The Muscular System- Histology and Physiology Structure and Function Physiology of Skeletal Muscle Fibers Contraction of Whole Muscles Muscle Metabolism Other Muscle Types $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500 FINAL ROUND Structure and Function of Skeletal Muscle: $100 Question Each muscle cell (fiber) is surrounded by this tissue: a. perimysium b. endomysium c. epimysium d. sarcolemma ANSWER BACK TO GAME Structure and Function of Skeletal Muscle: $100 Answer Each muscle cell (fiber) is surrounded by this tissue: a. perimysium b. endomysium c. epimysium d. sarcolemma BACK TO GAME Structure and Function of Skeletal Muscle: $200 Question This statement best describes the muscle property of extensibility: a. muscles recoil to original shape b. muscles shorten forcefully c. muscles can stretch when needed d. muscles contract when stimulated ANSWER BACK TO GAME Structure and Function of Skeletal Muscle: $200 Answer This statement best describes the muscle property of extensibility: a. muscles recoil to original shape b. muscles shorten forcefully c. muscles can stretch when needed d. muscles contract when stimulated BACK TO GAME Structure and Function of Skeletal Muscle: $300 Question Troponin binds to this: a. G actin b. calcium ions c. tropomyosin d. all of these e. a and c only ANSWER BACK TO GAME Structure and Function of Skeletal Muscle: $300 Answer Troponin binds to this: a. G actin b. calcium ions c. tropomyosin d. all of these e. a and c only BACK TO GAME Structure and Function of Skeletal Muscle: $400 Question During muscle contraction, this region shortens: a. A band b. I band c. H zone d. both a and b e. both b and c ANSWER BACK TO GAME Structure and Function of Skeletal Muscle: $400 Answer During muscle contraction, this region shortens: a. A band b. I band c. H zone d. both a and b e. both b and c BACK TO GAME Structure and Function of Skeletal Muscle: $500 Question These statements about myosin myofilaments are all true except: a. are thicker than actin b. make up the H zone c. attached to the Z disc d. attached to filaments that form the M line ANSWER BACK TO GAME Structure and Function of Skeletal Muscle: $500 Answer These statements about myosin myofilaments are all true except: a. are thicker than actin b. make up the H zone c. attached to the Z disc d. attached to filaments that form the M line BACK TO GAME Physiology of Skeletal Muscle Fibers: $100 Question The resting membrane potential occurs when: a. Na+ ions diffuse into the cell b. Na+ ions diffuse out of the cell c. K+ ions diffuse into the cell d. K+ ions diffuse out of the cell ANSWER BACK TO GAME Physiology of Skeletal Muscle Fibers: $100 Answer The resting membrane potential occurs when: a. Na+ ions diffuse into the cell b. Na+ ions diffuse out of the cell c. K+ ions diffuse into the cell d. K+ ions diffuse out of the cell BACK TO GAME Physiology of Skeletal Muscle Fibers: $200 Question Depolarization must reach this value in a cell to trigger an action potential: a. 0 mv b. +20 mv c. -85 mv d. threshold ANSWER BACK TO GAME Physiology of Skeletal Muscle Fibers: $200 Answer Depolarization must reach this value in a cell to trigger an action potential: a. 0 mv b. +20 mv c. -85 mv d. threshold BACK TO GAME Physiology of Skeletal Muscle Fibers: $300 Question Energy is needed to make muscles contract and relax. True/False ANSWER BACK TO GAME Physiology of Skeletal Muscle Fibers: $300 Answer Energy is needed to make muscles contract and relax. True/False BACK TO GAME Physiology of Skeletal Muscle Fibers: $400 Question These events occur during contraction except: a. exposure of active sites on actin b. active transport of Ca+ back into sarcoplasmic reticulum c. cross-bridges are formed and released d. power stroke ANSWER BACK TO GAME Physiology of Skeletal Muscle Fibers: $400 Answer These events occur during contraction except: a. exposure of active sites on actin b. active transport of Ca+ back into sarcoplasmic reticulum c. cross-bridges are formed and released d. power stroke BACK TO GAME Physiology of Skeletal Muscle Fibers: $500 Question List the events occurring at a neuromuscular junction in order. 1. ACh binds to receptors on postsynaptic membrane 2. acetylcholinesterase breaks down ACh 3. choline is reabsorbed by presynaptic membrane 4. depolarization of sarcolemma 5. ligand-gated Na+ ion channels open a. 1,5,4,2,3 c. 1,4,2,3,5 ANSWER b. 5,3,2,1,4 d. 1,5,2,3,4 BACK TO GAME Physiology of Skeletal Muscle Fibers: $500 Answer List the events occurring at a neuromuscular junction in order. 1. ACh binds to receptors on postsynaptic membrane 2. acetylcholinesterase breaks down ACh 3. choline is reabsorbed by presynaptic membrane 4. depolarization of sarcolemma 5. ligand-gated Na+ ion channels open a. 1,5,4,2,3 c. 1,4,2,3,5 b. 5,3,2,1,4 d. 1,5,2,3,4 BACK TO GAME Contraction of Whole Muscle: $100 Question This stimulus results in the greatest force of contraction because all motor units of a muscle are responding: a. threshold b. subthreshold c. maximal d. supramaximal ANSWER BACK TO GAME Contraction of Whole Muscle: $100 Answer This stimulus results in the greatest force of contraction because all motor units of a muscle are responding: a. threshold b. subthreshold c. maximal d. supramaximal BACK TO GAME Contraction of Whole Muscle: $200 Question This kind of contraction results in an increase of tension, but the length of the muscle does not change: a. isometric b. isotonic c. concentric d. eccentric ANSWER BACK TO GAME Contraction of Whole Muscle: $200 Answer This kind of contraction results in an increase of tension, but the length of the muscle does not change: a. isometric b. isotonic c. concentric d. eccentric BACK TO GAME Contraction of Whole Muscle: $300 Question Incomplete tetanus occurs when action potentials are produced so rapidly that the muscle completely contracts without any relaxation. True/False ANSWER BACK TO GAME Contraction of Whole Muscle: $300 Answer Incomplete tetanus occurs when action potentials are produced so rapidly that the muscle completely contracts without any relaxation. True/False BACK TO GAME Contraction of Whole Muscle: $400 Question These conditions occur in both physiologic contracture and rigor mortis except: a. low levels of ATP b. cross-bridges are formed c. release of cross-bridges d. Ca2+ builds up in the sarcoplasm e. active transport of Ca2+ slows or stops ANSWER BACK TO GAME Contraction of Whole Muscle: $400 Answer These conditions occur in both physiologic contracture and rigor mortis except: a. low levels of ATP b. cross-bridges are formed c. release of cross-bridges d. Ca2+ builds up in the sarcoplasm e. active transport of Ca2+ slows or stops BACK TO GAME Contraction of Whole Muscle: $500 Question Given the following: 1. Ca2+ ions are actively transported back into sarcoplasmic reticulum 2. Troponin-tropomyosin complexes move to inhibit cross-bridge formation 3. Muscle fibers lengthen passively These events best describe: a. treppe c. contraction phase b. lag phase d. relaxation phase ANSWER BACK TO GAME Contraction of Whole Muscle: $500 Answer Given the following: 1. Ca2+ ions are actively transported back into sarcoplasmic reticulum 2. Troponin-tropomyosin complexes move to inhibit cross-bridge formation 3. Muscle fibers lengthen passively These events best describe: a. treppe c. contraction phase b. lag phase d. relaxation phase BACK TO GAME Muscle Metabolism: $100 Question Because large amounts of ATP are stored in muscle fibers, it does not need to be continuously synthesized in order to sustain muscle contractions. True/False ANSWER BACK TO GAME Muscle Metabolism: $100 Answer Because large amounts of ATP are stored in muscle fibers, it does not need to be continuously synthesized in order to sustain muscle contractions. True/False BACK TO GAME Muscle Metabolism: $200 Question These statements about creatine phosphate are true except: a. accumulates in cells to store energy b. ADP reacts with it to produce ATP c. creatine kinase is used as a catalyst d. supports intense exercise for up to 3 minutes ANSWER BACK TO GAME Muscle Metabolism: $200 Answer These statements about creatine phosphate are true except: a. accumulates in cells to store energy b. ADP reacts with it to produce ATP c. creatine kinase is used as a catalyst d. supports intense exercise for up to 3 minutes BACK TO GAME Muscle Metabolism: $300 Question Recovery consumption is used to restore homeostasis after the following: a. increase in body temperature b. changes in intracellular ion concentrations c. changes in extracellular ion concentrations d. changes in hormone levels e. all of these ANSWER BACK TO GAME Muscle Metabolism: $300 Answer Recovery consumption is used to restore homeostasis after the following: a. increase in body temperature b. changes in intracellular ion concentrations c. changes in extracellular ion concentrations d. changes in hormone levels e. all of these BACK TO GAME Muscle Metabolism: $400 Question Johnny’s primary source of energy comes from this as he runs on his treadmill for 30 minutes every morning: a. stored ATP b. aerobic respiration c. anaerobic respiration d. creatine phosphate ANSWER BACK TO GAME Muscle Metabolism: $400 Answer Johnny’s primary source of energy comes from this as he runs on his treadmill for 30 minutes every morning: a. stored ATP b. aerobic respiration c. anaerobic respiration d. creatine phosphate BACK TO GAME Muscle Metabolism: $500 Question This statement is true about anaerobic respiration: a. produces 38 ATPs per glucose molecule b. uses fatty acids for sustained exercise c. can produce ATP rapidly d. uses citric acid cycle ANSWER BACK TO GAME Muscle Metabolism: $500 Answer This statement is true about anaerobic respiration: a. produces 38 ATPs per glucose molecule b. uses fatty acids for sustained exercise c. can produce ATP rapidly d. uses citric acid cycle BACK TO GAME Other Muscle Types: $100 Question These structural characteristics apply to cardiac muscle: a. single, centrally located nucleus b. spindle shaped c. striated d. gap junctions hold cells to one another e. a and c ANSWER BACK TO GAME Other Muscle Types: $100 Answer These structural characteristics apply to cardiac muscle: a. single, centrally located nucleus b. spindle shaped c. striated d. gap junctions hold cells to one another e. a and c BACK TO GAME Other Muscle Types: $200 Question The depolarization of cardiac muscle results from the influx of both Na+ and Ca2+ across the plasma membrane. True/False ANSWER BACK TO GAME Other Muscle Types: $200 Answer The depolarization of cardiac muscle results from the influx of both Na+ and Ca2+ across the plasma membrane. True/False BACK TO GAME Other Muscle Types: $300 Question These are all properties of smooth muscle except: a. contracts when stretched b. autorhythmic c. responds in all-or-none fashion to action potentials d. exhibits relatively constant tension ANSWER BACK TO GAME Other Muscle Types: $300 Answer These are all properties of smooth muscle except: a. contracts when stretched b. autorhythmic c. responds in all-or-none fashion to action potentials d. exhibits relatively constant tension BACK TO GAME Other Muscle Types: $400 Question These are the most important neurotransmitters that regulate smooth muscle: a. acetylcholine b. norepinephrine c. dopamine d. epinephrine e. a and b ANSWER BACK TO GAME Other Muscle Types: $400 Answer These are the most important neurotransmitters that regulate smooth muscle: a. acetylcholine b. norepinephrine c. dopamine d. epinephrine e. a and b BACK TO GAME Other Muscle Types: $500 Question Waves of contraction traverse an entire sheet of visceral (unitary) smooth muscle due to the numerous gap junctions that allow action potentials to pass directly from cell to cell. True/False ANSWER BACK TO GAME Other Muscle Types: $500 Answer Waves of contraction traverse an entire sheet of visceral (unitary) smooth muscle due to the numerous gap junctions that allow action potentials to pass directly from cell to cell. True/False BACK TO GAME FINAL ROUND Question This condition would be found within the leg muscle cells of a good sprinter: a. myoglobin-rich b. contract more slowly c. large deposits of glycogen d. primarily aerobic e. numerous mitochondria ANSWER BACK TO GAME FINAL ROUND Answer This condition would be found within the leg muscle cells of a good sprinter: a. myoglobin-rich b. contract more slowly c. large deposits of glycogen d. primarily aerobic e. numerous mitochondria BACK TO GAME