___________ Occurs Only at the Very High Energies Used in Radiation

question 19

Multiple Choice

___________ occurs only at the very high energies used in radiation therapy and in nuclear medicine P.E.T. imaging.

• A) Coherent scatter
• B) Compton scatter
• C) Photoelectric absorption
• D) Pair production

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Definitions:

Ascending Fibres

Nerve paths that carry sensory information from the body up to the brain.

Reticular Activating System

A network of neurons located in the brainstem that plays a crucial role in controlling arousal and alertness levels.

REM Sleep

A stage of sleep characterized by rapid eye movements, vivid dreaming, and increased brain activity.

Pons

A part of the brainstem that links the medulla oblongata and the thalamus, playing a crucial role in controlling breathing, communication between different parts of the brain, and sensations such as hearing and taste.