What is the function(s) of the nephron? (Select all that apply).
Reabsorption
Filtration
Storage
Increase RBC production
Secretion
Correct Answer : A,B,E
A. Reabsorption: The nephron reabsorbs water, glucose, and electrolytes from the filtrate back into the blood.
B. Filtration: The glomerulus filters blood, initiating urine formation by removing waste, water, and solutes.
C. Storage: Urine storage occurs in the bladder, not the nephron.
D. Increase RBC production: While the kidneys release erythropoietin, which stimulates RBC production, this is not a nephron-specific function.
E. Secretion: The nephron actively secretes waste products like hydrogen ions and drugs into the tubule for excretion.
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Related Questions
Correct Answer is B
Explanation
A. Renal capsule: This is the outer protective covering of the kidney and does not form urine.
B. Nephron: The nephron is the functional unit of the kidney that performs filtration, reabsorption, and secretion to form urine.
C. Renal pyramid: These structures contain parts of the nephron and collecting ducts but do not themselves make urine.
D. Ureter: The ureter transports urine from the kidneys to the bladder; it does not produce urine.
Correct Answer is B
Explanation
A. Pressure within the renal tubules: This is tubular pressure, which opposes filtration and is not the driving force.
B. Blood pressure: Blood pressure within the glomerular capillaries provides the main hydrostatic pressure driving glomerular filtration.
C. Intrathoracic pressure: This affects respiration and venous return, not glomerular filtration.
D. Intraabdominal pressure: Elevated intraabdominal pressure can impair renal perfusion, but it does not drive filtration.
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