Fundamentals Of Human Physiology Exam 3 Uiowa Questions And Answers Verified 100% Correct

Fundamentals Of Human Physiology Exam 3 Uiowa Questions And Answers Verified 100% Correct calcium binds to _____ in muscle contraction - ANSWER -troponin at rest, calcium is ____ intracellular and stored in ____ - ANSWER -low, sarcoplasmic reticulum t tubules - ANSWER -dive deep into muscles AP goes down and SR senses calcium levels muscle relaxation - ANSWER -remove calcium pump back into SR use calcium and ATP pump / active transport roles of ATP in muscle contraction - ANSWER -splitting of ATP by myosin ATPase provides energy binding of ATP to myosin to let cross bridge detach from actin active transport of calcium back into SR load - ANSWER -force exerted on muscle by weight of object tension - ANSWER -force exerted on an object by contracting muscle tension > load - ANSWER -can lift object load > tension - ANSWER -cannot lift object muscle twitch - ANSWER -response of a single muscle fiber to single AP latent period of twitch - ANSWER -space until actually generating tension, need new cross bridges to generate tension contraction period of twitch - ANSWER -generating tension relaxation time - ANSWER -inside the muscle calcium has to be pumped back into SR skeletal muscle summating - ANSWER -increasing frequency of a stimulus muscle is stimulated again before relaxation tetanus - ANSWER -fused muscle contraction usually 3-4x greater than single twitch isotonic muscle contraction - ANSWER -tension and change in muscle length concentric and eccentric concentric muscle contraction - ANSWER -muscle shortens ex) curling bicep eccentric muscle contraction - ANSWER -muscle lengthens ex) lowering bicep isometric muscle contraction - ANSWER -tension but no length change load > tension ex) trying to push against a wall nervous system control of muscle tension - ANSWER -frequency of stimulation motor unit recruitment muscle control of muscle tension - ANSWER -properties of skeletal muscles how many fibers what kind length of fiber at contraction onset extent of fatigue cross section fiber recruitment of motor units - ANSWER -adapting the number of active motor units little fibers for delicate movements and lots of fibers for powerful movements length of skeletal muscles in relation to tension - ANSWER -shortened muscles can't develop as much tension (less actin / myosin overlap) velocity - ANSWER -not necessarily more tension but going faster slow-oxidative pathway - ANSWER -type 1 slow energy from oxidative phosphorylation red in color fast-oxidative glycolytic - ANSWER -type 2a fast uses glycolysis and oxidative phosphorylation pink in color fast glycolytic - ANSWER -type 2x fast uses glycolysis white in color order or recruitment for skeletal muscles - ANSWER -always start with type 1 if want to go faster/ heavier, used type 2x LAST fatigue - ANSWER -decline in muscle tension as a result of previous contractile action neural stimulation continues fatigue depends on - ANSWER -type of skeletal muscle intensity and duration individual fitness fatigue factors - ANSWER -internal acidity K+ accumulation glycogen depletion reduced SR caldium release fatigue of brain adaptations to endurance training - ANSWER -increased ability to use fatty acids as fuel increased triglyceride storage increased capillary density increase number of mitochondria increase in krebs cycle enymes increase in strength adaptations to resistance training - ANSWER -promotes hypertrophy of fast glycolytic fibers