By Shel Silverstein
From Shel Silverstein, the New York Times bestselling writer of Where the Sidewalk Ends and The Giving Tree, comes a riotous rhyming photo booklet a few boy and his giraffe!
Featuring rhythmic verse and iconic illustrations, A Giraffe and a Half will go away each reader, old and young, guffawing till the very finish. cherished for over fifty years, this vintage captures Silverstein’s signature humor and style.
If you had a giraffe and he stretched one other part, you are going to have a giraffe and a half. yet what occurs when you glue a rose to the top of his nostril? Or if you happen to used a chair to brush his hair? sign up for this giraffe on a rollicking and ridiculous trip that might allure readers from commencing to finish.
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Additional info for A Giraffe and A Half
The differential equations are empirical or ad hoc descriptions. Having indicated the nature of the equations, we list several points that should be emphasized. First and most important is the fact that we are forced to consider ad hoc equations because there are no first principles to guide us. The quantitative aspects of physiology have not been developed to the stage where such first principles exist; and, indeed, there is no particular reason to believe that a set of first principles like Newton's laws or Kirchhoff s laws will be developed.
468^471). Thus the independence principle has been established. Next it turns out that instead of dealing with the ionic currents / N a and 7 K themselves, it is considerably more advantageous to consider the permeability of the membrane to Na and K ions. In order to clarify this point we first give a formal definition of permeability. Definition. The permeability of the membrane to Na ions is As previously defined, RT [Na] o Xa = *"'" ~F- Wh " RT [Na], ln ~F~ ¥*l- £ N a is called the sodium equilibrium potential; - £ N a is the emf Nerve conduction 38 equivalent to the chemical driving force acting on the Na ions.
In order to do this, we must, of course, utilize the experimental results. , the potassium conductance of the membrane if the membrane potential is equal to the resting potential). Note that since we have not specified g K (g K will be determined later from the experimental data), we do not have an explicit value for n0. But since g K can be determined independently from the experimental data, n0 has a definite value that we can obtain from the experimental data. Now suppose a voltage-clamp experiment is performed in which V is changed suddenly from 0 to a nonzero value.
A Giraffe and A Half by Shel Silverstein