Which of the following statements about melanin is FALSE? Group of answer choices absorbs UV rays plenty in light-skinned people secreted by melanocytes stored in melanosomes
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- Collagen lends ________ to the skin. elasticity structure color UV protectionKeratinocytes are the most abundant cell type in the epidermis. found throughout all epidermal strata. sometimes alive and sometimes dead, depending on where they are found, All of the answer choices are conect able to synthesize the protein keratin.The mechanism by which a functional MC1R protein affects skin color is it ______ directly stimulates pheomelanin production directly stimulates eumelanin production responds to melanocyte stimulating hormone to increase pheomelanin production responds to melanocyte stimulating hormone to increase eumelanin production
- Histological preparation of skin demonstrates dense unformed connective tissue. What layer of this organ is formed by such tissue? O Reticular dermis Papillary dermis O Epidermis O Basal membrane O Hypodermis *Two strata containing dead cells Vascular region Major skin area from which hair follicles arise Scale-like cells full of keratin that constantly flake off Most inferior epidermal layer involved in cell division Dermal layer responsible for fingerprints Areolar connective tissue Site of elastic and collagen fibers Translucent cells, containing keratin Location of melanocytes and tactile (Merkel) cells Location of free nerve endings and tactile corpuscles Location of sweat and sebaceous glands А. Stratum basale w В. Stratum corneum С. Stratum granulosum D. Stratum lucidum Е. Stratum spinosum F. Reticular dermis Papillary dermis Epidermis G. Н. I. DermisTwo strata containing dead cells Vascular region Major skin area from which hair follicles arise Scale-like cells full of keratin that constantly flake off Most inferior epidermal layer involved in cell division Dermal layer responsible for fingerprints Areolar connective tissue Site of elastic and collagen fibers Translucent cells, containing keratin Location of melanocytes and tactile (Merkel) cells Location of free nerve endings and tactile corpuscles Location of sweat and sebaceous glands А. Stratum basale В. Stratum corneum C. Stratum granulosum D. Stratum lucidum Е. Stratum spinosum F. Reticular dermis Papillary dermis H. Epidermis G. I. Dermis
- Which skin pigment is sunlight induced and what cell produces this pigment? Explain the synthesis & function of this pigment.How does melanin get into the skin? melanocytes are found in the most superficial layer of skin and are full of melanin giving pigmentation keratinocytes absorb surrounding melanocytes as they rise up from the basal layer to the surface melanocytes form in the basal membrane and as they ascend to the surface they change into keratinocytes while maintaining the original amount of melanin they produced melanocytes in the basal layer produce melanin and inject it into surrounding keratinocytes via the dendritesAll of the following are structures of the pilosebaceous unit EXCEPT: hair follicle sweat gland sebaceous gland arrector pili muscle
- Which of the following descriptions are correct regarding the layers of the skin? OA the epidermis has many cells, including keratinocytes and melanocytes the dermis contains many things including fibroblasts, macrophages, mast cells, collagen fibers, elastin fibers OB. and reticular fibers OC. the hypodermis is also known as superficial fascia, contains mostly adipose, and anchors skin OD. Two of the above E. All of the aboveA Font M Paragraph Styles Describe and explain four (4) reasons why the skin contributes to the body's homeostasis. Dictate How is the epidermis different from the dermis - give me four (4) reasons? 1 of 6 314 words IX Editor Contrast keratin and melanin in terms of their structures and functions. 255 Contrast sebaceous and sudoriferous glands in terms of their locations in the skin and what they make in the skin. Focus = Photo by Ev Tchebotarev MAR 20Which of the following skin cells would synapse with a motor neuron? arrector pili muscle cell cell in a sweat gland fibrocyte keratinocyte
