The Number of Grams Q of a Certain Radioactive Substance

question 16

Multiple Choice

The number of grams Q of a certain radioactive substance present after t seconds is given by the equation . How many grams remain after 14 seconds? Please round the answers to the nearest whole.

• A) Q = 1,309 grams
• B) Q = 1,283 grams
• C) Q = 1,490 grams
• D) Q = 1,232 grams
• E) Q = 1,233 grams

---

Definitions:

Distal Convoluted

Pertains to the part of the nephron in the kidney farther from the renal corpuscle, involved in the reabsorption of water, sodium, and chloride.

Loop Of Henle

The portion of the renal tubule that curves back toward the renal corpuscle and twists again to become the distal convoluted tubule.

Renal Corpuscle

The initial filtering component of the nephron in the kidney, where blood plasma is filtered through the capillary walls of the glomerulus into the Bowman's capsule.

Renal Artery

A blood vessel that supplies the kidneys with oxygen-rich blood.