The combined gradient that affects ions like potassium and their potential to diffuse across the cell membrane
is described as
a. passive
b. extracellular
c. electrochemical
d. hypertonic

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a. an ionic bond is formed between the oxygen and carbon atoms. b. four valence electrons are shared. c. two valence electrons are shared. d. valence electrons are shared between oxygen atoms.