Question

Name Section UNIT Ch all REVIEW 1 Fill in the blanks: The presents us that tends to favor filtration is known as the and the two pressures that oppose filtration are the and the 2 The overall force that drives glomerular filtration is known as the a glomerular osmotic pressure. b. capsular hydrostatic pressure. C. glomerular filtration pressure. d. net filtration pressure 3 Fill in the blanks: The rate of filtrate formation is known as the and averages about 4 What is the purpose of tubular secretion? a. To remove substances in the blood and place them into the filtrate. b. To reclaim 99 percent of the water from the filtrate To reclaim electrolytes, glucose, and amino acids from the filtrate. d. Both band care correct. e. Both a and b are correct. 5 Which is the correct pathway that a substance takes when it is reabsorbed from the filtrate? a. Filtrate between or through tubule cells interstitial fluid - blood in peritubular capillaries b. Blood in peritubular capillaries interstitial fluid between or through tubule cells filtrate C. Filtrate between or through tubule cells interstitial fluid blood in glomerular capillaries d. Filtrate interstitial fluid cytosol of tubule cells blood in glomerular capillaries 6 Which of the following is not a component of the filtration membrane? a. Glomerular endothelial cells. b. Podocytes C. Smooth muscle d. Basal lamina Urinary System Physiology - UNIT 26 70

Answer 1

1. The pressure which favours filtration is glomerular hydrostatic pressure and those which opposes filtration of blood are glomerular osmotic pressure and Bowman's space hydrostatic pressure.

2. The correct answer is capsular hydrostatic pressure. The process by which glomerular filtration occurs is called renal ultrafiltration and occurs by hydrostatic pressure.

3. The rate of filtrate formation is known as the glomerular filtration rate (GFR), and the average about 120 ml/ min.

4. Option A is correct. Tubular secretion removes the substance from blood and puts it back into the filtrate. The absorption of water and glucose are a function of tubular reabsorption.

5. The correct option is A.  The filtrate absorbed in the glomerulus flows through the renal tubule, that is put into the peritubular capillaries that are closely associated with the nephron so that they are also returned to the renal vein and the inferior vena cava.

6. Smooth muscles are not part of the filtration membrane. This membrane has three major components: the fenestrated endothelial cell, the glomerular basement membrane (GBM), and the podocyte with their “slit diaphragms.