BIOL 1107 UCONN ECE Biology 1107 Final Exam 2024

BIOL 1107 UCONN ECE Biology 1107 Final Exam 2024 b. Partial pressure is the pressure of each gas in a mixture determined by the proportion c. Oxygen diffuses down the gradient i. When air is first inhaled, it is dry and high in O2 concentration 1. Not a lot of CO 2, d. Lungs contain many capillaries and alveoli, pulmonary veins move blood from the lungs to the heart i. Oxygen is higher than Co2 ii. Pumps blood to heart then body tissues iii. In body tissues, oxygen is delivered and co2 ios picked up e. In body tissues, capillaries form a capillary network i. At the start of the net, blood is oxygen rich. By the other side it has lost oxygen and gained co2 ii. Co2 diffuses from inside cell to the capillary from cellular respiration f. Oxygen poor blood is sent back to the heart, where it is pumped to the lungs by pulmonary arteries i. The process begins again, the blood exits the pulmonary arteries to go to alveoli and is exhaled through the lungs, new oxygen comes back from dry inhaled air g. Hemoglobin is used and it is a protein with a quaternary structure with 4 heme groups that can combine reversibly with oxygen i. Enables blood to carry gas and hop off at body tissues delivering oxygen to cells of the body ii. Found in red blood cells enabling blood to carry gas iii. Oxygen combines with hemoglobin and decreases the partial pressure of oxygen in plasma allowing more oxygen to enter the blood from the alveoli iv. Hemoglobin allows blood to carry more oxygen v. When hemoglobin reaches the body tissues it is not saturated bc oxygen hops off hemoglobin vi. Hemoglobin ability to hold onto oxygen varies with partial pressure vii. Boar effect at lower pH hemoglobin will more readily release more oxygen 1. Hemoglobin conformation changes in lower pH and this shape change disease hemoglobin affinity for oxygen 44. Be able to explain where blood pressure comes from, why it is physiologically important, and how it is regulated. a. Cardiac output: how fast and hard the heart beats i. Happens in response to stretch (baro) receptors in the muscle, aorta, and carotid arteries. These receptors detect current bp and project information to the medulla to raise or lower bp