BY 115 Human Anatomy SI Faith Leonard fkaylene uab edu 256 841 2663 Week 4 Integument Answers 1 Name some of the functions of the integumentary system Physical protection from environmental hazards thermoregulation excretion synthesis and storage of lipid reserves synthesis of vitamin D3 provides sensory information coordinates immune response to pathogens and cancers in the skin 2 Name the 2 subdivisions of the skin and name what type of tissue each one is made of Epidermis stratified squamous epithelium Dermis connective tissue subcutaneous layer is connective tissue 3 Name the functions of the following structures Epidermis Protects dermis from trauma or chemicals controls skin permeability and prevents water loss prevents entry of pathogens synthesizes vitamin D3 coordinates immune response to pathogens and skin cancers sensory receptors on the epidermis detect touch pressure pain and temperature Papillary Layer of the Dermis Nourishes and supports epidermis Reticular Layer of the Dermis Restricts spread of pathogens penetrating epidermis stores lipid reserves attaches skin to deeper tissues sensory receptors on the reticular layer of the dermis detect touch pressure pain vibration and temperature blood vessels in the reticular layer of the dermis assist in thermoregulation Hair Follicles Produce hairs that protect skull produce hairs that provide delicate touch sensations on general body surface Exocrine Glands Assist in thermoregulation excrete wastes lubricates epidermis Nails protect and support tips of fingers and toes 4 What layer of the epidermis is ONLY in thick skin Stratum Lucidum 5 What do melanocytes produce Melanin this is what gives your skin pigment and absorbs UV radiation BY 115 Human Anatomy SI Faith Leonard fkaylene uab edu 256 841 2663 6 Name what is in each structure Papillary Layer of the Dermis dermal papillae and loose connective tissue Reticular Layer of the Dermis dense irregular connective tissue blood vessels nerves and accessory structures Hypodermis loose connective tissue blood vessels and subcutaneous fat 7 True or False The Meissner s Tactile corpuscles are responsible for light touch 8 True or False Pacinian Lamellated corpuscles are responsible for pressure 9 What are some changes that occur in the integumentary system as you age Fewer melanocytes dryer epidermis thinner epidermis reduced sweat gland activity thinner dermis reduced blood supply changes in distribution of fat and hair fewer active follicles Multiple Choice Questions 1 Which of the following layers of the cutaneous membrane stores lipid reserves A subcutaneous layer B stratum basale C stratum corneum D papillary layer of dermis 2 Which of the following cell types trigger an immune response in the stratum spinosum A Langerhans dendritic cells B keratinocytes C melanocytes D mast cells BY 115 Human Anatomy SI Faith Leonard fkaylene uab edu 256 841 2663 3 The epidermis in a section of thin skin includes the following four layers In what order do these occur from the basal lamina to the superficial surface 1 stratum granulosum 2 stratum corneum 3 stratum basale 4 stratum spinosum A 1 2 3 4 B 3 4 1 2 C 4 3 2 1 D 3 2 4 1 E 1 3 4 2 4 Merkel cells are found in which epidermal layer A stratum corneum B stratum spinosum C stratum lucidum D stratum basale 5 It takes for a cell to move from the stratum basale to the stratum corneum A 10 24 hours B 15 30 days C 3 7 days D 2 3 weeks E 2 3 months 6 Skin color is due to A dermal blood supply B ultraviolet exposure C melanin D carotene found in keratinocytes E All of the answers are correct BY 115 Human Anatomy SI Faith Leonard fkaylene uab edu 256 841 2663 7 The most abundant cells in the epidermis are A melanocytes B keratinocytes produce keratin protect the skin from pathogens minimize water loss C Merkel cells D Langerhans cells 8 Thick skin can be found on the sole of the foot and the A scalp B back of thorax C abdomen D palm 9 Wrinkles in the skin can be caused by A increasing age B changes in levels of hormones C the effects of ultraviolet radiation D distortion of the dermis during pregnancy or weight gain E All of the answers are correct 10 The blood supply to the skin is called the A brachial plexus B cutaneous plexus C celiac plexus D venous anastomosis E None of the answers are correct 11 The subcutaneous layer is important in A connecting the dermis to the epidermis B stabilizing the position of the skin in relation to underlying tissues C preventing unacceptable water losses through the skin D All of the answers are correct BY 115 Human Anatomy SI Faith Leonard fkaylene uab edu 256 841 2663 12 The subcutaneous layer consists of loose connective tissue with abundant A keratinocytes B sebaceous glands C merkel cells D melanocytes E adipocytes 13 Which of the following parts of a hair is are usually seen on the surface A cortex medulla follicle B bulb root shaft C shaft only D hard keratin bulb root E follicle bulb cuticle cortex 14 The cells found in sweat glands that function to squeeze sweat out of the gland are called A neuroepithelial cells B stratified columnar cells C transitional cells D myoepithelial cells E None of the answers are correct 15 The two groups of sweat glands in the skin are A sebaceous and eccrine B apocrine and endocrine C holocrine and endocrine D eccrine and apocrine E adrenal and holocrine BY 115 Human Anatomy SI Faith Leonard fkaylene uab edu 256 841 2663 16 The most widely distributed type of sweat gland on the body is the A apocrine sweat gland B eccrine sweat gland C ceruminous gland D myoepithelial gland 17 Functions of eccrine sweat glands include which combination of the following 1 lubricating the skin 2 thermoregulation 3 inhibiting the growth of microorganisms 4 excretion of water electrolytes and some drugs A 1 2 B 1 2 3 C 1 3 D 2 3 4 18 Arrector pili consists of A skeletal muscle B loose connective tissue C smooth muscle D adipocytes E cardiac muscle 19 Sebum is produced by glands A sebaceous B eccrine C apocrine D ceruminous E merocrine BY 115 Human Anatomy SI Faith Leonard fkaylene uab edu 256 841 2663 20 A scab forms during the phase of skin regeneration A inflammation B migration C proliferation D scarring 21 Why is the skin capable of repair even after serious damage A Individual skin cells have a high metabolic rate B Stem cells persist in both the epithelial and connective tissue components C Construction of scar tissue is easier than making normal skin D All layers of the skin have