How many phase changes are represented in the following heating curve of a pure substance? 
Definitions:
Tubular Reabsorption
The second process of urine formation in which the glomerular filtrate flows into the proximal convoluted tubule.
Glomerular Filtration
The process by which the kidneys filter blood, removing excess wastes and fluids to produce urine.
Efferent Arterioles
Structures that deliver blood to peritubular capillaries that are wrapped around the renal tubules of the nephron in the kidneys.
Peritubular Capillaries
Small blood vessels that surround the tubules in the kidney, involved in the exchange of substances between blood and the filtrate in nephrons.
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