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Ralph is taking scuba diving classes and is warned not to hold his breath when ascending from depth but to continuously release air from his mouth. What is the basis of this instruction and what is the risk if it is ignored?
Agitation
A state of anxiety or nervous excitement, often manifesting as restless or tumultuous behavior.
Anxiety
A feeling of worry, nervousness, or unease, typically about an imminent event or something with an uncertain outcome.
Acetylcholine
A neurotransmitter in the brain and peripheral nervous system important for muscle activation, and involved in attention, learning, and memory.
Antagonist
In pharmacology, a substance that acts against and blocks an action within the body, or in literature, a character who opposes the protagonist.
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