Lab Quiz

Renal System Physiology Lab Quiz

This activity contains 20 questions.

	Refer to Activity 1: Investigating the Effect of Flow Tube Radius on Glomerular Filtration. What happens to the glomerular filtration rate as the afferent radius is increased?   The glomerular filtration rate decreases, due to the decreased blood flow into the glomerulus. The glomerular filtration rate increases, due to the increased blood flow into the glomerulus. There is no change in the glomerular filtration rate. The glomerular filtration rate decreases, due to increased blood flow into the glomerulus.

	If the efferent radius is increased, what happens to the glomerular filtration rate?   Glomerular filtration rate would not change. Glomerular filtration rate increases slightly. Glomerular filtration rate increases drastically. Glomerular filtration rate decreases.

	Refer to Activity 2: Studying the Pressure on Glomerular Filtration. What happened to the glomerular filtration rate as the beaker pressure was increased?   The glomerular filtration rate fluctuated as the collecting tubules became clogged. Glomerular filtration rate was not affected. Glomerular filtration rate was decreased Glomerular filtration rate was increased.

	Why does an increase in pressure result in a faster glomerular filtration rate?   Because the net filtration pressure increased. Because the glomerular hydrostatic pressure decreased. Because the glomerular osmotic pressure increased. Because the net filtration rate decreased.

	Refer to Activity 3: Assessing Combined Effects on Glomerular Filtration. What happened when the valve was closed?   The urine output decreased slightly. The urine output increased significantly. The urine output became zero. The urine output fluctuated.

	What would happen to total glomerular filtration and urine production in a human kidney if all the collecting ducts were blocked?   The urine output would increase slightly. The urine output in the kidney would be zero. The urine would be dumped directly into the bladder bypassing the renal pelvis. The urine output would decrease slightly.

	If a single nephron was blocked, how would this affect overall kidney function?   It would not be noticeably affected. It would cause a blockage cascade to the other nephrons. It would signal the shut down of surrounding nephrons. It would cause a noticeable difference in kidney function.

	If the glomerular filtration was zero, how would the kidneys be affected?   The afferent arteriole would flow blood directly into the proximal convoluted tubule. The kidneys would not function. The kidneys would redirect filtrate flow through the vasa recta. Kidney function would be unaffected.

	What are ways the body could increase glomerular filtration rates in a human kidney? Choose the best answer.   By dilating the afferent arteriole. By constricting the efferent arteriole By dilating the efferent arteriole. By constricting the afferent arteriole. By either dilating the afferent arteriole or by constricting the efferent arteriole.

	If the pressure were increased in the beaker, what could be done to keep the glomerular filtration rate constant?   The afferent arteriole could be dilated. The efferent arteriole could be constricted. The afferent arteriole could be constricted. The efferent arteriole could be dilated.

	Refer to Activity 4: Exploring the Role of the Solute Gradient on Maximum Urine Concentration Achievable. In the presence of ADH, what happened to the urine concentration as the gradient concentration was increased?   The urine concentration decreased. The urine concentration remained constant. The urine concentration increased.

	What factor limits the maximum possible concentration?   The osmolarity of the interstitial gradient. The blood pressure. The blood volume. The osmolarity of the GFR.

	Refer to Activity 5: Studying the Effect of Glucose Carrier Proteins on Glucose Reabsorption. What happened to the amount of glucose present in the urine as the number of glucose carriers was increased?   The amount of glucose present decreased. The amount of glucose present remained constant. The amount of glucose present increased.

	What would happen if there was more glucose than could be transported by the available number of glucose carrier molecules?   The body would recruit more glucose transport proteins to that site. Glucose would be reabsorbed by the distal convoluted tubule. Glucose would leak out of the collecting tubules back into the interstitial fluid. Glucose would be present in the urine.

	Why would we expect to find glucose present in the urine of a diabetic person?   The nephrons do not function correctly. The blood glucose levels are too low to filter out any glucose. The GFR is too low. There is too much glucose in the filtrate to be reabsorbed.

	Refer to Activity 6: Testing the Effect of Hormones on Urine Formation. What happened to the urine volume when aldosterone was added?   The urine volume increased drastically. The urine volume increased slightly. The urine volume remained the same. The urine volume decreased.

	What happened to the urine volume when ADH was added?   The urine volume decreased greatly. The urine volume increased slightly. The urine volume increased greatly. The urine volume remained the same.

	What happened to the amount of potassium present in urine when ADH was added?   The amount of potassium in the urine was higher. The concentration of potassium was higher when ADH was present, but the actual amount of potassium in the urine remained the same. The amount of potassium in the urine was lower. The addition of ADH resulted in the disappearance of potassium from the urine.

	How would you compare the effects of aldosterone to the effects of ADH?   They are antagonistic to one another. Aldosterone and ADH have opposite effects. Aldosterone and ADH are dependent upon one another. They are similar to one another.

	Consider this situation: We want to reabsorb sodium ions, but do not want to increase the volume of the blood by reabsorbing water from the filtrate. Assuming that aldosterone and ADH are both present, how would you adjust the hormones to accomplish the task?   Increase aldosterone / decrease ADH Increase aldosterone / increase ADH Decrease aldosterone / decrease ADH Decrease aldosterone / increase ADH

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