Inductive reasoning means developing a general conclusion from a collection of observations. Deductive reasoning means making a specific statement based on a general principle. Scientific method is a process consisting of making observations, developing a hypothesis, and testing that hypothesis.
Na/K concentration in and out of the cell at the homeostatic level. It does this by pumping sodium and potassium ions in and out when it's needed of it in order to maintain the concentration of both ions stable across time.
In medieval towns, unhealthy living conditions led to the spread of illness. The town were very dirty places. There was no running water in homes, and people used outdoor privies or chamber pots instead of bathrooms, which they emptied into nearby streams and canals.
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