Neurons are responsible for sending and receiving signals referred to as action potentials while neuroglial cells serve a variety of supportive functions.

Electrical gradients exist because sodium and potassium ions are separated on either side of the plasma membrane.

Which type of fiber has the largest diameter?

Decreased oxygen availability leads to muscular fatigue.

Conduction speed of a nerve impulse is influenced by the diameter of the axon and the presence or absence of a myelin sheath.

The narrow gap of space between the axon terminal and the muscle fiber into which acetylcholine is released is called:

Myofilaments shorten to produce muscle contractions according to the sliding filament mechanism.

Where are acetylcholine molecules located in a nerve cell?

What ion is required for vesicles in a neuron to release their neurotransmitter?

A 62-year-old man with a history of congestive heart failure presents with severe respiratory distress and an oxygen saturation of 82%. When you auscultate his lungs, you hear widespread rales. He is conscious and alert, is able to follow simple commands, and can only speak in two- to three-word sentences at a time. You should: