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Pee Values

by Greg Crowther


Context

This song covers a simple but vital equation in kidney physiology: the rate at which a substance is excreted equals the rate at which it is filtered plus the rate at which it is secreted, minus the rate at which it is reabsorbed.


Lyrics

Solutes in the plasma in the kidney go a-tourin'.
(Push some solutes out; pull some solutes back!)
Some the plasma keeps, and some leave in the urine.
(Push some solutes out; pull some solutes back!)
Three different processes control what you're releasin':
Filtration plus secretion minus reabsorption is excretion.
(Push some solutes out; pull some solutes back!)
(Push some solutes out; pull some back!)


Other Files

karaoke

sheet music


Lesson Plan

Songs like this one can be used during class meetings and/or in homework assignments. Either way, the song will be most impactful if students DO something with it, as opposed to just listening.

An initial, simple follow-up activity could be to answer the study questions below. A more extensive interaction with the song might entail (A) learning to sing it, using the audio file and/or sheet music as a guide, or (B) designing kinesthetic movements ("dance moves") to embody it. The latter activity should begin with students identifying the most important or most challenging content of the song, and deciding how to illustrate that particular content.


Study Questions

(1) Does secretion of a solute by the kidney increase or decrease the rate at which it is excreted?

(2) Is it possible for the excretion rate of a solute to be 0? If so, how?

(Answers may be found on the answers page.)