1 / 20

Respiration

Respiration. Metabolism. Respiration. What is unique about blood in pulmonary arteries compared with blood in other arteries?. Blood in pulmonary arteries is always blue; it is red in all other arteries. It is moving away from the heart. It is moving toward the heart.

vern
Download Presentation

Respiration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Respiration Metabolism

  2. Respiration

  3. What is unique about blood in pulmonary arteries compared with blood in other arteries? • Blood in pulmonary arteries is always blue; it is red in all other arteries. • It is moving away from the heart. • It is moving toward the heart. • It is the same as blood in other arteries. • It is loaded with carbon dioxide.

  4. The Pulmonary System Branch of pulmonary vein (oxygen-rich blood) Branch of pulmonary artery (oxygen-poor blood) A reading? Terminal bronchiole Nasal cavity Pharynx Larynx Alveoli (Esophagus) Left lung Trachea Right lung Bronchus Bronchiole Diaphragm Heart SEM Colorized SEM 50 µm 50 µm

  5. A reading . . .

  6. In negative pressure breathing, inhalation results from • forcing air from the throat down into the lungs. • contracting the diaphragm. • relaxing the muscles of the rib cage. • using muscles of the lungs to expand the alveoli. • contracting the abdominal muscles.

  7. When you hold your breath, which of the following blood gas changes first leads to the urge to breathe? • rising O2 • falling O2 • rising CO2 • falling CO2 • rising CO2 and falling O2

  8. Lungs expand and contract in response to changes in pressure inside the chest cavity. EXHALATION INHALATION Diaphragm

  9. Cerebrospinal fluid Pons pH [CO2] Breathing control centers Medulla oblongata Carotid arteries Aorta Diaphragm Rib muscles

  10. Smallest bronchiole Alveoli Air Oxygenated blood out Deoxygenated blood in Alveolus

  11. Fick’s Law at the lungs (the alveolar ventilatory surface) Air Oxygen Aqueous film Epithelium of alveolus 0.2 µm Wall of capillary Blood

  12. Capillaries are small and extremely thin walled.

  13. Gas Exchange

  14. Hemoglobin The Body’s Oxygen Shuttle (and more)

  15. At the tissue (the capillary bed by active muscle) CO2 from tissue HCO3– Transported in plasma Cl– CO2 + H2O HCO3– + H+ Carbonic anhydrase Binds to hemoglobin How many hemaglobins? Red blood cell Plasma

  16. When you hold your breath, which of the following blood gas changes lead to the urge to breathe? • rising O2 • falling O2 • rising CO2 • falling CO2 • rising CO2 and falling O2

  17. Compared to the interstitial fluid that bathes active muscle cells, blood in arteries just arriving at muscle cells has a? • higher concentration of O2 • higher concentration of CO2 • greater bicarbonate concentration. • lower pH • lower osmotic pressure

  18. Which reaction accurately represents what happens inside red blood cells traveling through alveolar capillaries? (Hb = hemaglobin) • Hb + 4 O2 -> Hb(O2)4 • Hb(O2)4 -> Hb + 4O2 • CO2 + H2O -> H2CO3 • H2CO3 -> H+ + HCO3- • Hb + 4 CO2 -> Hb(CO2)4

More Related