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Which of the following immune system components plays a key role in the etiology of psoriasis?

A.

T-cells

B.

B-cells

C.

Platelets

D.

Eosinophils

Answer and Explanation

The Correct Answer is A

Explanation: Psoriasis is an autoimmune disorder in which T-cells, a type of white blood cell, become overactive and trigger an inflammatory response. These T-cells promote the rapid growth of skin cells, leading to the characteristic plaques seen in psoriasis.

Incorrect choices: b. B-cells: While B-cells are important components of the immune system, they are not primarily involved in the etiology of psoriasis. T-cells are the central players in the autoimmune response seen in psoriasis.

c. Platelets: Platelets are primarily responsible for blood clotting and are not directly related to the development of psoriasis.

d. Eosinophils: Eosinophils are a type of white blood cell involved in immune responses against parasitic infections and allergic reactions. While they are important in certain immune processes, they are not the main players in psoriasis etiology.


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Related Questions

Correct Answer is A

Explanation

Explanation: While sunlight can improve psoriasis symptoms in some individuals, direct exposure for extended periods can lead to skin damage and increase the risk of skin cancer. Sunscreen and limited sun exposure are advised.

Incorrect choices: b. "Applying emollients or moisturizers regularly." - Regular application of emollients or moisturizers is important for keeping the skin hydrated and preventing dryness and irritation, which can exacerbate psoriasis.

c. "Engaging in outdoor physical activities." - Engaging in light physical activities is generally encouraged, as long as it does not worsen psoriasis symptoms.

d. "Frequent application of alcohol-based hand sanitizers." - Alcohol-based hand sanitizers can dry out the skin and may irritate psoriasis lesions. It is better to use gentle, non-irritating handwashing techniques.

More questions

Correct Answer is D

Explanation

Explanation: Auspitz sign is a characteristic finding in psoriasis where pinpoint bleeding occurs when scales on the skin are removed. It is caused by the rapid growth and shedding of skin cells, which leads to the formation of delicate blood vessels that bleed easily.

Incorrect choices: a. Auspitz sign is not related to increased bleeding tendency in the patient; it is specific to psoriasis and its characteristic skin changes.

b. Presence of skin pustules and blisters is not associated with Auspitz sign and may indicate other skin conditions.

c. Formation of deep fissures in the skin is not directly related to Auspitz sign, which focuses on the bleeding after scale removal.

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