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ap chap 5
chapter 5 integumentary system
| Question | Answer |
|---|---|
| which of the following statments indicates the way in which the body's natural defenses protect the skin from the effects of UV damage? | prolonged exposure to the sun induces melanin dispersion which in turn acts as a natural sunscreen |
| which statment correctly explains why hair appears the way it does | kinky hair has a flat ribbon like hair shaft |
| the reason the hypodermis acts as a shock abosrber isthat ____ | the major part of its makeup is adipose, which serves as an effective shock absorber |
| although the integument is a covering it is by no means simple and some of its functions include ____ | resident macrophage like cells whose function is to ingrest antigenic invaders and present them to the immunce system |
| changes in the color of skin are often an indication of a homestatic imbalance which of the following changes would suggest that a person is suffering form addisons disease | the skin takes on a bronze or metallic apperance |
| acne is a disorder associated with | sebaceous glands |
| what are the most important factors influencing hair growth | nutrition and hormones |
| a needle would pierce the epidermal layers of the forearm in which order | corneum, grandulosum, spinosum,basale |
| the major regions ofa hair shaft include all of the following except____ | external rooty sheath |
| wahter loss through the epidermis could cause a serious threat to the health and well being. which of the following protects us against excessive water loss through the skin | lamellated granules ofthe cells of the stratum granulosum a glycolipid that is secreted into extracellular spaces |
| which type of skin cancer appears as a scaly reddened papule and tends to grrow rapidly and metastasize | squamous cell carcinoma |
| which of the following cutaneous receptors is specilized for the reception of tough or light pressure | meissners corpuscles |
| the dermis has two major layers; which of the following constitues 80% of the dermis and is responsible for the tensions lines in the skin | reticular layer |
| the function of the root hair plexus is to | allow the hair to assist in touch sensation |
| keratinocytes are an important epidermal cell because they___ | produce a fibrous protein that gives the skin much of its protective properties |
| which of the follwing statments best describes what fingernails actually are | fingernails are a modification of the epidermis |
| what is the first threat ot life from a massive third degree burn | catastrophic fluid loss |
| burns are devastating and debilitating because of loss of fluids and electrolytes from the body. How do physicians estimate the extent of burn damage associated with such dangerous fluid loss? | by usin gthe rule of nines |
| if a splinter penetrated the skin into the second epidermal layer of the sole of the foot, which cells would be damaged? | lucidum |
| ___is an inheritated condition that affects the heme pathway, it leaves the skin scarred and gums degenerated and my have led to the folklore about bampires | porphyria |
| vernix caseosa is a ___ | whitish material produced by fetal sebaceous glands |
| the integumentary system is protected by the action of cells that arise from bone marrow nad migrate to the epidermis. which of the follwoing cells serve this function? | macrophages called epidermal dendritic cells |
| nutrients reach the surface of the skin through the process of | diffusing throug hthe tissue fluid from blood vessels in the dermis |
| which of the following is a skin sensory recpetor for touch? | meissners corpuscle |
| an epidermal dendritic cell is a specialized ___ | phagocytic cell |
| the composition of the secretions of the eccrine glands is___ | 99%water, sodium choloride, trace amounts of wastes and vitamin c |
| melanocytes and keratinocytes work together in protectiong the skin from uv damage when keratinocytes | accumulate the melanin granules on their superficial portion forming a uv blocking pigment layer |
| the dermis____ | has two layers |
| in addition to protection(physical and chemical barrier) the skin serves other functions. which of the following is another vital function of the skin? | it converts modified epidermal cholesterol to a vitamin d precursor important to calcium metabolism |
| the epidermis consists of fiver layers of cells each layer with a distinct role to play in the health well being and functioning of the skin. which of the following layers is responsible for cell division and replacement | stratum basale |
| eyebrow hairs are always shorter than hairs on your head because____ | eyebrow follicles are only active for a few months |
| despite its apparent durability the dermis is subject to tearing. how might a person know that the dremis has been stretched and or torn | the apperance of visible silvery white scars is an indication of stretching of the dermis |
| sudoriferous glands are catergorized as two disting types which of the follwoing are the two wypes of sweat glands? | eccrine and apocrine |
| the dermis is a strong flexible connective tissue layer. Which of the follwoing cell types are liekly to be found in the dermis | fibroblasts, macrophages, and mast cells |
| sudoriferous glands vary in distribution over the surface of the body which of the following is corrct | cerumious gland secrete cerumen which is thought to deter insects |
| the ____ gland is a modified sudoriferous gland that secrets wax | ceruminous |
| the papillary layer of the dermis is connective tissue heavily invested with blood vessels the superficial surface has structures called | dermal papillae |
| male pattern baldness has genetic switch that turns on in response to ___ | male hormones |
| the design of a persons epidermal ridges is determined by the manner in which the papille rest upon the dermal ridges to produce the specific pattern known as handprints, footprints and fingerprints. statments is true regarding these prints | they are genetically determined therefore unique to each person |
| the sebaceous glands are simple alveolar gland sthat secrete a substance known as sebum. the secretion of sebum is stimulated____ | by hormones, especially androgens |
| which muscles attached to the hair follicles cause goose bumps? | arrector pili |
| apocine glands which begin to funtion at puberty under hormonal influence seem to play little role in thermoregulation. where would we find these glands inthe human body? | inthe axillary and anogenital area |
| select the most correct statment concerning skin cancer | melanomas are rare but must be removed quickly to prevent them from matastasizing. |
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