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Bio 245 Exam 3 Respiratory System
Bio 245 Exam 3 Respiratory System
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Bio 245 Exam 3 Respiratory SystemAlveoli - ANS-air sacs in the lungs, participate in gas exchange;
apnuestic center - ANS-Stimulates inspiratory center to prolong inhalation
Bohr effect - ANS-Increasing acidity shifts the O2-Hb saturation curve to the right,
enhancing unloading of O2
Boyles Law - ANS-P1V1 = P2V2; volume and pressure are inversely related; V = 1/P
bronchial arteries - ANS-branch from the aorta and deliver oxygenated blood to the
lungs primarily perfusing the muscular walls of the bronchi and bronchioles
Carina - ANS-Point at which the trachea bifurcates (divides) into the left and right
mainstem bronchi; sensitive for triggering cough reflex
Conducting zone - ANS-brings air to the site of external respiration; nose, pharynx,
larynx, trachea, bronchi, bronchioles, terminal bronchioles
Daltons Law - ANS-at constant volume and temperature, the total pressure exerted by a
mixture of gases is equal to the sum of the partial pressures of the component gases;
Ptotal = P1 + P2 + P3...
decompression sickness (the bends) - ANS-A condition seen in divers in which gas,
especially nitrogen, forms bubbles in blood vessels, obstructing them.
Epiglottis - ANS-A flap of elastic cartilage covered with a mucous membrane; guards
entrance of glottis during swallowing
expiratory center - ANS-does not function in quiet breathing; impulses from center
stimulate the internal intercostal and abdominal muscles to contract
Expiratory Reserve Volume (ERV) - ANS-Volume expired during a forced exhalation
(1200 ml)
external respiration - ANS-gas exchange between alveoli and blood
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