Dog dog dog dog dog dog dog dog dog dog dog
The question is incomplete. Th ecomplete question is as following:
All of the following protect the skin and mucous membranes from infection EXCEPT
A) multiple layers of cells.
B) tears.
C) saliva.
D) HCl.
E) the "ciliary escalator."
Answer: D) HCl.
Explanation:
- The epidermis, the outer layer of the skin provides waterproofing and serves as a barrier to infection and other laers also sustain any type of injury.
- Tears wash out foreign bodies which enter the eye. In addition, tears contain a substance called lysozyme which has an antibacterial function and works to prevent microbial invasion and infection.
- Saliva protects against infection, especially via the innate immune system. This mechanism is an important first-line protection against bacterial and viral infection
- The mucociliar escalator is within the conducting airways and is composed of mucus and cilia that transfer the mucus up and out of the lungs where it can be removed by coughing or swallowing,
Whereas HCL helps in the digestion process.
Hence, the correct option is D.
The influence of personal likes and dislikes is called BIAS.
Midnight Sun, a name given the sun when it can be seen at midnight during the Arctic or Antarctic summer.The midnight sun occurs because the earth's axis tilts toward the sun in summer and away from the sun in winter. Thus the poles are exposed to the sun's rays for six months each. As our planet makes its annual circuit around the sun, parts of the globe experience dramatic seasonal swings thanks to the tilt of Earth’s axis. Between April and September, the northern hemisphere is tipped toward the sun, resulting in longer days and warmer weather. Destinations near and north of the Arctic Circle experience the astronomical phenomenon.
