The Activity of a Radioactive Sample Is Defined as the Number

question 65

Multiple Choice

The activity of a radioactive sample is defined as the number of decays per second.For a sample with N particles and a decay constant $\lambda$ ,the activity is

• A)proportional to \(\lambda\) and inversely proportional to N.
• B)proportional to \(\lambda\) but independent of N.
• C)directly proportional to both \(\lambda\) and N.
• D)independent of \(\lambda\) but proportional to N.
• E)inversely proportional to both \(\lambda\) and N.

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Definitions:

Glomerulus

A small, dense network of capillaries encased in the Bowman's capsule within the kidney, where blood filtration begins in urine formation.

Urine Culture

A laboratory test to detect and identify bacteria or fungi that may be causing a urinary tract infection.

Creatinine

A waste product generated from muscle metabolism, which is filtered out of the blood by the kidneys and excreted in urine; its levels are used to assess kidney function.

BUN

Blood Urea Nitrogen, a test measuring the amount of nitrogen in the blood that comes from urea, a waste product of protein metabolism.