An Atom Is Best Described as

question 60

Multiple Choice

An atom is best described as

• A) the smallest unit of an element.
• B) defined by its number of electrons.
• C) defined by its atomic mass.
• D) always containing an equal number of protons and neutrons.
• E) having a nucleus containing protons and electrons.

---

Definitions:

Brain Areas

These are specific regions within the brain each responsible for different functions such as processing sensory information, controlling motor skills, or facilitating cognitive processes.

Overarousal

A condition of excessive psychological and physiological tension, often leading to anxiety, restlessness, or inability to sleep.

Neurotransmitter

Chemical messengers that transmit signals across the synaptic gap between neurons, influencing various bodily functions.

Alarm Centers

Brain regions responsible for processing threats and initiating the body's stress response, often involving the amygdala and hypothalamus.