328notes317[1] - zol 328 notes 3/17 INTEGUMENT melanin(2...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
zol 328 notes 3/17 INTEGUMENT melanin (2 types) eumelanin —black pigment --blond, brown, black hair --skin pigment phaeomelanin —reddish --red hair synthesized from phenylalanine phenylalanine-->tyrosine-->DOPA-->melanin if phenylalanine-//->tyr, then PKU occurs (in infants) mental retardation controlled by diet low in phenylalanine if DOPA-//->melanin, then albinism occurs --siamese cats and himalayan rabbits have a mutation in tyrosinase gene only folds properly at low temperatures (inactive at warm temps) only produce melanin at extremities, because the body core is too warm glands many lie in the dermis but originate in the epidermis (epidermal glands) grow downwards sweat glands sebaceous glands—oily and waxy material often open onto hair follicles mammary glands—derived from either sweat or sebaceous glands mammalian synapomorphy during development, form "milk line" usu. on ventral side; varying numbers (figure 6.10 in book has lots of types of glands) dermis connective tissue can produce bone (dermal) blood vessels plentiful blood can be shunted to or from dermis to control body temp nerves plentiful
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern