1. What is the functional unit of the kidney called: Answer Nephron 2. The only surface inside the nephron where cells are covered with microvillito increase the reabsorptive surface area is called the: Answer Proximal convoluted tubules 3. What part of the kidney controls renal blood flow, glomerular filtration, andrenin secretion: Answer Juxtaglomerular apparatus (JGA) 4. The glomerular filtration rate is directly related to which factor: Answer Perfusionpressure in the glomerular capillaries 5. What effects do exercise and body position have on renal blood flow: Answer Theyactivate renal sympathetic neurons and cause mild vasoconstriction 6. Blood vessels of the kidneys are innervated by the: Answer Sympathetic nervoussystem 7. When renin isreleased,it is capable of which action: Answer Formation of angiotensinI 8. What effect do natriuretic peptides have during heart failure when the heartdilates: Answer Inhibits renin and aldosterone