Solute X is a very small organic molecule present in the blood plasma at approxi

Question

Solute X is a very small organic molecule present in the blood plasma at approximately 17 mM. The average concentration of solute X in the mature urine that is voided from the body is essentially 0 mM. This difference indicates that: e flration rate of solute X must be fairly low B The reabsorption rate of solute X must be fairly high. OCThe secretion rate of solute X must be fairly high O D The excretion rate of solute X must be fairly high If the concentration of Na ions in the interstitial fluid bathing the basolateral side of proximal convoluted tubule epithelial cells was somehow doubled, how would that impact glucose reabsorption into proximal tubule epithelial cells from the nephron lumen on an acute timescale? Ignore all possible consequences of this manipulation on any process other than glucose absorption. O A It would slow reabsorption, because the Nat concentration gradient needed drive secondary active transport of glucose would be reduced O B It would speed reabsorption, because the Na concentration gradient needed drive secondary active transport of glucose would be enhanced. C There would be little impact of this manipulation on glucose reabsorption. O D It would speed reabsorption, because more Na7 ions would be available to be contransported with glucose into the epithelial cells High levels of release from the will lead to the production of urine. O A aldosterone; posterior pituitary, smaller volumes of more concentrated urine O B vasopressin; anterior pituitary; larger volumes of more dilute urine C aldosterone, anterior pituitary; largervolumes of more dilute urine O D asopressin; posterior pituitary, smaller volumes of more concentrated urine

Explanation / Answer

1.A

If the substance is not excreted from the body that means it is not filtered across the glomerulus and is totally bypassed from the excretory system.

2.d

Glut transport is a symport of na and glucose.more na will lead to increase in glucose transport.

3.d

Vasopressin act on dct on help in reabsorption of water making the urine concentrated.

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