Article Sections. Urinary tract infections are the most common bacterial infections in women. Most urinary tract infections are acute uncomplicated cystitis. Identifiers of acute uncomplicated cystitis are frequency and dysuria in an immunocompetent woman of childbearing age who has no comorbidities or urologic abnormalities.
In this lesson you learned about two types of bonds: nonpolar covalent and polar covalent. Nonpolar covalent bonds are a type of chemical bond where two atoms share a pair of electrons with each other. Polar covalent bonding is a type of chemical bond where a pair of electrons is unequally shared between two atoms.
Something that is nonpolar is a chemical that DOES have an even sharing of electrons, such as methane (CH4). Since all electrons are shared evenly there is no dipole moment and thus no charge on the molecule. In the context of biology, polar molecules attract polar molecules and non-polar molecules attract non-polar molecules.