Relaxation indicates that the body possesses a high level of acetylcholine. This is know as the "rest and digest" stage. Epinephrine and norepinephrine perform the opposite task of acetylcholine and are "fight or flight" neurotransmitters. Last, dopamine is a pleasure hormone

Beta brainwaves function at 13-30 hertz and they are associated with being alert, active, or concentrated. On the other hand, alpha brainwaves function at 8-13 hertz and are associated with daydreaming and more relaxed states of mind. Alpha waves are responsible for the calming feeling that one experiences when they close their eyes and take a few deep breaths.

Insomnia is best defined as "the inability to fall asleep or stay asleep." It is commonly characterized by symptoms associated with having trouble falling asleep or staying asleep

During REM sleep there is an increase in the amount of acetylcholine released. During all stages of NREM sleep there is minimal acetylcholine release.

When a person is falling asleep they experience twitching, hypnic jerks and hypnagogic hallucinations. This all occurs in the first stage of sleep, NREM 1.An easy way to remember this is to think if someone wakes you up shortly after you fall asleep. You may recall a vivid hallucination but you were not yet in REM sleep, the stage of dreams.

During stage NREM 3 there are delta waves present on EEG. These are the slowest of all sleep brain waves and signifies the deepest, most restful stage of sleep.

“Prosopagnosia” is the inability to recognize familiar faces. The other choices are incorrect. “Agnosia” is the inability to recognize familiar objects. “Akathisia” is a feeling of restlessness and agitation that may be caused by antipsychotic medications. “Anomia” is difficulty with naming objects. “Apraxia” is the inability to perform skilled movements. 

All of the responses are true of PKU except that it is caused by a third 21st chromosome. Down Syndrome is caused by an extra copy of the 21st chromosome. Symptoms typically include delayed development, intellectual disability, and specific facial features. Unfortunately Down Syndrome cannot be managed by a change in diet. The most helpful interventions for Down Syndrome include parents, therapists, and teachers working together to support the child early on. 

Declarative and non-declarative, or implicit and explicit memory, are the two different categories of long term memory; they both are responsible for different types of memory encoding/retrieval, and their neural actions and reactions take place in different parts of the brain.

A retrieval error—in this case, a feature cue error—in memory is any error, which results from a failure to correctly recall information that was successfully stored in long-term memory. If a cue fails to produce a strong enough association with a word or an interfering event prevents complete remembering of a prior event, then a retrieval error is said to have occurred.