1...Which of the following types of hair is generally not foundon bald men?
| lanugo hairs |
| All are found on bald men. |
| terminal hairs |
| vellus hairs |
a...What structural characteristic of the epidermis preventswater loss and the entry of pathogens?
| stratified squamous epithelium |
| tactile disc |
| dermal papillae |
| melanocyte |
b...If you have a manicure and get your cuticles pushed back,the manicurist is technically doing what?
| Pushing a portion of the stratum corneum back from theeponychium |
| Pushing a portion of the stratum spinosum back from thelunula. |
| Pushing a portion of the stratum germanitivum back from thehyponichium |
| Pushing a portion of the stratum lucidum back from the nailbody. |
c....Which layer of the dermis contains the capillaries,lymphatic vessels, and sensory nerve fibers that supply theepidermis?
| subcutaneous layer |
| stratum basale |
| reticular layer |
| papillary layer |
d....Reduction in the number of elastic fibers in the skin ofthe elderly results in __________.
| osteoporosis |
| hair loss |
| wrinkles |
| skin dryness |
e....All of the following are functions of the subcutaneouslayer EXCEPT __________.
| stabilizing the position of the skin relative to underlyingtissues |
| thermoregulation |
| acting as a blood reservoir |
| detection of fine touch |
The layer that contains areolar connective tissue is the__________ layer.
| epidermal |
| subcutaneous |
| reticular |
| keratin |
Which of the following is NOT an aging effect on skin?
| Hair follicles become more active, producing longer, darkerhairs. |
| Glandular activity decreases. |
| Blood supply to the dermis is reduced. |
| The epidermis thins and the integument becomes lessresilient. |
Why are the elderly more prone to skin infections?
| They have a thinner epidermis. |
| They have fewer dendritic (Langerhans) cells. |
| Tissue repairs take longer. |
| All of the listed responses are corre |
Individuals who live in locations with limited exposure tosunlight can have abnormal bone development due to an inability toabsorb calcium and phosphate ions from the small intestine. Whydoes a limited exposure to sunlight cause abnormal bonedevelopment?
| Cholecalciferol, or vitamin D3, is necessary for thenormal absorption of calcium and phosphate ions. VitaminD3 is made by cells in the epidermis due to exposure tosunlight. Without enough exposure to sunlight, the body won'tproduce enough vitamin D3. |
| People exercise less in areas where there is limited sunlight.This lack of exercise can cause abnormal development of bones. |
| People sleep more in areas of limited sunlight. |
| People are more depressed in areas with limited sunlight, anddepression can cause abnormal development of bones. |
The skin can move easily over the underlying muscles because ofthe loose connective tissue within the __________.
| dermis |
| cutaneous membrane |
| epidermis |
| hypodermis |
Two women are comparable in age, body conformation, and arepregnant at the same time, but one experiences stretch marks, whilethe other does not. What would be a possible hypothesis for whythere was an observed difference?
| The woman with stretch marks has a greater collagen-to-elasticfiber ratio. |
| The woman may have different gender babies. |
| The woman with less stretch marks has larger skin cells. |
| The woman without stretch marks has more cholesterol in herdiet, which affects her cell membranes. |
Collagen to repair a deep skin wound is produced by__________.
| keratinocytes |
| macrophages |
| epidermal fibroblasts |
| fibroblasts |
Skin exposed to ultraviolet light increases production of__________.
| keratin |
| carotene |
| collagen |
| melanin |
If an injury covers a large area, dermal repairs first beginwith the division and migration of what cell type?
| epidermal cells |
| fibroblast cells |
| melanocytes |
| epithelial cells |
The process of skin repair after injury begins with__________.
| formation of scar tissue |
| inflammation |
| formation of granulation tissue |
| formation of a blood clot |
The epidermal layer that consists almost entirely of keratin isthe __________.
| reticular layer |
| stratum granulosum |
| stratum basale |
| stratum corneum |
Which of these is NOT an accessory structure of the skin?
| sebaceous glands |
| hair |
| hair follicles |
| dermis |
