An example of a nonspecific defense provided by the skin is
A)antibodies.
B) fever.
C) proteins.
D) sweat.
is it B?
No Its D). Actually
No, option B (fever) is not an example of a nonspecific defense provided by the skin. The correct answer is D) sweat.
To understand why, let's break it down:
Nonspecific defense mechanisms are those that provide a general, non-selective response against various pathogens (like bacteria or viruses) without specifically targeting them. These mechanisms act as barriers or deterrents to prevent the entry or spread of pathogens into the body.
The skin is one of the primary nonspecific defense mechanisms of the human body. It acts as a physical barrier, protecting the body from external threats. It has several features that help defend against pathogens, such as:
1. Antibacterial properties: The skin produces natural antimicrobial substances, such as defensins and cathelicidins, that can kill or inhibit the growth of bacteria.
2. Proteins: The skin contains proteins, such as keratin, which forms a tough and resistant outer layer, protecting the underlying tissues from damage and preventing the entry of pathogens.
3. Sweat: Sweat glands in the skin secrete sweat, which plays a role in nonspecific defense. Sweat contains various antimicrobial proteins, including dermcidin, which has antimicrobial properties and helps kill some bacteria on the skin's surface.
These features work together to provide a nonspecific defense against pathogens that come into contact with the skin. Option D) sweat is an example of a nonspecific defense provided by the skin because it contains antimicrobial proteins.
So, the correct answer is D) sweat.