FLAC is free and open source! FLAC is short for Free Lossless Audio Compression. It is an open source codec and file format which provides a perfect quality audio file. FLAC files usually contain CD quality audio, but can also support almost any audio data with a wide range of sample frequencies, amount of channels and bits per sample. FLAC provides a smaller size of file than PCM WAV (about half the size), but much larger than lossy codecs like MP3.
The Afferent and Efferent arterioles will controls the renal plasma flow and the GFR. The more blood that is kept in the glomerulus (ie. afferent dilation and efferent constriciton) will increase the glomerular pressure and then increase the GFR while decreasing the renal plasma flow.
The afferent arteriole is in red, and the efferent arteriole in blue. The glomerular filtration rate (GFR) depends on the pressure difference between the two, which affects the hydrostatic pressure at the glomerulus. Also, note that vasodilation has the opposite effect of vasoconstriction on GFR. (For a nice image and explanation, look at Figure 6 here) So: 1  Constriction of the afferent arteriole decreases the blood flow into the glomerulus and thus the glomerular hydrostatic pressure, which leads to a decrease in GFR. In contrast, constriction of the efferent arteriole decreases blood flow out of the glomerulus, and this increases the glomerular hydrostatic pressure and leads to an increase in GFR.