Pulmonary Function I (Outline) Lyrics

I. Blood Circulation

    C. Flow = Pressure / Resistance

II. The Heart

    A. Functional Gross anatomy
    B. Type I tissue: spreads the signal and contracts
    1. Spreads the signal via gap junctions
    2. Contracts in response to the signal
      a. Myofilaments are arranged into sarcomere
      b. Signal sets into motion calcium release and cross bridge cycling
      c. Implications
        1. Time delay
        2. Increase calcium availability, increased cycling, increased strength
    D. Type I Ventricular Myocardium
      1. Review absolute refractory period in neuron
      2. Absolute refractory period in vent myocardium
      3. Significance: avoid tetany
    Diagram of key events in the cardiac cycle
    E. The pacemaker system and Electrocardiography
    1. Electrical conducting system of the heart: autortyhmic cells
      a. SA node: sets the pace for the heart
      b. AV node
      c. Bundle of HIS
      d. Lt and rt bundle branches
      e. Purkinje fibers
      f. Ventricular muscle
    2. EKG tracing: Lead II
      a. P wave
      b. QRS complex
      c. PR segment
      d. T wave
      e. PR interval
    F. Neurochemical control of heart rate
    1. Normal range
      a. Bradycardia
      b. Tachycardia
    2. Medullary centers: part of ANS which is regulating the rate at which the SA node fires
      a. Cardioinhibitory center
      b. Cardioacceleratory center
    3. Baroreceptor reflexes
      a. General: baroreceptors
      b. Carotid sinus reflex: Decrease pressure, increase heart rate and cardiac output
      increase pressure, decrease heart rate and cardiac output
      c. Bainbridge reflex: increase venous return and increased pressure in the vena cavae, heart rate increases
      d. Effect of the respiratory cycle on heart rate
      Inspiration: decreased thoracic pressure, decrease venous return, decrease CO, decrease pressure at carotid sinus, reflexively HR increases
    Early expiration
    Late expiration

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Genius Annotation

A brief outline of the functioning of the pulmonary system.

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Drawing by Allen Frankhouse

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