Study Guide for Week 11.docx - Study Guide for Week...

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Study Guide for Week 11 (Respiratory, Circulatory, and Excretory Systems) Respiratory System Anatomy – recognize and give functions of these. Larynx – this is the Adam’s apple or voice box. Trachea – What is this made of? How does it differ from the esophagus? Lungs – Are the two lungs identical? Bronchi Bronchioles Alveoli Capillaries Air in inhaled through the __ Nasal Activity____________ and is warmed to body temp and humidified. Mucus and _ cilia_________ that line the respiratory tract remove debris. Air travels through the ____ Pharynx____________, then the Larynx (vocal cords), then ___ trachea_____________, bronchi, bronchioles, and finally the ___ Alveoli__________________. Gas exchange occurs between the alveoli and the capillaries in the lungs. The air inside the alveoli is high in __ O2__________ and it diffuses into the blood. The blood is high in ____CO2___________ and it diffuses into the alveoli (lungs). The surface area of all the alveoli is very large (about half a tennis court) because the gas exchange relies on diffusion. ______Surfactants____________ are important because they prevent the tissue inside the lungs from sticking together. Breathing is caused when a muscular sheet below the lungs, the ____Diaphragm____________, and the intercostal muscles contract. This causes negative pressure (the area expands and air rushes into the lungs). When these muscles relax, ____ Exhalation_________ occurs. Once oxygen has diffused into the blood 98.5% of it is carried by a protein called ___ Hemoglobin__________. This protein is in red blood cells (erythrocytes). The heme part of the protein contains iron. What causes the color difference between arterial blood and venus blood? Carbon dioxide (CO 2 )is transported in three ways. 85% is carried by the bicarbonate buffer system. You do not need to understand the chemistry behind this buffering system, but know that CO 2 reacts with water to form a bicarbonate ion that can reverse back into CO 2 in the lungs to be exhaled.
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  • Spring '16
  • Christina Snaples
  • left ventricle, inferior vena cava, Renal cortex

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