Achange in smooth muscle cell tension in the absence of a change in electrical potential of the cells is described as a a. pacemaker potential. b. slow wave potential. c. pharmacomechanical coupling. d. electromechanical coupling.

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils