Nervous System
The state when a cell membrane becomes more negative or less positive
Depolarized
The key ion needed in muscle contractions
Ca2+
The largest artery
Aorta
The muscle that is responsible for ventilation
Diaphragm
The two types of electric signals passed through an neuron
Graded potential and action potential
The two components of a sarcomere
Myosin and actin
The two phases of the cardiac cycle.
Diastole and systole
The medical term for elevated concentrations of CO2
Hypercapnia
The enzyme that breaks down acetylcholine
Acetylcholinesterase
The three types of muscle fibers.
Slow oxidative, fast glycolytic, fast oxidative glycolytic or Type 1, Type 2A, Type 2B.
The location from which depolarization or the electric signals begins in the heart
The sinoatrial (SA) node.
The locations of the greatest resistance and the greatest air flow in the respiratory system
Trachea and bronchi
The major parasympathetic tract, also known as the tenth cranial nerve.
Vagus nerve
The fastest way a muscle cell can generate ATP to contract muscle
Phosphocreatine
The four valves within the heart
Tricuspid, bicuspid, aortic, and pulmonary valve.
The condition that causes difficulty breathing due to increasing the diffusion distance in alveoli
Pulmonary edema
The cells that form the myelin sheath around axons in the central nervous system.
Oligodendrocytes
The two regulatory proteins of actin
Troponin and tropomyosin
The QRS complex seen in an ECG represents
Ventricular depolarization
The enzyme responsible for the rapid production of HCO3-
Carbonic anhydrase