When the inside of the cell membrane of a neuron becomes less negative or even positive due to an influx of sodium ions, is termed as: 

Which does not decrease in width when the sarcomere shortens?

The origin of the sternocleidomastoid muscle is from the sternum and clavicle, while the insertion is on the _________.

An extensor of the elbow joint is:

Biceps brachii, flexes the elbow joint, while triceps brachii extends the elbow joint, these muscles are _________ to each other.

Bundles of axon in the central nervous system are called ________.

Identify the H zone   

Which of the following muscles is a muscle of the quadriceps femoris group?  

Most commonly sensory neurons are:

As you increase the frequency of stimulation of skeletal muscle the tension increases, causing wave summation and tetany. This is due to build up of__________ within the muscle cells.