BIOL 1002 : Test3
Document Summary
Blood pressure: caused by constriction of small arteries. Cellular respiration converts energy in nutrients to atp requires ready amounts of oxygen. Nearly all (about 90%) of the o2 carried by the blood is bound to hemoglobin. Co2 is transported in the blood in three ways: as bicarbonate ions (70%) when co2 combines with water, bound to hemoglobin (20%, dissolved in plasma as co2 (10%) Breathing has two stages inhalation, exhalation: diaphragm lower boundary of the chest cavity, adjusts breathing rate for body"s needs, domes upward when relaxed, force air in and out of lungs. Most energy is provided by carbohydrates and fats: energy is released and captured in atp. Average human burns 70 calories per hour at rest, 20 per hour during exercise. Digestion process that physically and chemically breaks down food. 4 different kinds of teeth incisors biting: canines tearing, premolars grinding, molars crushing and chewing.
