occurs because the nervous systems send messages to the muscles in the muscular system. (I need someone to fill in this blank with the best possible answer, I’ll reward points + brainalist)

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer

Which body region are part of the cephalic region?