Q. 6
The following abbreviations are used in the context of excretory functions, what do they stand for?
a. ANF
b. ADH
c. GFR
d. DCT
Answer :
The following abbreviations that are used in the context of excretory functions stand for:
a) ANF: Atrial Natriuretic Factor
Atrial natriuretic factor (ANF) is a hormone that acts on the kidney to increase the sodium excretion and glomerular filtration rate and it also antagonizes the renal vasoconstriction. In addition to that renin secretion is also inhibited.
b) ADH: Anti-Diuretic Hormone:
Antidiuretic hormone (ADH) or vasopressin is released from the neurohypophysis. ADH facilitates water reabsorption from latter parts of the tubule thus preventing diuresis.
Diuresis is the excessive urine production.
c) GFR: Glomerular Filtration Rate:
The rate of blood flow through the kidneys is known as the glomerular filtration rate, or GFR (The glomerulus or glomeruli are microscopic bundles of blood vessels present inside the nephrons).
d) DCT: Distal Convoluted Tubule
It is a portion of the functional unit of kidney called nephron which lies between the loop of Henle and the collecting tubule. Once the filtrate passes through the ascending limb of Henle, it then enters the distal convoluted tubule (duct of the renal tubule present in the cortex of kidney) that selectively reabsorbs minerals like calcium, sodium, and chloride thus regulating the pH of urine by secreting H+ ions and absorbing bicarbonate ions.
Rate this question :






















Label the parts in the following diagram.
Biology - Exemplar
Name two actively transported substances in Glomerular filtrate.
Biology - ExemplarThe following abbreviations are used in the context of excretory functions, what do they stand for?
a. ANF
b. ADH
c. GFR
d. DCT
Biology - Exemplar
Show the structure of a renal corpuscle with the help of a diagram.
Biology - ExemplarWhere does the selective reabsorption of Glomerular filtrate take place?
Biology - ExemplarMatch the terms given in Column I with their physiological processes given in Column II and choose the correct answer
Column I Column II

Biology - Exemplar
Mention the substances that exit from the tubules in order to maintain a concentration gradient in the medullary interstitium.
Biology - ExemplarThe glomerular filtrate in the loop of Henle gets concentrated in the descending and then gets diluted in the ascending limbs. Explain.
Biology - ExemplarWhich of the following statements is incorrect?
Biology - ExemplarThe pH of human urine is approximately
Biology - Exemplar