First slide

Disorders of the Excretory System

Question

Use of an artificial kidney during hemodialysis may result in
(A) nitrogenous waste build-up in the body
(B) non-elimination of excess potassium ions
(C) reduced absorption of calcium ions from gastro-intestinal tract
(D) reduced RBC production.
Which of the following options is the most appropriate?

Difficult

A

(A) and (D) are correct.
B

(A) and (B) are correct.
C

(B) and (C) are correct.
D

(C) and (D) are correct.

Solution

Kidney failure results in uremia. Hemodialysis is a boon for uremic patients. In a kidney failure patient, RBC production tends to be reduced because kidneys fail to produce enough erythropoietin that stimulates erythropoiesis (production of RBC). Also absorption of calcium ions from the gastrointestinal tract tends to be reduced due to the deficiency of calcitriol. Calcitriol is the active form of vitamin D produced in the kidneys under the influence of parathyroid hormone.

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