Which is one way that skin protect the body from infection?
a. skin keeps germs out of the body.
b. skin keeps mucus out of the body.
c. skin directs sensory messages.
d. skin produces complement proteins.

The correct answer is option A.

Explanation:

The skin refers to the largest organ of the body and is the most essential barrier against the infections. It is the first line of defense in safeguarding the internal tissues from the harmful germs. In case, when the skin gets damaged due to an injury, it becomes easier for the germs to get within the body and leads to infection.  

The skin can also get damaged due to cancer treatments like radiation therapy or surgery, and some other procedures like administering catheters, all these things can make it easy for the germs to get in. However, if the germs are able to cross through the first line of defense, the work of protecting the body from the infections get shifts to the immune system.  

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.