HPEX 375 chapters 0, 2, 3, 4 quiz review Which of the following terms best describes a change in the structure and/or function of a cell or organ system that results in an improved ability to mainta... in homeostasis? - ✔✔adaption When constructing a graph, what variable is placed on the x-axis? - ✔✔independent variable Which of the following is defined as the maintenance of a constant or unchanging "normal" internal environment during unstressed (resting) conditions? - ✔✔homeostasis Which of the following is best defined as "any bodily movement, produced by skeletal muscles, that results in energy expenditure"? - ✔✔Physical activity Who was the director of the Harvard Fatigue Lab from 1927-1947? - ✔✔D.B. Dill True or False : Fatigue is the inability to maintain power output and will result in reduced physical performance. - ✔✔True The control center, which is an important component of a biological control system, is often also referred to as the ... - ✔✔Integrating center True or False : Juxtacrine signaling occurs when a chemical messenger (i.e., a hormone) is released into the blood and affects cells throughout the body that have specific receptors for that hormone. - ✔✔False True or False : Generally, the higher the intensity, the shorter the duration of any acute bout of exercise. - ✔✔True Which of the following DID NOT receive a Nobel prize for work done in areas related to Exercise Physiology? - ✔✔J.S. Haldane Which of the following refers to the chemical process involved with the production of cellular ATP? - ✔✔Bioenergetics Starting with one glucose molecule, how many NADH would be made (and subsequently used in the electron transport chain) during SLOW glycolysis? - ✔✔10 True or False: Lactate Dehydrogenase is a rate limiting enzyme in glycolysis and is inhibited by high concentration of hydrogen ions (H+) - ✔✔False The process of aerobic production of ATP (called oxidative phosphorylation) occurs in the mitochondria using a pathway that is called the .... - ✔✔Electron Transport Chain What is the name of the enzyme that breaks down glycogen to glucose-6-phosphate (through glucose-1-phosphate) so that it can undergo glycogenolysis? - ✔✔glycogen phosphorylase Which of the following enzymes catalyze a reaction where NAD is a product? - ✔✔Lactate dehydrogenase How many total ATP can be formed from a single pyruvate molecule? - ✔✔ Which of the following molecules contain more than 3 carbons? - ✔✔Glucose, Oxaloacetate, Citrate Which of the following is a product of the reaction catalyzed by the enzyme Phosphofructokinase? - ✔✔ How many total ATP can we net from one glycogen molecule through the entire process of SLOW glycogenolysis? - ✔✔33 True or False : Fats are the primary fuel source for muscle during high intensity exercise since fats represent a more energy dense molecule. - ✔✔False Which of the following R values would suggest that steady state exercise is being fueled by 50% fat and 50% carbohydrate? - ✔✔.85 The lag in oxygen consumption at the beginning of exercise has been termed the .... - ✔✔oxygen deficit Some Exercise Physiologists have replaced the classical term, "oxygen debt" with ... - ✔✔Excess post-exercise oxygen consumption (EPOC) True or False : For a given absolute workload, oxygen deficit would be lower for a trained individual compared to an untrained individual - ✔✔True Which of the following would likely contribute to an increase in lactate production in the cell? - ✔✔an increased rate of pyruvate formation, a high NADH to NAD ratio, an LDH isozyme with a high affinity for pyruvate Which of the following are possible mechanisms to explain the lactate threshold? - ✔✔low muscle oxygen, accelerated glycolysis due to epinephrine, recruitment of fasttwitch fibers, reduced rate of lactate removal [Show More]
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