In the sliding filament model, what do the myosin heads attach to?

Match the muscle with the nerve. Answers can be used more than once. 

What three muscles make up the erector spinae?

Match the number with the correct part of the skull.  

Sensory (____________________) neurons will transmit sensory impulses to your brain and spinal cord, and motor (___________________) neurons will transmit motor impulses to your muscles.

What is the nerve could be damaged if crutches are should improperly at the armpit?

With the help of sunlight, the body can synthesize vitamin D from a precursor made from ________.

Which part of the nervous system would be fully engaged if you were running from a wild animal?

What is the role of bursae?

What does the appendicular skeleton contain?