The composition of glomerular filtrate differs from that of plasma by including
A)many different substances that are absent from plasma.
B)the same substances as plasma except for larger protein molecules.
C)less water and electrolytes than does plasma.
D)much more uric acid and creatinine than plasma.

Question

Quizplus · Accepted Answer

Glomerular filtrate is formed from plasma that is filtered through the glomerulus of the nephron. However, the filtrate excludes larger protein molecules that are unable to pass through the glomerular filtration barrier. Therefore, the composition of glomerular filtrate is similar to that of plasma, except that it lacks larger protein molecules. Option A and D are incorrect because the glomerular filtrate does not include many different substances or significantly greater levels of uric acid and creatinine compared to plasma. Option C is also incorrect since the filtrate actually contains a higher concentration of electrolytes than plasma due to the selective filtration process.

The Composition of Glomerular Filtrate Differs from That of Plasma