If an Iron-59 Sample Has an Initial Activity of 160

question 143

Multiple Choice

If an iron-59 sample has an initial activity of 160 dpm,how much time is required for the activity to drop to 20 dpm? (t1/2 = 45 days)

• A)45 days
• B)90 days
• C)135 days
• D)180 days
• E)210 days

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Definitions:

THC

Tetrahydrocannabinol, the principal psychoactive constituent of cannabis that affects the brain by binding to cannabinoid receptors.

Anandamide

An endocannabinoid that acts as a neurotransmitter, playing a role in pain, mood, and appetite regulation within the body.

Habituation

Learned behavior in which the response to a stimulus weakens with repeated presentations.

Calcium Ion Influx

A cellular process involving the movement of calcium ions (Ca2+) into a cell, leading to various physiological responses.