Such a loss of water would trigger hypovolemic thirst, which is typically caused by bleeding, sweating, or other types of fluid loss. Here, "thirst is based on low volume" (Kalat 307). The water you drink is being lost out of the tube. As such, it is not filling the necessary level of water within the body, causing hypovolemic thirst to induce the individual to want to drink even more. Thus, if you had a tube letting water out of your body, you would still remain thirsty and would drink even more to try to compensate. Question 4

Some women crave salt during pregnancy because salt helps the body retain fluids. Pregnant women need to retain more water in order to help the progression of the pregnancy. Since sodium retains water, this may be a reason why some women crave salt during pregnancy. Moreover, in the first trimester, the levels of progesterone can increase...

Then, pregnant women need to increase their salt intake in order to compensate for lower sodium levels in their bodies.
Question 5

When insulin levels are higher, the body tends to break down food faster. Often during the day, most people ingest higher carbohydrate foods, increasing the levels of insulin needed in their bodies to digest such meals. The more insulin, the faster the digestion process. However, people do not tend to eat such high carbohydrate foods at night, and as such, there is a lesser level of insulin. With lower levels of insulin comes decreased speeds for food digestion, allowing individuals to not be hungry as fast as they are during the context of the day when they are eating more.

References

Kalat, James W. (2012). Biological Psychology. 11th ed. Wadsworth Publishing.