Which is a definition of hypertrophy? a. an increase in muscle fiber number b. a decrease in muscle fiber number c. a decrease in muscle fiber size my pick d. an increase in muscle fiber size?

I'm pretty sure the answer is D.) An increase in muscle fiber size.

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.