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10 Cards in this Set

  • Front
  • Back
Acceleration
The rate at which speed changes (change in velocity per unit time).
Acetylcholine
A neurotransmitter used to stimulate the activation of a cell.
Acetylcholine receptors
Receptors on cell memberanes that bind acetylcholine and begin the process of activating the cell.
Action potential
The change in ion concentration and electrical charge along the cell membrane that occurs when a cell is activated.
Active sites
Specific locations on actin myofilaments to which the myosin crossbridge heads will bind during a muscle action.
Adaptation
The long-term change that occurs to a body system as a result of repeated exposure to a stimulus.
Adenosine diphosphate (ADP)
A by-product of the breakdown of ATP when a phosphate is removed and energy is released.
Adenosine triphosphate (ATP)
A high-energy phosphate molecule required to provide energy for cellular function; produced both aerobically and anaerobically and stored in the body
Aerobic
Occurring in the presence of oxygen.
Aerobic endurance
The ability of the lungs and hearts to take in and transport adequate amounts of oxygen to the working muscles, allowing activities that involve large muscle masses to be performed over long periods of time.