11) The sodium-potassium exchange pumpa. is an example of facilitated diffusionb. does not require the input of cellular energy in the form of ATPc. moves the sodium and potassium ions along their concentration gradientsd. Uses ATP and an antiport carrier protein located in the cell membrane

______ is a lipid that is the precursor or primary source molecule for making steroid hormones. Type the best answer that completes this sentence in the text box below

When looking at a periodic table, the _________ tells you the number of protons in that element. Type the best answer into the text box below.

When an element loses an electron, it is technically and most specifically called a(n) _________. Type the best answer that completes this sentence into the text box below

________ ion is the primary buffer in human blood, which makes it critical for regulating blood pH. Type the best answer that completes this sentence into the text box below

This nucleotide-derived molecule is the primary energy source for most cellular work. Type the best answer into the blank below:

This nucleotide-derived molecule serves as an important intracellular messenger. Type the best answer into the blank below:

When the number of neutrons is altered in an element, that creates a(n) _______ of that element. Type the best answer that completes this sentence into the text box below

When an element gains an electron, it is technically and most specifically called a(n) _________. Type the best answer that completes this sentence into the text box below

________ is a functional category of proteins that includes antibodies that help to fight infection. Type the best answer that completes this sentence into the text box below