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Which statement accurately defines psoriasis?

A.

Psoriasis is an autoimmune disease that primarily affects the respiratory system.

B.

Psoriasis is a bacterial skin infection caused by Streptococcus bacteria.

C.

Psoriasis is a chronic inflammatory skin condition characterized by red, scaly patches.

D.

Psoriasis is a type of skin cancer that arises from melanocytes.

Answer and Explanation

The Correct Answer is C

Explanation: Psoriasis is a chronic skin disorder that results from an overactive immune response, leading to the rapid growth of skin cells. This causes red, raised, and scaly patches to form on the skin, which can be itchy and painful.

Incorrect choices: a. Psoriasis is not primarily an autoimmune disease affecting the respiratory system. It is primarily a skin condition, although it may be associated with certain autoimmune factors.

b. Psoriasis is not caused by a bacterial infection. It is a non-infectious skin disorder with an underlying immune-mediated mechanism.

d. Psoriasis is not a type of skin cancer. It is a benign skin condition that does not involve the malignant transformation of melanocytes.


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Related Questions

Correct Answer is C

Explanation

Explanation: Genetic predisposition in psoriasis contributes to the development of the condition by causing abnormal functioning of the immune system. Certain genes involved in the immune response are associated with psoriasis, leading to an overactive immune system that triggers inflammation and skin cell overproduction.

Incorrect choices: a. Genetic factors increase skin sensitivity to environmental irritants: While some environmental triggers can worsen psoriasis symptoms, genetic predisposition primarily influences the immune system's response, not skin sensitivity to irritants.

b. Genetic factors cause an allergic reaction to certain foods: Psoriasis is not primarily an allergic reaction, and genetic factors do not cause allergic reactions to specific foods in this context.

d. Genetic factors impair the skin's barrier function: Psoriasis is not caused by a skin barrier dysfunction. The condition is characterized by immune system dysregulation and the subsequent inflammation and rapid skin cell turnover.

Correct Answer is A

Explanation

Explanation: Psoriasis commonly affects the scalp and nails in addition to other areas of the body. Scalp psoriasis can cause flaking and scale buildup on the scalp, while nail psoriasis can lead to pitting, discoloration, and thickening of the nails.

Incorrect choices: b. Buttocks and thighs: While psoriasis can occur in these areas, it is not one of the most common areas affected.

c. Lower back and shoulders: These areas can be affected by psoriasis, but they are not the most commonly affected regions.

d. Upper arms and neck: Psoriasis can occur on the upper arms and neck, but it is not the most frequently affected area.

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