Mini-Quiz Lecture 9.4 - Tubular Reabsorption, Water Conservation, Tubular Secretion (Urinary System)

___________ is a waste product that needs to be disposed of; ___________ is a process that ensures this substance is removed from the blood as much as possible

-Ammonia; tubular absorption

-Ammonia; tubular secretion

-Na+; tubular absorption

-Na+; tubular secretion

Ammonia; tubular secretion

Which of the following substances is reabsorbed so that it can contribute to the osmotic pressure of the interstitial fluid of the kidney?

-Urea

-Ammonia

-Amino acids

-H+

Urea

In general, what is the path for a substance like glucose that is reabsorbed in tubular reabsorption?

-Blood > Glomerular filtrate > Urine

-Never leaves the blood

-Blood > Interstitial fluid > Glomerular filtrate > Urine

-Blood > Glomerular filtrate > Interstitial fluid > Blood

Blood > Glomerular filtrate > Interstitial fluid > Blood

Which of the following substances is secreted in tubular secretion?

-Glucose

-Amino acids

-Na+

-K+

K+

Does tubular reabsorption require active transport?

-Sometimes, it depends on the substance

-No, it uses passive transport

-Yes, it requires active transport

Sometimes, it depends on the substance

Glucose is typically not a component of urine, but when blood glucose levels are very high (as in diabetes) some glucose is excreted in the urine. Which of the following describes the reason why glucose would be present in the urine under these conditions?

-When glucose levels in the blood are high, osmotic pressure is disrupted, slowing the GFR

-When glucose levels in the blood are high, hormonal control of water reabsorption is disrupted

-When glucose levels in the blood are high, glucose is secreted into the renal tubules in an attempt to restore blood glucose homeostasis

-When glucose levels in the blood are high, the concentration of glucose may exceed the transport maximum for glucose reabsorption

When glucose levels in the blood are high, the concentration of glucose may exceed the transport maximum for glucose reabsorption

How does aldosterone increase water conservation?

-By increasing the number of aquaporins on the collecting duct

-By decreasing the number of aquaporins on the collecting duct

-By decreasing the amount of salt reabsorbed and retained in the kidney

-By increasing the amount of salt reabsorbed and retained in the kidney

By increasing the amount of salt reabsorbed and retained in the kidney