QUESTION 45 Which of the following statements is FALSE? Low oxygen levels in the blood increase respiratory rate. A decrease in the pH of blood increases respiration rate. An increase in the carbon dioxide in the blood causes pH to decrease. Higher brain centers can modify the activity of the respiratory center in the medulla oblongata. The Bohr effect allows carbon dioxide to bind more easily to hemoglobin that has released its oxygen.

Messner and Habeler's 1978 ascent of Mount Everest without oxygen-breathing apparatus is often described as one of the most remarkable physical accomplishments achieved by humans. Table 1 shows respiratory gas and arterial pH values measured in a resting mountaineer at sea level, Everest base camp and Everest summit. Use the differences in these values to explain how breathing regulation changes when at rest at the 3 altitudes indicated. Calculations are not required but you may wish to consider the role of central and peripheral chemoreceptors and their relationship to paCO,, minute ventilation and alveolar pO, in your response. Table 1: Respiratory gas composition and arterial pH measured in a resting mountaineer at sea-level, Everest base-camp and Everest summit. Arterial Barometric Alveolar Inspíred p02 (FIO2) pO2 (PAO2) pCO2 (расо2) Altitude Pressure Arterial (m) pH mmHg mmHg mmHg mmHg Sea Level 760 150 106 36 7.4 Everest Base 5,400 404 75 51 20.4 7.6 Camp Everest 8,848 252 43 34…

Numbers 4&5 please

QUESTION 4 The pulmonary circuit of the circulatory system has O left atrium, left ventricle, right atrium, right ventricle, rest of the body O left atrium, right ventricle, right atrium, left ventricle and the rest of the body O right atrium, right ventricle, lungs, right atrium, right ventricle, lungs, left atrium, left ventricle, rest of the body QUESTION 5 During the systolic phase, both the left and the right atrium contract followed by the left and right ventricle True O False

VO2 calculation scenario:  Body mass= 102 kg, HR= 180 beats/min, SV= 110 ml blood/beat, venous oxygen content = 4 ml O2/100 ml blood. What is the VO2 (ml O2/kg/min) for this scenario? (round to the nearest tenth).   Remember your answer, as you will be asked to interpret this VO2 in another question.   a. 31.1   b. 776.5   c. 3.5   d. 221.8   e. 7.8

tion Completion Status: accumulation of "waste products" in cells can damage important substances (like collagen) and disrupt normal physiological processes. QUESTION 17 Lungs: With age, lung function becomes "less efficient." Which one does not explain why? Lung tissue becomes more "elastic" resulting in less expansion. O There is a decrease in "reserve capacity" that affects stamina. There is a decrease in the number of airs sacs for oxygen transport. O Muscles in the rib cage become weaker and reduce contraction. QUESTION 18 Which one below does not describe normal age-related changes in the skeletal syste O Loss of bone-density

QUESTION 8 Given the following, what is the partial pressure of gas B (mm Hg) in this mixture of gases? Mixture of gases includes gases A, B, and C. The total pressure exerted by the gaseous mixture is 300 mm Hg. Gas A = 50% of the total gas, Gas B = 10% of the total gas, and Gas C = 40% of the total gas. 50 300 30 O 10

Question 8 Which is/are true? a. The nasal cavity is lined with respiratory epithelium b. The paranasal sinuses are lined with respiratory epithelium V C. A respiratory acinus consists of a respiratory bronchiole and the all the alveoli it serves d. Respiratory epithelium is pseudostratified ciliated columnar epithelium A Moving to the next question prevents changes to this answer. DELL

Question 46 What is hemoglobin saturation at altitude (assume high altitude) with a PO2 of 50 mmHg? 55 83.5 97.5 100 DO e

QUESTION 2 The chest wall transmural pressure Atmospheric pressure (Patm) = 760 mmHg F Thoracic wall [D G 756 760 Lung A Diaphragm Alveolar pressure (Paly) equals -4 mm Hg equals 0 mm Hg cannot be determined by the information provided in this figure equals +4 mm Hg