Question

the process that moves substances from the blood into the kidney tubules to become part of the urine is ______ .
a glomerular filtration
b tubular reabsorption
c tubular secretion

Explanation:

To solve this, we analyze each option:

• Option A (glomerular filtration): Filters blood to form filtrate in Bowman's capsule, not directly moving substances from blood to tubules to be urine (it's the initial filtration).
• Option B (tubular reabsorption): Reabsorbs substances from tubules back into blood, opposite of what's needed.
• Option C (tubular secretion): Actively transports substances from blood into renal tubules to be excreted in urine, matching the description.

Answer:

C. tubular secretion