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30
votes
5answers
15k views

Why is cold water more refreshing than warm water?

Obviously, the temperature of water does not affect its chemical composition. At least not in the ranges we are likely to drink it in. Yet it is clearly far more pleasant and refreshing to drink cool ...
12
votes
3answers
110 views

How does the brain immediately know when one's thirst has been quenched?

The question struck me the other day when I drank a glass of water. I understand that there are at least two conditions under which the brain signals thirst: extracellular thirst, when there's not ...
9
votes
1answer
165 views

What are the survival limitations of alcohol?

This question was inspired by watching one of the Pirates of the Caribbean movies; particularly where Jack Sparrow allegedly survives on a desert island by finding an unlimited supply of rum. I've ...
6
votes
0answers
69 views

How to tell if a beverage will hydrate or dehydrate? [duplicate]

Beverages of any type generally contain some measure of water. However, in the case of some liquids, the non-water components take more water from the human body to filter out than the water contained ...
5
votes
2answers
2k views

Do we need to drink less water in humid weather than in dry weather?

From my understanding, humid weather means that the air has a lot of water in it. Therefore, someone who lives in this kind of weather would be hydrating himself just by breathing. Does that mean ...
3
votes
1answer
277 views

Are there human-ingestible liquids that do not contain water?

My son asked me a question that stumped me: Is there anything a human can drink that does not contain water? It stemmed from a conversation in beverages in general where I was pointing out that they ...
1
vote
2answers
5k views

What happens if an IV drip with a saline solution slips out of the vein, but keeps dripping into the body?

A patient has a saline solution IV drip into the vein. They have somehow moved around and the needle has fallen out of the vein, but remained in the body. Nobody has noticed and for a few hours water ...
0
votes
0answers
15 views

Can overhydration cause a drop in hemoglobin?

I am trying to understand the mechanism by which overhydration affects hemoglobin and oxygen intake. Does the water first depletes the buffers such as ferritin storages? What about haematocrits? In ...
0
votes
0answers
11 views

how is humidity related to amount of water we should drink [duplicate]

Is there any kind of relation between humidity and the amount of water we should drink. I know there is a relation between the temperature and the amount of water needed by the body. Do we need to ...