PSA Velocity Is

question 16

Multiple Choice

PSA velocity is

• A)the amount that the velocity of a man's urine is slowed due to the pressure of the prostate tumor on the bladder
• B)the change in the PSA levels from one year's measurement to the next
• C)the amount of time it takes for PSA to double
• D)the rate that PSA comes to equilibrium in a centrifuge tube

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Definitions:

Pineal Gland

A small endocrine gland in the brain involved in the regulation of sleep patterns through the secretion of melatonin.

Biological Clocks

Internal mechanisms in organisms that control the timing of biological functions and behaviors, helping to adapt to the day-night cycle.

Hormone

Chemical substances produced in the body that regulate and control the activity of certain cells or organs.

Circadian Rhythm

The internal body clock that regulates the 24-hour cycle of biological processes, including sleep-wake patterns.