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Human blood, saliva, tears, bile, and urine are close to neutral. Why is human stomach acid very acidic?
 

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Beverley Smith
Beverley SmithLv2
16 Feb 2019

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Related questions

Below are two quotes from the CDC about Hantavirus:

"Researchers believe that people may be able to get the virus ifthey touch something that has been contaminated with rodent urine,droppings, or saliva, and then touch their nose or mouth."

and:

"You cannot get the virus from touching or kissing a person whohas HPS."

This is hard to believe. So, since human saliva is not aproblem, can you be contaminated by human urine or human droppings?The only way for me to interpret this logically is to say that thisvirus lives at the end of the digestive tract (for both rodents andhumans) and people can be kissed because they have much betterhygiene than rodents. Is there a better interpretation?

Also, is there a simple reason why Hantavirus leaves the mouth(moving to the end of the digestive tract) of an infected animal,but influenza does not?

Question; which of the following is true about the digestive tract ?

a)The acid in the stomach completely digests the food that you swallow

b)The saliva in your mouth digests all the food that you eat

c)Digestion and absorption cannot happen unless all macromolecules

d)Bacteria are responsible for all digestive processes in the human body

f)Most of the digestion and absorption of food occurs in the small intestine.

Whilst on a recent refresher course it was highlighted that whenconsidering risk of exposure to infection from bodily fluids weshould be aware of two distinct risk levels:

High Risk:

  • Blood
  • Semen
  • Vaginal Secretions
  • Diarrhea

Low Risk:

  • Saliva
  • Vomit
  • Urine
  • CSF (Cerebrospinal fluid)

Why is it that some bodily fluids are a greater infection riskthan others? Is it related to the fluids themselves or the speciesof pathogen that are located within them?

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