The graph below was constructed using the class data that was collected during t

Question

The graph below was constructed using the class data that was collected during the Urination Lab. The data show that all four groups had an increase in the volume of urine produced each minute. Physiologically, what occurred in each person to bring about this increase in urine flow rate? Urine Flow Rate Vs. Time 14 ?12 Water Cranberry Gatorade 60 90 120 Time (min) O a. The amount of atrial natiuretic peptide (ANP) released into the blood was decreased b. The amount of aldosterone released into the blood was increased. C. The amount of vasopressin released into the blood was increased ? d. The amount of renin released into the blood was increased e. The amount of angiotensin I (ANG II) present in the blood was decreased.

Explanation / Answer

ANP has diuretic property,wich means that urine flow rate will increase as the ANP increases .

Aldosterone is secreted by the adrenal glands , It causes retention of sodium and along with it the retention of water, it will decrease the urine flow rate.

Vasopressin is a vasoconstrictor, which causes constriction of the afferent arterioles , which decreases the GFR, ultimately leading to the decrease in urine flow rate.

Renin , which is secreted by the Juxta Glomerular Cells , Causes activation of angiotensinogen into angiotensin I which is later converted to angiotensin II in the lungs. Angiotensin has vaso constrictor properties, which will cause decreased GFR and decreased output.

If the Angiotensin II is decreased, the overall vasoconstriction will decrease, which will cause increased GFR and hence increased urine out flow rate.

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