Which of the following does NOT occur as a sarcomere shortens during muscle contraction?

A) The thin and thick myofilaments shorten in length.
B) The I bands shorten.
C) The Z lines (discs) move closer together.
D) The H zone shortens.
E) All of these occur as a sarcomere shortens.

The enzyme produced by the salivary glands is ________; it breaks down ________.

A) amylase; starch
B) lipase; lipids
C) pepsin; proteins
D) amylase; lipids
E) pepsin; starch