Often after an acute injury of the knee the quadriceps muscle will not contract, which is called âquad inhibition.â. Inability to straighten the leg. Athletes with acute patellar injuries may find that they cannot flex the knee joint fully or straighten the leg. This may be exacerbated by swelling of the knee.
The alkali metals are a group (column) in the periodic table consisting of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).
Alkali salts are soluble hydroxides of alkali metals and alkaline earth metals, of which common examples are: 1  Sodium hydroxide-often called caustic soda. 2  Potassium hydroxide-commonly called caustic potash. 3  Lye-generic term for either of the previous two or even for a mixture.n chemistry, an alkali (/ËaelkÉlaÉª/ ; ËÃ¦lkÉlaÉª From: arabic-al qaly, Ø§ÙÙÙÙ, âØ§ÙÙØ§ÙÙ ashes of theâ) saltwort is a, basic ionic salt of an alkali metal or alkaline earth metal chemical. Element an alkali also can be defined as a base that dissolves in. water