BIO 168 COMPREHENSIVE RECENT EXAM
QUESTIONS AND ANSWERS SURE A+
✔✔thin filaments contain actin and thick filaments contain myosin - ✔✔Thick filaments
differ from thin filaments in that thin filaments possess
✔✔Contractile proteins include titin, and nebulin which convert the chemical energy of
ATP into mechanical energy - ✔✔Which of the following statements is INCORRECT?
✔✔Calcium ions; ATP - ✔✔________ released from the sarcoplasmic reticulum bind to
troponin to trigger exposure of binding sites on actin and begin the contraction cycle.
______ supplies energy to detach the myosin head from actin.
✔✔false - ✔✔Increasing the sarcomere length so that the actin and myosin do NOT
touch results in an increase of tension during muscle contraction
✔✔acetylcholine receptors - ✔✔The motor end plate differs from the rest of the
sarcolemma in that it contains large numbers of
✔✔creatine phosphate.
anaerobic cellular respiration.
aerobic cellular respiration. - ✔✔Muscle fibers produce ATP using:
, ✔✔aerobic respiration. - ✔✔A runner nearing the end of a marathon race would
produce most ATP by:
✔✔inadequate release of calcium ions from the sarcoplasmic reticulum
depletion of creatine phosphate
insufficient oxygen, nutrient depletion, lactic acid and ADP build up - ✔✔Which of the
following contribute to muscle fatigue?
✔✔true - ✔✔Recovery oxygen uptake better describes the elevated use of oxygen after
exercise than the term oxygen debt.
✔✔a large number of small motor units - ✔✔Whole muscles that control precise
movements consist of:
✔✔true - ✔✔In motor unit recruitment, the number of active motor units increases.
✔✔true - ✔✔Muscle tone keeps muscles firm but does not produce enough force to
cause movement.
✔✔Isometric contractions result in lengthening or shortening of the muscle and moving
a load E large motor unit. - ✔✔Which of the following statements is INCORRECT?
✔✔eccentric isotonic - ✔✔On the first day of summer vacation, Preston hiked four miles
up a steep mountain trail. The following day his calf muscles were sore. What type of
contraction did walking up the mountain trail involve?
✔✔the speed of the myosin ATPase - ✔✔Skeletal muscle fibers are classified as "fast"
or "slow" based upon what factor?
✔✔slow oxidative, fast-oxidative glycolytic, fast glycolytic - ✔✔As Marie rounded the
corner, she saw that people were already boarding her bus. Worried that she would
miss her ride to campus, she sprinted to the bus stop. In what order were skeletal
muscles recruited during her sprint?
✔✔increased synthesis of thick and thin filaments - ✔✔On a cellular level, what causes
muscle hypertrophy?
✔✔presence of intercalated disks
number and size of mitochondria
QUESTIONS AND ANSWERS SURE A+
✔✔thin filaments contain actin and thick filaments contain myosin - ✔✔Thick filaments
differ from thin filaments in that thin filaments possess
✔✔Contractile proteins include titin, and nebulin which convert the chemical energy of
ATP into mechanical energy - ✔✔Which of the following statements is INCORRECT?
✔✔Calcium ions; ATP - ✔✔________ released from the sarcoplasmic reticulum bind to
troponin to trigger exposure of binding sites on actin and begin the contraction cycle.
______ supplies energy to detach the myosin head from actin.
✔✔false - ✔✔Increasing the sarcomere length so that the actin and myosin do NOT
touch results in an increase of tension during muscle contraction
✔✔acetylcholine receptors - ✔✔The motor end plate differs from the rest of the
sarcolemma in that it contains large numbers of
✔✔creatine phosphate.
anaerobic cellular respiration.
aerobic cellular respiration. - ✔✔Muscle fibers produce ATP using:
, ✔✔aerobic respiration. - ✔✔A runner nearing the end of a marathon race would
produce most ATP by:
✔✔inadequate release of calcium ions from the sarcoplasmic reticulum
depletion of creatine phosphate
insufficient oxygen, nutrient depletion, lactic acid and ADP build up - ✔✔Which of the
following contribute to muscle fatigue?
✔✔true - ✔✔Recovery oxygen uptake better describes the elevated use of oxygen after
exercise than the term oxygen debt.
✔✔a large number of small motor units - ✔✔Whole muscles that control precise
movements consist of:
✔✔true - ✔✔In motor unit recruitment, the number of active motor units increases.
✔✔true - ✔✔Muscle tone keeps muscles firm but does not produce enough force to
cause movement.
✔✔Isometric contractions result in lengthening or shortening of the muscle and moving
a load E large motor unit. - ✔✔Which of the following statements is INCORRECT?
✔✔eccentric isotonic - ✔✔On the first day of summer vacation, Preston hiked four miles
up a steep mountain trail. The following day his calf muscles were sore. What type of
contraction did walking up the mountain trail involve?
✔✔the speed of the myosin ATPase - ✔✔Skeletal muscle fibers are classified as "fast"
or "slow" based upon what factor?
✔✔slow oxidative, fast-oxidative glycolytic, fast glycolytic - ✔✔As Marie rounded the
corner, she saw that people were already boarding her bus. Worried that she would
miss her ride to campus, she sprinted to the bus stop. In what order were skeletal
muscles recruited during her sprint?
✔✔increased synthesis of thick and thin filaments - ✔✔On a cellular level, what causes
muscle hypertrophy?
✔✔presence of intercalated disks
number and size of mitochondria
