Which statement is correct about sliding filament model?

Which statement is correct about spinal nerves?

A gymnast when practicing gymnastics, needs ___________________ for balancing her somersaults.

All of the following are parts of the appendicular skeleton EXCEPT:

Vital centers for the control of heart rate, respiration, and blood pressure are in the ________.

Sara et Noah ______ la table quand Daniel a téléphoné. (mettre)

Alternating contractions and relaxations of smooth muscle layers that mix and squeeze substances through the lumen of hollow organs.

Se marier (on)

Refer to the picture to identify the letter pointing to perimysium: Screen Shot 2022-06-21 at 1.23.55 PM.png 

Cells found in the choroid plexuses that secrete cerebrospinal fluid are