7197818
Description
Flashcards by Lucy Rubio, updated more than 1 year ago
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Created by Lucy Rubio
over 7 years ago
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| Question | Answer |
| 2 protein filaments responsible for muscle contraction? | myosin and actin |
| explain the size principle of motor unit recruitment | the order recruitment of motor units is directly related to the size of their motor neuron (motor units w/ smaller neurons are recruited first) |
| what is the sliding filament theory? | myosin cross-bridge attaches to an actin filament, then the power stroke drags the 3 filaments past each other |
| where does the oxidative (aerobic) system produce ATP? | Mitochondria |
| oxidative production of ATP from carbs involves what 3 processes? | glycolysis, the krebs cycle, the electron transport chain |
| free fatty acids have more CO2 and H2O, but less O2 than glucose. T/F? | true |
| what is basal metabolic rate (BMR)? | rate of energy expenditure at rest; patient in a supine position, done after 8 h of sleep and a 12 h fasting |
| what is resting metabolic rate (RMR)? | similar to BMR, but doesn't require stringent standardized conditions |
| what is maximal O2 uptake (VO2max)? | point at which o2 consumption doesn't increase with further increased intensity |
| what is lactate threshold? | point at which blood lactate accumulation increases markedly |
| what is excess post-exercise O2 consumption (EPOC)? | the volume of o2 consumed during the mins immediately after exercise (breathing hard, high HR) |
| what is required in order to be successful in aerobic endurance exercises? | 1. high VO2max 2. high lactate threshold 3. high economy of effort or low VO2 4. high % of type I muscle fibers |
| principle of individuality | each person responds differently to training; programs should allow for individual variation |
| principle of specificity | training should be specific to athlete's sport/activity |
| principle of detraining | training benefits are lost if training is discontinued; "you use or you lose it" |
| principle of overload | increase demands on body to make improvements |
| principle of variation | change one or more variables to make training challenging |
| when developing a program, large muscle groups should be worked before smaller groups. T/F? | true |
| what are the functions of the cardiovascular system? | delivers o2, removes co2, transports hormones, temperature balance, fluid regulation, acid-base balance |
| which part of the heart has the most myocardium? | left ventricle |
| how many grams is considered "protein overfeeding?" | 4.4 g per kg per day |
| what are the 6 nutritional strategies? | 1. eat less calories 2. macronutrient % 3. macronutrient sub-types 4. nutrient timing 5. intermittent fasting 6. supplements |
| DOMS is caused by tears in muscle due to concentric loads. T/F? | false (eccentric loads) |
| what is the fick equation? | VO2 = Q x AVO2 diff |
| what is the cardiac output equation? | HR x SV |
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