ESS2001 Physiology Chapter 8 exphys Exam Questions And Answers Verified 100% Correct

ESS2001 Physiology Chapter 8 exphys Exam Questions And Answers Verified 100% Correct Cardiovascular drift is assoicated with a. increased muscle sympatholysis b. increased cardiac output c. decreased venous return d. decreased heart rate - ANSWER c. decreased venous return Ventilation is a. directly proportional to exercise intensity b. inversely proportional to exercise intensity c. not related to exercise intensity d. primarily an anticipatory response to exercise - ANSWER a. directly proportional to exercise intensity Which of the following is NOT true about cardiac output? a. It decreases as difference increases. b. It increases linearly with exercise intensity. c. It is the primary limiting factor of VO2max d. It is the product of stroke volume and heart rate. - ANSWER a. It decreases as difference increases. If heart rate and work load are known, ________ can be predicted a. VO2 max b. cardiac output c. ventilatory threshold d. lactate threshold - ANSWER VO2 max Based on breathing patterns immediately after exercise, postexercise breathing is most likely a. perfectly matched to metabolic need b. determined by PO2 c. mediated solely by neural mechanisms d. regulated by blood pH, PCO2, and temperature - ANSWER d. regulated by blood pH, PCO2, and temperature Which of these systolic pressures would realistically be seen at maximal endurance exercise? a. 80mmHg b. 120mmHg c. 160mmHg d. 200mmHG - ANSWER d. 200mmHg Why does hyperventilation decrease the drive to breathe? a. It decreases PCO2 and increases pH. b. It increases PCO2 and decreases pH. c. It increases PO2 and decreases pH. d. It decreases PO2. - ANSWER a. It decreases PCO2 and increases pH. Which of the following best describes HRmax? a. reached at ~40 to 50% VO2max b. achieved after all-out effort to volitional fatigue c. stimulated by the parasympathetic nervous system d. artificially lowered by high blood H+ content - ANSWER b. achieved after all-out effort to volitional fatigue During endurance exercise, total peripheral resistance a. increases greatly b. increases somewhat c. stays constant d. decreases - ANSWER d. decreases A typical HIIT workout consists of 4 to 6 bouts of _______ seconds of all-out cycling followed by ____ minutes of recovery. a. 10,5 b. 20,10 c. 30,3 d. 45,1 - ANSWER c. 30,3 Which two factors are most commonly manipulated in training for increased performance? a. intensity and frequency b. frequency and rest intervals c. rest intervals and volume d. volume and intensity - ANSWER d. volume and intensity If the rate of oxidative production of ATP is low, then a. aerobic power is low b. aerobic power is high c. anaerobic power is low d. anaerobic power is high - ANSWER a. aerobic power is low The best determinant of the length of a rest interval is a. distance walked b. duration c. heart rate d. blood lactic acid concentrations - ANSWER c. heart rate The explosive aspect of strength is a. muscular endurance b. aerobic power c. maximal anaerobic power d. power - ANSWER d. power As muscles become stronger, what is required in order to continue gaining strength? a. higher resistance b. lower intensity c. decreased overload d. continuation of the same training program - ANSWER a. higher resistance Maximal anaerobic capacity would involve a. maximal ATP production from PCr b. maximal ATP production from oxygen-dependent pathways c. maximal ATP production from NADH d. maximal ATP production in the mitochondria - ANSWER a. maximal ATP production from PCr