Glossary P

Glossary P

Photopigment is a chemical that releases energy when struck by light Moreover, Photopigments are chemical substances that absorb light, thereby starting the complex transduction process that transforms physical electromagnetic energy into an electrochemical neural impulse; rods and cones contain different types of Photopigments; different types of Photopigments absorb differing amounts of light and may detect different hues

Photoplethysmograph refers to a device used to measure vaginal lubrication. Photoplethysmograph is an acrylic cylinder that is placed inside the vagina in order to measure physiological sexual arousal in the female. Photoplethysmograph is also called a Photometer.

Photoreceptors transduce light energy into electrochemical energy, the third layer of the Retina contains the Photoreceptors,

Phototherapy refers to a treatment for Seasonal affective disorder (SAD ) that involves exposure to bright, full-spectrum light.

Phototherapy means treatment with light. For exampl

Phrase marker refers to a tree diagram that represents the Phrase structure of a sentence.

Phrase structure refers to the hierarchical organization of sentences into phrases.

Phrase-structure ambiguity refers to a form of ambiguity in which a sentence has multiple meanings that may be revealed by regrouping the sentence constituents.

Phrase-structure grammar refers to the syntactical analysis of the structure of phrases as they are used.