Biol 2120 Quiz Renal March 21. 2018 Name 1. The filtration membrane contain 3 la
ID: 3513968 • Letter: B
Question
Biol 2120 Quiz Renal March 21. 2018 Name 1. The filtration membrane contain 3 layers name two of them 2. The glomerulus contains an afferent and efferent arteriole, why are they both arterioles? 3. Which pressure promotes filtration in the glomerulus? two opposing pressures what are the and 4. GFR is autoregulated by intrinsic and extrinsic factors. The dominate intrinsic factor is IF GFR is low, what does this intrinsic factor do? 5. The backup intrinsic factor is called the the cells control this system. What are these cells monitoring? 6. Increased levels of NaCI in the distal convoluted tubule tell you that GFR is (high or low)? system. Does this system increase 7. The extrinsic regulator GFR is or decrease GFR? 8. If MAP exceeds 180mmHg, what happens to GFR?Explanation / Answer
Ans. 1.
a. The outer epithelium consisting of Podocytes.
b. The inner epithelium (Fenestrated Endothelium).
Ans. 2.
The afferent arteriole branch from Renal artery hence it is called arteriole. The afferent arteriole carries blood towards the kidney(Glomerulus) whereas Efferent arteriole carries blood away from Glomerulus.
Ans. 3.
Glomerular blood hydrostatic pressure promotes filtration in the Glomerulus.
The two opposing pressures are: Capsular hydrostatic pressure and Blood colloid osmotic pressure.
Ans. 4.
The dominant intrinsic factor is Renal Autoregulation involving feedback mechanism.
The low GFR or drop in GFR causes dilation of afferent arteriole which increases renal blood flow there by increasing GFR. This all happens via Renal Autoregulation involving feedback mechanism.
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