The neurotransmitter used by the nervous system to activate skeletal muscle cells is acetylcholine.

Which of the following types of bone has lots of holes with a meshwork of interconnecting bone?

Degenerative joint disease is also known as ____.

Which of the following bones forms most of the roof of the cranium?

Which of the following can actually shorten during a muscle contraction:

A bone that is broken but does not pierce the skin is a(an)

Which of the following is NOT a feature of compact bone?

The shaft of a long bone is the

The ion necessary for cross–bridging is

What is the role of ATP in the sliding filament theory?