Tubular Reabsorption

Question 1

What is the second basic function of the nephrons and collecting ducts?

Answer 1

Tubular reabsorption which returns most of the filtered water and many of the filtered solutes to the blood.

Question 2

When does filtered fluid become tubular fluid?

Answer 2

Once it enters the proximal convoluted tubules.

Question 3

How much water is reabsorbed?

Answer 3

99%

Question 4

Proximal convoluted tubule cells make the largest contribution, reabsorbing what percentage of filtered water, filtered glucose, or ions?

Answer 4

65% of the filtered water
100% of filtered glucose and amino acids
Large quantities of various ions

Question 5

What does reabsorption of solute promote?

Answer 5

Reabsorption of water, water moves by osmosis into the peritubular capillaries.

Question 6

What do cells distal to the PCT fine tune?

Answer 6

Reabsorption

Question 7

What is the third function of the nephrons?

Answer 7

Tubular secretion

Question 8

Where does secretion take place

Answer 8

All along the renal tubule and collecting ducts and occurs via passive diffusion and active transport

Question 9

What major substances are excreted?

Answer 9

H, K, ammonia, urea, creatinine, drugs like penicillin

Question 10

What is the plasma ph level?

Answer 10

7.35-7.45