Chapter 7: The Muscular System Muscle Tissue & Sarcomere Organization Muscle Contraction Muscle Fiber Type & Energy Axial Musculature Appendicular Musculature $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

Muscle Tissue & Sarcomere Organization: $100 Question What structure divides the skeletal muscle into compartments and contains collagen fibers, elastic fibers, blood vessels, and nerves? fascicle endomysium perimysium epimysium Answer: C ANSWER BACK TO GAME

Muscle Tissue & Sarcomere Organization: $100 Answer What structure divides the skeletal muscle into compartments and contains collagen fibers, elastic fibers, blood vessels, and nerves? fascicle endomysium perimysium epimysium BACK TO GAME

Muscle Tissue & Sarcomere Organization: $200 Question Structures filled with extracellular fluid, formed by the tunneling of the sarcolemma through the muscle fiber, are called transverse tubules (T tubules). sarcomeres. sarcoplasmic reticulum. myofibrils. Answer: A ANSWER BACK TO GAME

Muscle Tissue & Sarcomere Organization: $200 Answer Structures filled with extracellular fluid, formed by the tunneling of the sarcolemma through the muscle fiber, are called transverse tubules (T tubules). sarcomeres. sarcoplasmic reticulum. myofibrils. BACK TO GAME

Muscle Tissue & Sarcomere Organization: $300 Question Which of the following accurately lists the levels of organization within a muscle from largest to smallest? muscle fiber, myofilament, myofibril myofilament, myofibril, muscle fiber muscle fiber, myofibril, myofilament Z line, A band, I band, M line Answer: C ANSWER BACK TO GAME

Muscle Tissue & Sarcomere Organization: $300 Answer Which of the following accurately lists the levels of organization within a muscle from largest to smallest? muscle fiber, myofilament, myofibril myofilament, myofibril, muscle fiber muscle fiber, myofibril, myofilament Z line, A band, I band, M line BACK TO GAME

Muscle Tissue & Sarcomere Organization: $400 Question Which of the following parts of a sarcomere contain the protein actin only? I band A band H band All of the answers are correct. Answer: A ANSWER BACK TO GAME

Muscle Tissue & Sarcomere Organization: $400 Answer Which of the following parts of a sarcomere contain the protein actin only? I band A band H band All of the answers are correct. BACK TO GAME

Muscle Tissue & Sarcomere Organization: $500 Question Which of the following statements regarding thick and thin filaments is true? The actin molecules are oriented away from the center of the sarcomere, with the heads projecting outward. The myosin molecules are oriented toward the center of the sarcomere, with the heads projecting outward. The actin molecules are oriented toward the center of the sarcomere, with the heads projecting inward. The myosin molecules are oriented toward the center of the sarcomere, with the heads projecting inward. Answer: B ANSWER BACK TO GAME

Muscle Tissue & Sarcomere Organization: $500 Answer Which of the following statements regarding thick and thin filaments is true? The actin molecules are oriented away from the center of the sarcomere, with the heads projecting outward. The myosin molecules are oriented toward the center of the sarcomere, with the heads projecting outward. The actin molecules are oriented toward the center of the sarcomere, with the heads projecting inward. The myosin molecules are oriented toward the center of the sarcomere, with the heads projecting inward. BACK TO GAME

Muscle Contraction: $100 Question Both the synaptic cleft and the motor end plate contain which of the following enzymes? acetylcholine acetylcholinesterase nicotinamide reductase serotonin decarboxylase Answer: B ANSWER BACK TO GAME

Muscle Contraction: $100 Answer Both the synaptic cleft and the motor end plate contain which of the following enzymes? acetylcholine acetylcholinesterase nicotinamide reductase serotonin decarboxylase BACK TO GAME

Muscle Contraction: $200 Question Which of the following statements regarding an action potential at the sarcolemma of a skeletal muscle cell is true? The passage of an action potential along the T tubules triggers a sudden, massive release of calcium ions by the terminal cisternae. Calcium spreads over the entire sarcolemma surface to initiate the action potential. The sudden, massive release of calcium ions triggers a sudden, massive release of calcium ions by the terminal cisternae. Sarcolemma depolarization removes calcium ions from the cytoplasm. Answer: A ANSWER BACK TO GAME

Muscle Contraction: $200 Answer Which of the following statements regarding an action potential at the sarcolemma of a skeletal muscle cell is true? The passage of an action potential along the T tubules triggers a sudden, massive release of calcium ions by the terminal cisternae. Calcium spreads over the entire sarcolemma surface to initiate the action potential. The sudden, massive release of calcium ions triggers a sudden, massive release of calcium ions by the terminal cisternae. Sarcolemma depolarization removes calcium ions from the cytoplasm. BACK TO GAME

Muscle Contraction: $300 Question What is the biochemical explanation for rigor mortis? The sarcoplasmic reticulum is unable to remove calcium ions from the sarcoplasm. Skeletal muscle fibers have too much ATP stored, resulting in sustained muscle contractions. Cross-bridges remain detached from the active sites on actin. None of the answers is correct. Answer: A ANSWER BACK TO GAME

Muscle Contraction: $300 Answer What is the biochemical explanation for rigor mortis? The sarcoplasmic reticulum is unable to remove calcium ions from the sarcoplasm. Skeletal muscle fibers have too much ATP stored, resulting in sustained muscle contractions. Cross-bridges remain detached from the active sites on actin. None of the answers is correct. BACK TO GAME

Muscle Contraction: $400 Question Which of the following statements regarding skeletal muscle contraction is false? Calcium ions bind to troponin, resulting in a conformational change in tropomyosin. Cross-bridge binding, pivoting, and detachment are powered by the breakdown of ATP. Acetylcholinesterase released by the synaptic terminal binds to receptors on the sarcolemma. None of the statements is false. Answer: C ANSWER BACK TO GAME

Muscle Contraction: $400 Answer Which of the following statements regarding skeletal muscle contraction is false? Calcium ions bind to troponin, resulting in a conformational change in tropomyosin. Cross-bridge binding, pivoting, and detachment are powered by the breakdown of ATP. Acetylcholinesterase released by the synaptic terminal binds to receptors on the sarcolemma. None of the statements is false. BACK TO GAME

Muscle Contraction: $500 Question Which is the correct sequence of steps during the contraction cycle? 1. The attached myosin head pivots toward the center of the sarcomere, and ADP and a phosphate group are released. 2. The active site is exposed following the binding of calcium ions to troponin. 3. The myosin head is reactivated as it splits the ATP and captures released energy. 4. The myosin cross-bridge forms and attaches to the exposed active sites on actin filaments. 5. Cross-bridges detach when the myosin head binds another ATP molecule. 3-4-2-1-5 2-4-1-5-3 2-1-4-5-3 2-4-1-3-5 Answer: B ANSWER BACK TO GAME

Muscle Contraction: $500 Answer Which is the correct sequence of steps during the contraction cycle? 1. The attached myosin head pivots toward the center of the sarcomere, and ADP and a phosphate group are released. 2. The active site is exposed following the binding of calcium ions to troponin. 3. The myosin head is reactivated as it splits the ATP and captures released energy. 4. The myosin cross-bridge forms and attaches to the exposed active sites on actin filaments. 5. Cross-bridges detach when the myosin head binds another ATP molecule. 3-4-2-1-5 2-4-1-5-3 2-1-4-5-3 2-4-1-3-5 BACK TO GAME

Muscle Fiber Type & Energy: $100 Question Which of the following statements regarding fast skeletal muscle fibers is true? They are small in diameter, have large glycogen reserves, and have relatively few mitochondria. They are large in diameter, with relatively few mitochondria. They have a greater oxygen supply than slow fibers. All of the statements are true. Answer: B ANSWER BACK TO GAME

Muscle Fiber Type & Energy: $100 Answer Which of the following statements regarding fast skeletal muscle fibers is true? They are small in diameter, have large glycogen reserves, and have relatively few mitochondria. They are large in diameter, with relatively few mitochondria. They have a greater oxygen supply than slow fibers. All of the statements are true. BACK TO GAME

Muscle Fiber Type & Energy: $200 Question Which of the following areas of the human body are dominated by slow fibers? eye and hand muscles back and calf muscles hand and foot muscles pelvic and leg muscles Answer: B ANSWER BACK TO GAME

Muscle Fiber Type & Energy: $200 Answer Which of the following areas of the human body are dominated by slow fibers? eye and hand muscles back and calf muscles hand and foot muscles pelvic and leg muscles BACK TO GAME

Muscle Fiber Type & Energy: $300 Question Which of the following statements regarding smooth muscle tissue is true? It utilizes pacemaker cells as a control mechanism. Tetanus cannot occur. The actin and myosin filaments are scattered throughout the sarcoplasm. It utilizes pacemaker cells as a control mechanism, and the actin and myosin filaments are scattered throughout the sarcoplasm. Answer: D ANSWER BACK TO GAME

Muscle Fiber Type & Energy: $300 Answer Which of the following statements regarding smooth muscle tissue is true? It utilizes pacemaker cells as a control mechanism. Tetanus cannot occur. The actin and myosin filaments are scattered throughout the sarcoplasm. It utilizes pacemaker cells as a control mechanism, and the actin and myosin filaments are scattered throughout the sarcoplasm. BACK TO GAME

Muscle Fiber Type & Energy: $400 Question Which of the following statements correctly describes isotonic contraction? Tension produced never exceeds the resistance. Tension remains at a constant level until relaxation occurs. An example is the reflexive contractions that keep the body upright while standing or sitting. All of the statements are correct. Answer: B ANSWER BACK TO GAME

Muscle Fiber Type & Energy: $400 Answer Which of the following statements correctly describes isotonic contraction? Tension produced never exceeds the resistance. Tension remains at a constant level until relaxation occurs. An example is the reflexive contractions that keep the body upright while standing or sitting. All of the statements are correct. BACK TO GAME

Muscle Fiber Type & Energy: $500 Question Which of the following statements about how skeletal muscles use and store energy is true? At rest, muscles use glycogen stores for energy. During light activity, muscles generate energy through the aerobic breakdown of carbohydrates, lipids, or amino acids. At peak levels of activity, muscles generate energy by aerobic breakdown of carbohydrates, lipids, or amino acids. Glycolysis produces ATP more efficiently than aerobic respiration. Answer: B ANSWER BACK TO GAME

Muscle Fiber Type & Energy: $500 Answer Which of the following statements about how skeletal muscles use and store energy is true? At rest, muscles use glycogen stores for energy. During light activity, muscles generate energy through the aerobic breakdown of carbohydrates, lipids, or amino acids. At peak levels of activity, muscles generate energy by aerobic breakdown of carbohydrates, lipids, or amino acids. Glycolysis produces ATP more efficiently than aerobic respiration. BACK TO GAME

Axial Musculature: $100 Question Which muscle inserts on the mandible and the skin of the cheek? mylohyoid stylohyoid sternohyoid platysma Answer: D ANSWER BACK TO GAME

Axial Musculature: $100 Answer Which muscle inserts on the mandible and the skin of the cheek? mylohyoid stylohyoid sternohyoid platysma BACK TO GAME

Axial Musculature: $200 Question Which muscle has as its origin the spinous processes of the lower cervical and upper thoracic vertebrae? iliocostalis semispinalis capitis quadratus lumborum external intercostals Answer: B ANSWER BACK TO GAME

Axial Musculature: $200 Answer Which muscle has as its origin the spinous processes of the lower cervical and upper thoracic vertebrae? iliocostalis semispinalis capitis quadratus lumborum external intercostals BACK TO GAME

Axial Musculature: $300 Question Which muscle functions to stabilize the central tendon of the perineum? ischiocavernosus transverse perineus rectus abdominis external anal sphincter Answer: B ANSWER BACK TO GAME

Axial Musculature: $300 Answer Which muscle functions to stabilize the central tendon of the perineum? ischiocavernosus transverse perineus rectus abdominis external anal sphincter BACK TO GAME

Axial Musculature: $400 Question Which muscle(s) function(s) to elevate, protract, and/or move the mandible to either side? masseter temporalis pterygoids masseter and temporalis Answer: C ANSWER BACK TO GAME

Axial Musculature: $400 Answer Which muscle(s) function(s) to elevate, protract, and/or move the mandible to either side? masseter temporalis pterygoids masseter and temporalis BACK TO GAME

Axial Musculature: $500 Question Which muscle inserts on the last rib and the transverse processes of the lumbar vertebrae? quadratus lumborum iliocostalis spinalis longissimus Answer: A ANSWER BACK TO GAME

Axial Musculature: $500 Answer Which muscle inserts on the last rib and the transverse processes of the lumbar vertebrae? quadratus lumborum iliocostalis spinalis longissimus BACK TO GAME

Appendicular Musculature: $100 Question Which muscle is the major abductor of the arm? infraspinatus supraspinatus deltoid pectoralis major Answer: C ANSWER BACK TO GAME

Appendicular Musculature: $100 Answer Which muscle is the major abductor of the arm? infraspinatus supraspinatus deltoid pectoralis major BACK TO GAME

Appendicular Musculature: $200 Question Which muscle originates on the anterior and superior margins of ribs 1–9? serratus anterior subclavius pectoralis minor rhomboids Answer: A ANSWER BACK TO GAME

Appendicular Musculature: $200 Answer Which muscle originates on the anterior and superior margins of ribs 1–9? serratus anterior subclavius pectoralis minor rhomboids BACK TO GAME

Appendicular Musculature: $300 Question Which muscle does not insert on the greater tubercle of the humerus? teres minor subscapularis pectoralis major supraspinatus Answer: B ANSWER BACK TO GAME

Appendicular Musculature: $300 Answer Which muscle does not insert on the greater tubercle of the humerus? teres minor subscapularis pectoralis major supraspinatus BACK TO GAME

Appendicular Musculature: $400 Question Which muscle inserts on the bases of the second and third metacarpal bones? flexor carpi ulnaris palmaris longus flexor carpi radialis extensor carpi ulnaris Answer: C ANSWER BACK TO GAME

Appendicular Musculature: $400 Answer Which muscle inserts on the bases of the second and third metacarpal bones? flexor carpi ulnaris palmaris longus flexor carpi radialis extensor carpi ulnaris BACK TO GAME

Appendicular Musculature: $500 Question Which muscle acts to flex the knee, as well as perform adduction and medial rotation at the hip? adductor brevis pectineus tensor fasciae latae gracilis Answer: D ANSWER BACK TO GAME

Appendicular Musculature: $500 Answer Which muscle acts to flex the knee, as well as perform adduction and medial rotation at the hip? adductor brevis pectineus tensor fasciae latae gracilis BACK TO GAME

contraction relaxation repeated twitching depolarization FINAL ROUND Question Curare is best known as the South American "poison arrow" toxin used for hunting. A synthetic form of curare is used routinely in emergency care to facilitate intubation. Curare specifically blocks acetylcholine (ACh) receptors. What is the result of administering curare to a skeletal muscle group? contraction relaxation repeated twitching depolarization Answer: B ANSWER BACK TO GAME

contraction relaxation repeated twitching depolarization FINAL ROUND Answer Curare is best known as the South American "poison arrow" toxin used for hunting. A synthetic form of curare is used routinely in emergency care to facilitate intubation. Curare specifically blocks acetylcholine (ACh) receptors. What is the result of administering curare to a skeletal muscle group? contraction relaxation repeated twitching depolarization BACK TO GAME