Pre-test: Chapter 2 - Basic Chemistry: Matter and Energy
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10 Terms
Matter
Anything that occupies space and has mass
Liquid
Blood plasma and interstitial fluid are examples of which state of matter within the human body?
Chemical Change
Digestion of food in the stomach
Chemical energy
What form of energy is stored in the chemical bonds of substances like ATP and glucose?
Ions
Electrical currents in the human body are primarily generated by the movement of which particles across cell membranes?
Carbon, Hydrogen, Oxygen, Nitrogen
Which four elements make up approximately 96% of the human body's total weight?
Proton
Which subatomic particle carries a positive charge and has an atomic mass of approximately 1 amu?
Cation
An atom that loses one or more electrons becomes a positively charged particle called a(n):
Covalent Bond
What type of chemical bond is formed when two atoms share valence electrons to achieve stability?
Thermal energy (heat)
During energy conversions in biological systems, a portion of the energy is always dissipated into the environment as unusable: