Bio100 Exam Newest Exam Questions And Correct Detailed Answers (Verified Answers) |Already Graded A+||Brand New!!

Bio100 EXAM NEWEST EXAM QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND NEW!! Which type of blood cell is required for blood clotting? ____________ What is the name of the active form of the protein in our blood that causes a clot to form? ____________ - Answers - platelets fibrin What type of cell can squeeze out of the circulatory system to hunt for bad guys in infected tissues? _____________, which are a type of ________________. - Answers - macrophages white blood cell Which is the most prevalent gas in our atmosphere? _________ What is its approximate % in the atmosphere? _________ - Answers - Nitrogen 79% What is the direction that air flows from the nose/mouth into your bloodstream? - Answers - pharynx -- larynx -- trachea -- bronchi -- bronchioles -- alveoli In humans, lungs are caused to inflate during shallow breathing when the diaphragm muscle ___________. When this occurs, the volume of the chest cavity increases, which causes the pressure of the air inside of the chest cavity to ___________. - Answers - contracts and air is sucked in by negative pressure; decrease When you hold your breath, which of the following first causes you to feel like you need to breathe? ______________ Where is the breathing center located in your brain? _______________ - Answers - rising CO2 levels in the blood; medulla When the pH of your blood goes down too low, that means there is ________ H+ in your blood, and you will respond by ___________. The buffer in our blood that works with our respiratory system to keep our pH constant is __________. - Answers - too much; breathing more rapidly; bicarbonate Which of the following chemicals is a bronchoconstrictor? ____________ Which of the following chemicals is a bronchodilator? _____________ Which of the following chemicals will reduce inflammation in the bronchial airways? _____________ - Answers - ACH epinephrine steroids The maximum amount of air that you can exhale after fully inhaling is called your ________________. This volume _____________ as we age. The amount of air that remains in the lungs after a full exhalation is called the residual volume. This volume ______________ as we age. - Answers - vital capacity decreases increases What hormone can be injected into a pregnant mother to stimulate the production of surfactant? - Answers - cortisol Does the mother's blood flow through the umbilical cord into the fetus? _______ Does fetal hemoglobin attract oxygen with a higher or lower affinity than adult hemoglobin? _______ What causes the baby to breath upon birth? ___________ - Answers - no higher increase in CO2 in fetal blood What type of molecule is surfactant? What does it do to surface tension? - Answers - lipid reduces surface tension The amount of air that you cannot exhale from your lungs is called the - Answers - residual volume How is the respiratory system affected in someone with emphysema? - Answers - the residual volume increases and the total lung capacity increases Roles of the kidneys - Answers - regulate ph levels of blood regulate salt and water in blood act like a filter to remove wastes from the blood, and keep nutrients in the blood What is the functional filtering unit of the kidney (there are thousands of these in each kidney)? - Answers - nephron Modified amino acids, short peptides and proteins that are hormones are made in the __________ ER. Where are they stored until they're ready to be released? ______ - Answers - rough; secretory vesicles