Category: P

Afterimage in which the colors and light intensity are unchanged.  

Sticking of the pericardium to the myocardium, e.g., after heart surgery. If extensive, adhesions may lead to restriction of the normal contraction of the heart.  

The ability to maintain balance and remain upright during changes in position and challenges to stability.  

The goal-directed use of time, energy, or attention that involves the active participation of the doer. Purposeful activity by humans often involves a social environment (others), a physical environment (objects, tools, and materials), and a process, which often culminates in a product.  

Acne that may occur in those who work with petroleum and oils.  

A colorless unstable liquid compound. It is the highest oxygen-containing acid of chlorine.  

An artificial nucleic acid analog in which natural nucleotide bases are linked to a peptide-like backbone instead of the sugar-phosphate backbone found in DNA and RNA. It has numerous uses in gene regulation, splicing, and therapy; in hybridization; and as a molecular diagnostic assay.  

Congenital absence of ganglion cells in the distal large bowel, resulting in failure of the colon to relax.  

Contraction of the ciliary muscle to adjust for near vision.  

The taking up of amino acids singly, or linked as dipeptides or tripeptides by the brush border of the small intestine.