Chordate Pharyngeal Slits Appear to Have Functioned First as ________

question 62

Multiple Choice

Chordate pharyngeal slits appear to have functioned first as ________.

• A) the digestive system's opening
• B) suspension-feeding devices
• C) components of the jaw
• D) sites of respiration

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Definitions:

Neurotransmitter

Chemical substances in the brain that transmit signals from one neuron to another.

Serotonin

A neurotransmitter that plays a key role in mood regulation, affecting emotions, and the overall sense of well-being.

Obsessive-Compulsive Disorder (OCD)

A mental disorder characterized by unwanted and intrusive thoughts (obsessions) and repetitive behaviors or mental acts (compulsions) that an individual feels driven to perform.

Checking Routines

Behaviors commonly associated with OCD, involving repeated checking to alleviate anxiety related to fears of harm or mistakes.