Exam 3- BIOS 251 Questions with Complete Solutions

Exam 3- BIOS 251 Questions with Complete Solutions
What are the three layers of the skin? Correct Answer-epidermis, dermis, subcutaneous

layer




What are the accessory organs of the skin? Correct Answer-sweat glands, oil glands, hair,

nails




What are the functions of the skin? Correct Answer-protection, manufactures Vitamin D,

largest sense organ, thermoregulation, nonverbal communication




What happens to blood vessels in warm weather? Correct Answer-blood vessels dilate




What happens to blood vessels in cold weather? Correct Answer-blood vessels constrict




What does skin have the ability to absorb? Correct Answer-lipid-based drugs




The epidermis is composed of what 5 cell types? Correct Answer-• stratified squamous

epithelium (lining)


• keratinocytes (cells that make keratin)

, Exam 3- BIOS 251 Questions with Complete Solutions
• melanocytes (cells that make melanin)


• langerhans cells (immune cells)


• merkel cells (tactile sensory cells)




What are the epidermis layers from young to old; deep to superficial? Correct Answer-•

stratum basale


• stratum spinosum


• stratum granulosum


• stratum lucidum


• stratum corneum




What are the two types of melanin? Correct Answer-pheomelanin and eumelanin




What is the dermis made of? Correct Answer-connective tissue




What does the dermis contain? Correct Answer-collagen, reticular fibers, elastic fibers, and

fibroblasts