During a Phase Change, Which Is True

question 20

Multiple Choice

During a phase change, which is true?

• A)Intermolecular hydrogen bonds can be broken
• B)Ionic bonds are broken in a salt or other ionic compound
• C)Non-polar covalent bonds can become polar covalent bonds
• D)Polar covalent bonds are disrupted

---

Definitions:

Posttraumatic Stress Disorder (PTSD)

A mental health condition triggered by experiencing or witnessing a terrifying event, characterized by flashbacks, nightmares, severe anxiety, and uncontrollable thoughts about the event.

Acetylcholine

Functioning as a key neurotransmitter, acetylcholine plays critical roles in the activation of muscle action, the workings of the parasympathetic nervous system, and cognitive function.

Second-messenger System

A mechanism by which neurotransmitters and hormones signal a cell to produce an internal signal in response to a message received at a cell receptor.

Ion Flow

The movement of ions across a membrane, critical for processes such as nerve signal transmission and muscle contraction.