Refer to the image above. 1. Name the structure at the end of “A.” 2. True or False, this structure “A” is not keratinized.

Unmyelinated fibers use ________ conduction, which propagates the action potential down the axon as voltage-gated sodium channels open up next to each other.

An action potential causes calcium ions to diffuse from the __________ into the __________.

 When voltage-gated sodium channels are open, sodium flows _____________ the neuron, making the inside of the cell more _______________.

The least movable joints are _____________ joints, which occur when two bones fuse together.

Nerves are __________ of the nervous system.

In an ECG pattern, the T wave is caused by

Interleukin-1 secretion causes

Which of the following is most life threatening?

T lymphocytes are responsible for