An early sign of acne development is when: a. hair, sweat, and keratinoctes fill

Question

An early sign of acne development is when: a. hair, sweat, and keratinoctes fill the narrow follicle producing a plug. b. hair, sebum, and keratinocytes fill the narrow follicle producing a plug. c. hair, cerumen, and keratinocytes fill the narrow follicle producing a plug d. hair and keratinocytes fill the narrow foliage producing a plug e. All of the above f. None of the above The basic acene lesion is called the comedo. If the plugged follicle, or comedo, stays beneath the acne a skin, it is called: a. A closed comedo and produces a white bump called a whitehead b. An open comedo and produces a blackhead c. A closed comedo and produces a white bump called a blackhead d. An open comedo and produces a whitehead e. All of the above f. None of the above Examples of allergens include: a. Pollens b. Dust mites c. Molds d. Dander e. All of the above f. None of the above The allergic person develops this type antibody in response to certain normally harmless foreign of substances, such as cat dander. a. IgG b. IgM c. IgD d. IgE e. IgA f. All of the above g. None of the above Lyme disease is a tick-borne illness that causes signs and symptoms ranging from rash and flu-like and like fever and body aches to more serious ones including joint swelling, weakness, fatigue and temporary paralysis. The disease is a. Borrelia burgdorfei. b. Tick c. Herpes simplex virus (HSV) d. Malassezia e. All of the above f. None of the above The absolute best active ingredient in a medication for acne control is: a. Retinoids, vitamin A derivatives b. Salicylic acid c. Alcohol d. Benzoyl peroxide e. All of the above f. None of the above

Explanation / Answer

6. The hair, sebum, and keratinocytes that fill the narrow follicle may produce a plug, which is an early sign of acne. The plug prevents sebum from reaching the surface of the skin through a pore. The mixture of oil and cells allows bacteria Propionibacterium acnes (P. acnes) that normally live on the skin to grow in the plugged follicles. These bacteria produce chemicals and enzymes and attract white blood cells that cause inflammation. (Inflammation is a characteristic reaction of tissues to disease or injury and is marked by four signs: swelling, redness, heat, and pain.) When the wall of the plugged follicle breaks down, it spills everything into the nearby skin—sebum, shed skin cells, and bacteria—leading to lesions or pimples. So (b)

7.If the comedo stays beneath the skin, it is called a closed comedo and produces a white bump called a whitehead. So (a)

8. (e)

9. In case of a person suffering from allergy for a particular substance, the lymphocytes fail to recognize a foreign harmless particle leading to the production of IgE antibodies in very large quantities. So (d)

10. (a) Borrelia burgdorferi

11.Benzoyl peroxide kills P. acnes, and may also reduce oil production thereby reducing acne instances. So (d)

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