Which of the following is NOT an example of a nonspecific...

Name: Problem 5, Chapter :
Uploaded: 2020-07-09T00:44:44-08:00
Duration: 2 min 13 s
Channel: Dennis Howard
Description: Which of the following is NOT an example of a nonspecific defense mechanism? (A) Skin provides a physical barrier against invasion. (B) Macrophages engulf and destroy foreign particles. (C) An inflammatory response is initiated in response to physical damage. (D) Cytotoxic T-cells destroy cells displaying foreign antigens.

Which of the following is NOT an example of a nonspecific defense mechanism? (A) Skin provides a physical barrier against invasion. (B) Macrophages engulf and destroy foreign particles. (C) An inflammatory response is initiated in response to physical damage. (D) Cytotoxic T-cells destroy cells displaying foreign antigens.

Which of the following is NOT an example of a nonspecific defense mechanism?
(A) Skin provides a physical barrier against invasion.
(B) Macrophages engulf and destroy foreign particles.
(C) An inflammatory response is initiated in response to physical damage.
(D) Cytotoxic T-cells destroy cells displaying foreign antigens.

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Key Concepts

Cytotoxic T-cells

These are a key component of the adaptive immune response. They specifically identify and destroy cells that present foreign antigens, meaning their action is targeted and specific rather than a general defense.

Nonspecific Defense Mechanisms

These defenses provide a broad, non-targeted response to a wide variety of pathogens. They include mechanisms like physical barriers (e.g., skin), general phagocytosis by macrophages, and the inflammatory response, all of which do not depend on recognizing specific antigens.

Adaptive Immunity

This is a specialized defense system that responds to specific pathogens with tailored responses. It involves lymphocytes such as cytotoxic T-cells and B-cells, which recognize and remember specific antigens, enabling targeted immune responses.

Innate Immunity

This is the body's first line of defense that includes physical barriers like the skin, chemical barriers, and cellular defenses such as phagocytes and the inflammatory response. It provides a general response to pathogens without specific recognition.

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