NASM CPT Chpt - 3

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NASM CPT Chpt - 3
2013-03-22 16:09:20

NASM CPT Chpt - 3
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  1. Cardiorespiratory System
    A system of the body composed of the cardiovascular and respiratory system
  2. Cardiovascular System
    A system of the body composed of the heart, blood, and blood vessels
  3. Mediastinum
    The space in the chest between the lungs that contains all the internal organs of the chest except the lungs
  4. Sinoatrial (SA) Node
    A specialized are of cardiac tissue, located in the right atrium of the heart, which initiates the electrical impulses that determine the heart rate: often termed the pacemaker of the heart
  5. Atrioventricular (AV) Node
    A small mass of specialized cardiac muscle fibers, located in the wall of the right atrium of the heart, that receives heartbeat impulses from the SA node and directs them to the walls of the ventricles.
  6. Atrium
    The superior chamber of the heart that receives the blood from the veins and forces it into the ventricles
  7. Ventricles
    The inferior chamber of the heart that receives blood from its corresponding atrium, and in turn, forces blood into the arteries.
  8. Stroke Volume
    The amount of blood pumped out of the heart with each contraction
  9. Cardiac Output (Q)
    Heart Rate x Stroke Volume, the overall performance of the heart
  10. Venuels
    The very small veins that connect capillaries to the larger veins
  11. Respiratory System
    A system of organs (the lungs and respiratory passageways) that collects oxygen from the external environment and transports it to the bloodstream.

    Collects oxygen and transports it to the blood stream
  12. Inspiration
    Process of actively contracting the inspiratory muscles to move the air into the body.

  13. Expiration
    The process of actively of passively relaxing the inspiratory muscles to move air out of the body.

    Active or Passive
  14. Structures of the Respiratory Pump:
    • Bones:
    • 1. Sternum
    • 2. Ribs
    • 3. Vertebra 

    • Muscles (Inspiration):
    • 1. Diaphragm
    • 2. External Intercostals
    • 3. Scalenes
    • 4. Sternocleidmastoid 
    • 5. Pectoralis Minor

    • Muscles (Expiration):
    • 1. Internal Intercostals
    • 2. Abdominals
  15. Diffusion
    The process of getting oxygen from the environment to the tissues of the body
  16. Maximal Oxygen Consumption ()
    The highest rate of oxygen transport and utilization achieved at maximal exertion.

    Achieved at maximal physical exertion
  17. Aerobic
    Requires oxygen
  18. Anearobic
    Does not require oxygen
  19. Fick Equation
    Oxygen consumption is a product of cardiac output and the aterial-venous difference.
  20. Heart
    Divided into four chambers

    • 1. Two Atria - gather blood
    • 2. Two Ventricles - pump blood out
  21. Heart rate and stroke volume make up the _____     ______
    Overall Performance
  22. Cardiac output = ?
    Beats/Minute + How much blood is being pumped