Examlex
In Alzheimer's disease,affected nerve cells in the brain are filled with abnormal collections of twisted protein threads called ________ and deposits of apparently toxic protein fragments called amyloid-beta plaques.
Molecule
The smallest unit of a chemical compound that retains its chemical properties, consisting of two or more atoms bonded together.
Silica
A chemical compound of silicon and oxygen, often found in quartz and used in glass making and electronics.
Halite
Halite is a naturally occurring mineral known as rock salt, consisting mainly of sodium chloride (NaCl), and is often mined for use in cooking and as a road deicer.
Water
A transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's streams, lakes, and oceans, and the fluids of most living organisms.
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