The patient may be asked to perform some exercise before the test in order to increase the heart rate, or they may be administered with medicine that increase the heart rate. A doppler echocardiogram is performed to examine the blood flow in the heart, by measuring the speed and direction of the blood flow. This test is usually performed as a part of the TTE and TEE test.
Reabsorbtion. Occuring more commonly within the nephron system than filtration, this is a form of active transport which takes the the useful substances for the body from the tubules and places them back into the blood filled capillaries.ithin the LOOP OF HENLE, the descending limb allows for the reabsorbtion of water through osmosis whereas the ascending limb allows for the passive and active transport of salts such as sodium to move out of the tubules and be reabsorbed.
Tubular Reabsorption of Sodium, Chloride and Fluids. 99% of the glomerular filtrate volume (primary urine, 120 ml/min), 99% of the filtrated sodium and 99% of the filtered Chloride are reabsorbed in the renal tubules of the nephron. The reabsorption is energy consuming process; the needed energy rises linearly with the NaCl-Reabsorption.