PhysioEx 9 Exercise- Renal
Activity 1
1. What are the two main parts of the nephron?
the renal corpuscle and the renal tubule
2. Which of the following describes the order in which blood flows through the nephron?
afferent arteriole, glomerulus, efferent arteriole
3. Which of the following is NOT a function of the kidneys?
exchange of oxygen and carbon dioxide with the tissues
4. Which of the following should NOT be found in the filtrate in the Bowman's capsule?
white blood cells
5. Which structures form the filtration membrane in the nephron?
glomerulus and the glomerular capsule
6. Which of the following resulted in an increase in glomerular filtration rate?
decreasing the efferent arteriole diameter and increasing the afferent arteriole diameter
7. Which of the following resulted in a decrease in glomerular capillary pressure?
increasing the efferent arteriole diameter and decreasing the afferent arteriole diameter
8. What is the normal range for glomerular filtration rate?
80 - 140 ml/min
Activity 2
1. What is(are) the driving force(s) for filtration in the nephron?
hydrostatic pressure gradients, osmotic pressure gradients and Starling forces
2. The functions of the nephron include all of the following EXCEPT
glomerular secretion
3. In this activity, we will explore the effect of
blood pressure on glomerular filtration rate
4. What is the name for the "ball" of capillaries found in the renal corpuscle?
glomerulus
5. As the pressure in the beaker was increased, which of the following occurred?
Glomerular filtration rate increased, and urine volume increased.
6. The pressure in the left source beaker simulates
blood pressure
7. With the valve between the collecting duct and the urinary bladder closed,
urine volume was zero
8. With the valve between the collecting duct and the urinary bladder closed and with the pressure increased,
the glomerular filtration rate increased and the glomerular pressure increased
Activity 3
1. Altering the radii of the afferent and efferent arterioles provides for
glomerular filtration rate homeostasis and glomerular hydrostatic pressure homeostasis
2. Because the alteration of the afferent or efferent arteriole occurs within the nephron, we refer to this mechanism as
intrinsic
3. Which of the following would decrease glomerular filtration rate?
increasing the efferent arteriole radius and decreasing the afferent arteriole radius
4. In this activity, the drain beaker (second beaker in the flow) simulates the
renal vein
5. When the beaker pressure was lowered, which of the following decreased?
glomerular pressure, glomerular filtration rate and urine volume
6. When blood pressure increases, what changes can occur to maintain glomerular filtration rate?
constriction of the afferent arteriole and dilation of the efferent arteriole
7. When the efferent arteriole constricts,
the back pressure in the Bowman's capsule increases
Activity 4
1. Interstitial fluid is located in the
spaces surrounding the kidney tubule
2. Secretion of ADH would
decrease urine output
3. The reabsorption of water and solutes
is passive, depends on concentration gradients and is into the peritubular capillaries
4. When ADH is present in the filtrate,
urine concentration increases
5. What happened to the urine volume when the solute gradient in the interstitial space was increased?
The urine volume decreased.
6. What happened to the urine concentration when the solute gradient in the interstitial space was increased?
The urine concentration increased.
7. What will happen to the urine volume if ADH is NOT added to the collecting duct?
The urine volume will increase.
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