ANIMAL PHYSIOLOGY
OSMOREGULATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
diffusion and active transport
|
|
|
facilitated diffusion and active transport
|
|
|
osmosis and active transport
|
|
|
facilitated diffusion and passive transport
|
Detailed explanation-1: -The glucose molecule then diffuses across the basal membrane by facilitated diffusion into the interstitial space and from there into peritubular capillaries . Most of the Ca++, Na+, glucose, and amino acids must be reabsorbed by the nephron to maintain homeostatic plasma concentrations.
Detailed explanation-2: -Glucose and amino acids are reabsorbed by Na+-coupled transport in the proximal tubule (see Fig. 11-10A). A family of transport proteins on the apical surface of the epithelial cell uses the diffusion of Na+ down its electrochemical gradient as the energy source.
Detailed explanation-3: -Around 99 percent of filtrate formed is reabsorbed. The epithelial cells of renal tubule reabsorb these substances either by active or passive mechanisms. Substances like glucose, amino acids, Na+, are reabsorbed by active transport.
Detailed explanation-4: -Firstly, the glucose in the proximal tubule is co-transported with sodium ions into the proximal convoluted tubule walls via the SGLT2 cotransporter. Some (typically smaller) amino acids are also transported in this way.