Conduction of a nerve impulse proceeds in which direction?

Which letter is pointing to the internal oblique muscle?  

Which number of this diagram represents “threshold” stimulation?  

Solve the problem.The equation r = gives the radius r of a sphere of volume V. If the radius of a sphere is find the exact volume.

What is the name of the connective tissue by #3 arrow?  

What muscle is arrow 73 pointing to?  

What is the name of the muscle that letter “A” is pointing to?  

Which letter is pointing to the platysma?  

What is #1 pointing to in this diagram?  

When a neuron is stimulated, Na+ gates open and allow Na+ to exit the cell.