BISC104 Lecture Notes - Lecture 1: Rib Cage, Lung Cancer, Cell Membrane
13 Jan 2017
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Chemicals: > 4500 identified, at least 50 are identified as cancer-causing (carcinogens) Air pressure decreases and air comes in. Air pressure increases and air moves out. As the co2 level in blood increases, breathing increases. Lungs: bronchi= 2 branches, bronchioles= smaller branches, alveoli= where gas exchange occurs; air sacs; covered in network of capillaries. Clicker question: gases like o2 and co2 pass across a plasma membrane by simple diffusion. Simple diffusion between the alveoli and the capillaries. Q: after picking up o2 in the lungs, the blood goes to the heart. Emphysema: permanent damage, scar tissue builds up. Three main components: circulating fluid (blood, pump (heart, vascular system (blood vessels and capillaries) Moving liquid tissue: cells suspended in an aqueous solution (plasma) Composition: fluid (plasma, cells (red, white, platelets) Produced by stem cells in the bone marrow. Valves: av valves atrioventricular valves, semilunar valves take blood away from heart.
