Thick ascending limb is called the diluting segment because NaCl is reabsorbed but water is not reabsorbed along with it 

TLS Online TPP Program

#Id: 1171

#Unit 7. System Physiology – Animal

Glomerular hydrostatic pressure is determined by three variables: 

1. Arterial pressure

2. Afferent arteriolar resistance

3. Efferent arteriolar resistance

TLS Online TPP Program

#Id: 2566

#Unit 7. System Physiology – Animal

Tubular reabsorption is quantitatively large & highly selective.

TLS Online TPP Program

#Id: 2567

#Unit 7. System Physiology – Animal

Reabsorption

Water and many solutes (e.g., Na+, Cl−, HCO3−, glucose, amino acids, urea, Ca2+, Mg2+, phosphate, lactate & citrate) are reabsorbed from the glomerular filtrate into the peritubular capillary blood.

TLS Online TPP Program

#Id: 2568

#Unit 7. System Physiology – Animal

Secretion

A few substances (e.g., organic acids,

organic bases, K+) are secreted from peritubular capillary blood into tubular fluid for excreting substances in the urine.

TLS Online TPP Program

#Id: 2569

#Unit 7. System Physiology – Animal

The mechanisms for reabsorption involve transporters in the membranes of the renal epithelial cells.

TLS Online TPP Program

#Id: 2570

#Unit 7. System Physiology – Animal

For a substance to be reabsorbed, it must first be transported

Across the tubular epithelial membranes into

the renal interstitial fluid and then

Through the peritubular capillary membrane back into the blood