetics – 2. Heredity – 3. Traits – Turn to page 5 in journal and write the terms below. Skip.

; ; ; Phenotypic Pigmentation The Genetics of. What factors contribute to phenotypic color variation? A. Environment B. Genetics C. Neither D. Both E.

“Cancer Do Now” _______ third of women will develop cancer in their lifetime. Where does New York fall for the most new cancer cases in the US? What.

Lori Hoch, RN, BSN Shelby County Public Health

Case Study Read page 84.

Aim: How can mitosis lead to a disruption in homeostasis?

Aim: How can mitosis lead to a disruption in homeostasis?

What causes Hair and Eye Color to Change over Time?

Dr. Qassim Al-chalabi M.B.Ch.B F.A.B.H.S (Dermatology & Venereology)

BUT THE DOCTORS TOLD MY PARENTS I WOULD BE, LIKE,

Melanoma - Skin Cancer Cancer Project.

Skin Problems – infections, allergies, or damages

Pigmentation DHO Ch 7.3 Pg 153.

What causes Hair and Eye Color to Change over Time?

B) DERMIS (Pg. 117 – 119) The 2nd Major Skin Layer.

Pigmentation DHO Ch 7.3 Pg 153.

Mutations 9 Biology.

Ashlynne, Riley, Abby, Sarah, Samantha

By: Madison Lipscomb, Shae Eggert, McKenna Hagan, Malik McFarlane

Integumentary System Chapter 5.

Melasma & Ephelis Pharmacology IV (PHL 425)

Incomplete Dominance Codominance Sex Linked Polygenic Traits

Covering and Protecting the Body The Integumentary System

How different types of cells look different!!

Integumentary system.

Integumentary System Notes

BUT THE DOCTORS TOLD MY PARENTS I WOULD BE, LIKE,

Describe the process known a keratinization?

TRAITS Traits are personal characteristics. They are things about you, such as how you look or what you like.

Malignant Melanoma Aalayis Suggs.

Presentation transcript:

What causes freckles to form? Ellie Walker E Block

picture 1 What are freckles? Freckles are pigment-producing cells in our skin (melanocytes) Mostly visible on people who have fair skin and/or red hair picture 3 picture 2

What are freckles in relation to skin? Low concentration of melanin in their skin More likely to have freckles Due to not as much protection from the sun picture 4

What causes the pigment in freckles? The freckles contain a pigment called melanin Melanin is made up of melanocytes UV rays activate the melanocytes which makes freckles darker

What is the difference between freckles and moles? Freckles are temporary brown spots caused by sun Moles are permanent dark spots (formed by skin cells (melanocytes) grow in a cluster rather than spreading out Both very common picture 6 picture 5

What causes freckles to form on skin? The more sun exposure, the more freckles When you are out in the sun for a long time your skin produces more melanocytes to protect skin With the more protection the more pigment shows Causing the formation of freckles/dark spots picture 7

Genetic Freckles MC1R gene is the cause of genetic freckles MC1R gene is a set of instructions for making the MC1R protein The MC1R protein is located outside of melanocytes where it balances the pigments in hair and skin Eumelanin (every other color) & Pheomelanin (red hair and freckle color) MC1R turns pheomelanin into eumelanin When MC1R is broken, red hair is produced I have brown hair and freckles, this is due to how many copies of MC1R genes I have

Why is this topic important to me? The topic of freckles forming on the skin is because I also have freckles Have grown up thinking one thing but this research help broaden my horizon My freckles are genetic (comes from my mom and dad)

Cited Sources “Freckles, Moles and Melanomas.” Cambridge University Hospitals. Web. 16 Sept. 2016. Hanson Kerry M.; Gratton Enrico; Bardeen Christopher J. (2006). “Sunscreen enhancement of UV-induced reative oxygen species in the skin”. Free Radical Biology and Medicine. “Moles, Freckles, Skin Tags: Types, Causes, Treatments.” WebMD. WebMD, Web. 20 Sept. 16 Robbins and Cotran Pathologic Basis of Disease Elsevier. 2005. Page 1232. ISBN 0-8089-2302-1 “What Causes Freckles?” Wonderopolis Web. 16 Sept. 2016 “What Causes Freckles.” Freckles Web. 16 Sept. 2016 “Why Do Freckles Come out in the Sun?” HowStuffWorks. 04 Aug. 2009. Web. 20 Sept. 2016 Gnanashanmugam, By Dr. Devasena. “Understanding Genetics.” Understanding Genetics. Web. 21 Sept. 2016