Exam 3 study

• The neurotransmitter secreted by neurons at the neuromuscular junction is: a) epinephrine, b) norepinephrine, c) acetylcholine, d) substance x, e) none of the previous

  Answer: acetylcholine
• The role of Troponin is to: a) cover myosin binding sites, b) pass on the graded potentials, c) do the power strokes, d) release calcium from the t-tubules, e) “pull” tropomyosin off myosin binding sites

  Answer: release calcium from the t-tubules
• What is the name given to the region where the Z disc meets the sarcolemma? a) M line; b) A band; c) H zone; d) I band; e) Sarcoplasmic reticulum. Answer: I band
• An anaerobic method which gives ATP energy for approximately 20 to 60 seconds is: a) creatine phosphate, b) glycolysis, c) aerobic respiration, d) sarcolemma infusion

  Answer: glycolysis
• Which is the smallest level of skeletal muscle organization: a) fiber, b) myofiber, c) gross muscle, d) myofilaments 

  Answer: myofiber
• A hinge joint is what type of joint: a) fibrous, b) synarthrotic, c) synovial, d) saddle, e) suture

  Answer:  synovial
• 1. A suture is what type of joint: a) fibrous, b) diarthrotic, c) synovial, d) cartilaginous

  Answer: fibrous
• 1. An increase in calcium lon at the axon terminal causes: a) an action potential, b) axonal contraction, c) attaches to troponin, d) exocytosis of Ach synaptic vesicles

  Answer: exocytosis of Ach synaptic vesicles
• 1. An incroman in calcium ion released from the sarcoplasmic reticulum causes: a) an action potential, b) axonal contraction, c) attaches to troponin, d) exocytosis of Ach synaptic vesicles

  Answer: attaches to troponin
• 1. Which muscle is Not striated? a) cardiac, b) smooth), c) skeletal, d) tendons, e) osseus 

  Answer: smooth
• 1. Another name for a skeletal muscle cell is a: a) myofilament, b) myofiber, c) myofibril, d) sarcoplasm, e) sarcomere

  Answer: myofiber
• 1. The plasma membrane of skeletal muscle is called: a) t-tubule, b) axon terminal, c) sarcomere, d) sarcolemma, e) sarcoplasmic reticulum

  Answer: sarcolemma
• 1. The contractile organelles of skeletal muscle are called: a) t-tubule, b) myofibers, c) myofibrils, d) sarcolemma, e) sarcoplasmic reticulum

  Answer: myofibrils
• 1. The thick myofilament is made of: a) tropomyosin, b) actin, c) troponin, d) myosin, e) A,B, and C

  Answer: myosin
• 1. The thin myofilament is made of: a) tropomyosin, b) actin, c) troponin, d) myosin, e) A,B, and C

  Answer: tropomyosin, actin, troponin
• 1. A synarthrotic joint is a: a) freely movable, b) immovable, c) Joint with a synovial membrane, d) slightly moveable, e) connected by fibrocartilage

  Answer: immovable 
• 1. A diarthrotic joint is: a) freely movable, b) immovable, c) Joint with a synovial membrane, d) slightly moveable, e) connected by fibrocartilage

  Answer: freely movable
• 1. An anaerobic method which gives ATP energy for approximately 15 seconds is: a) creatine phosphate, b) glycolysis, c) aerobic respiration, d) sarcolemma infusion

  Answer: creatine phosphate
• 1. In a symphysis, articulating bones are: a) connected by fibrous tissue, b) fibrocartilage, c) synovial, d) areolar connective, e) none of the above

  Answer: fibrocartilage
• 1. Which below is Not a synovial joint?: a) hinge, b) ball and socket, c) symphysis, d) ellipsoidal, e) saddle

  Answer: symphysis
• 1. The greatest range of motion occurs at which joints?: a) pivot, b)ellipsoidal, c) ball and socket, d) synchondrosis, e) hinge joint

  Answer: ball and socket
• 1. An amphiarthrotic joint is a: a) freely movable, b) Immovable, c) joint with a synovial membrane, d) slightly movable, e) connected by fibrocartilage

  Answer: slightly moveable
• 1. A gomphotic joint is? a) synarthrotic, b) diarthrotic, c) sympathetic, d) amphiarthrotic, e) agomerphotic

  Answer: synarthrotic
• 1. Invaginations of the sarcolemma of the skeletal muscles are called: a) t-tubules, b) sarcomeres, c) sarcoplasmic reticulum, d) motor end plates, e) terminal cisternae

  Answer: t-tubules
• 1. The area of the skeletal muscle where calcium is stored and released prior to muscle contraction: a) t-tubules, b) sarcomeres, c) synaptic knob, d) motor end plates, e) terminal cisternae and sarcoplasmic reticulum

  Answer: terminal cisternae and sarcoplasmic reticulum
• 1. The A band in the sarcomere is: a) thin filament only, b) thick filament only, c) the length of the thick filament, d) delinates the sarcomere, e) where thick and thin filament meet

  Answer: thick filament only
• 1. The l band in the sarcomere Is: a) thin filament only, b) thick filament only, c) the length of the thick filament, d) delinates the sarcomere, e) where thick and thin filament meet

  Answer: thin filament only
• 1. The Z line in the sarcomere is: a) thin filament only, b) thick filament only, c) the length of the thick filament, d) delinates the sarcomere, e) where thick and thin filament meet

  Answer: delinates the sarcomere
• 1. An anaerobic method which gives ATP energy for hours is: a) creatine phosphate, b) glycolysis, c) aerobic respiration, d) sarcolemma infusion

  Answer: aerobic respiration
• 1. A motor unit is: a) the sarcolemma which forms the neuromuscular junction, b) a motor neuron + all the skeletal muscle fibers innervated, c) one transverse tubule + 2 terminal cisternae, d) where the calcium attaches prior to muscle contraction

  Answer: a motor neuron + all the skeletal muscle fibers innervated
• 1. The role of tropomyosin in skeletal muscle is to: a) block the myosin binding sites on actin, b) forms the Z disc, c) binds on to calcium, d) block actin binding sites on myosin, e) store calcium

  Answer: block the myosin binding sites on actin
• 1. The connective tissue covering over the grote muscle in called the: a) epineurium, b) endomysium, c) epimysium, d) endoneurium, e) perimysium

  Answer: epimysium
• 1. The connective tissue covering over the individual muscle cells is called the: a) epineurium, b) endomysium, c) epimysium, d) endoneurium, e) perimysium

  Answer: endomysium
• 1. When sarcomeres are present what is known about the muscle appearance: a) striated, b) non-striated, c) circular, d) longitudinal, e) short

  Answer: striated
• 1. ATP is needed in muscle contraction to: a) release calcium, b) open ion channels, c) break the myosin crossbridge-actin connection, d) break up sarcomeres

  Answer: break the myosin crossbridge-actin connection
• The connective tissue covering over the muscle fascicle is called the: a) epineurium, b) endomysium, c) epimysium, d) endoneurium, e) perimysium

  Answer: Perimysium