________ 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

Nucleotides used to form DNA use ________ as their five-carbon sugar. Type the best answer that completes this sentence into the text box below

_______ is the carbohydrate polymer used by animals (like humans) to store carbohydrates in the liver and skeletal muscle for later use. Type the best answer that completes this sentence into the text box below

Skeletal muscles are innervated by:

They transport only sensory fibers: