FREE AND STUDY GAMES ABOUT AP CH-9 EXAM

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QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -40 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: THE CONTRACTILE UNITS OF SKELETAL MUSCLES ARE

Answer:

MYOFIBRILS

Question 2: WHAT PRODUCES THE STRIATIONS OF A SKELETAL MUSCLE

Answer:

THE ARRANGEMENT OF MYOFILAMENTS

Question 3: WHAT IS THE CORRECT SEQUENCE OF EVENTS FOR MUSCLE CONTRACTIONS

Answer:

MOTOR NEURON ACTION POTENTIAL, NEUROTRANSMITTER RELEASE, MUSCLE CELL ACTION

POTENTIAL, RELEASE OF CALCIUM IONS FROM SR, ATP DRIVEN POWER STROKE, SLIDING OF

MYOFILAMENTS

Question 4: THE OXYGEN BINDING PROTEIN FOUND IN MUSCLE CELLS IS

Answer:

MYOGLOBIN

Question 5: WHAT IS THE FUNCTIONAL ROLE OF T TUBULES

Answer:

ENHANCE CELLULAR COMMUNICATION DURING MUSCLE CONTRACTION

Question 6: THE SLIDING FILAMENT MODEL OF CONTRACTION INVOLVES

Answer:

ACTIN AND MYOSIN SLIDING PAST EACH OTHER AND PARTIALLY OVERLAPPING

Question 7: CONTAIN ABUNDANT AMOUNTS OF GLYCOGEN

Answer:

FAST(OXIDATIVE OR GLYCOLYTIC) FATIGABLE FIBERS

Question 8: HAVE VERY FAST ACTING MYOSIN ATPases AND DEPEND UPON ANAEROBIC

METABOLISM DURING CONTRACTION.

Answer:

FAST(OXIDATIVE OR GLYCOLYTIC) FATIGABLE FIBERS

Question 9: WHAT IS NOT A ROLE OF IONIC CALCIUM IN MUSCLE CONTRACTION

Answer:

ACTIVATES EPINEPHRINE RELEASED FROM ADRENAL GLAND

Question 10: A RELATIVELY HIGH PERCENTAGE ARE FOUND IN SUCCESSFUL MARATHON

RUNNERS

Answer:

SLOW(OXIDATIVE),FATIGUE RESISTANT FIBERS

Question 11: WHICH OF THE FOLLOWING SURROUNDS THE INDIVIDUAL MUSCLE CELL

Answer:

ENDOMYSIUM

Question 12: SMOOTH MUSCLE IS CHARACTERIZED BY

Answer:

THERE ARE MORE THICK FILAMENTS THAN THIN FILAMENTS

Question 13: WHAT DESCRIBES THE CELLS OF A SINGLE UNIT VISCERAL MUSCLE

Answer:

THEY EXHIBIT SPONTANEOUS ACTION POTENTIALS

Question 14: RIGOR MORTIS OCCURS BECAUSE

Answer:

NO ATP IS AVAILABLE TO RELEASE ATTACHED ACTIN AND MYOSIN MOLECULES

Question 15: WHAT IS A TRUE STATEMENT REGARDING MUSCLE CONTRACTION

Answer:

MUSCLE TENSION REMAINS RELATIVELY CONSTANT DURING ISOTONIC CONTRACTION

Question 16: WHICH OF THE FOLLOWING ARE COMPOSED OF MYOSIN

Answer:

THICK FILAMENTS

Question 17: THE GIANT PROTEIN TITIN MAINTAINS THE ORGANIZATION OF THE ______

ASSISTING IN MUSCLE STRETCHING

Answer:

A-BAND

Question 18: WHAT IS THE ROLE OF CALCIUM IONS IN MUSCLE CONTRACTIONS

Answer:

BIND TO REGULATORY SITES ON TROPONIN TO REMOVE CONTRACTION INHIBITION

Question 19: AFTER NERVOUS STIMULATION STOPS, WHAT PREVENTS ACh IN THE

SYNAPTIC CLEFT FROM CONTINUING TO STIMULATE CONTRACTION

Answer:

ACETYLCHOLINESTERASE DESTROYING ACh

Question 20: THE MUSCLE CELL MEMBRANE IS CALLED THE

Answer:

SARCOLEMMA

Question 21: WHAT IS TRUE ABOUT SMOOTH MUSCLE

Answer:

CERTAIN SMOOTH MUSCLE CELLS CAN ACTUALLY DIVIDE TO INCREASE THEIR NUMBERS

Question 22: WHAT IS A TRUE STATEMENT OF MUSCLE CELLS

Answer:

STRIATED MUSCLE CELLS ARE LONG CYLINDRICAL WITH MANY NUCLEI

Question 23: WHAT IS NOT A WAY MUSCLE CONTRACTIONS CAN BE GRADED

Answer:

CHANGING THE TYPE OF MUSCLE FIBERS INVOLVED IN THE CONTRACTION

Question 24: DEPENDS ON OXYGEN DELIVERY AND AEROBIC MECHANMISMS

Answer:

SLOW (OXIDATIVE) FATIGUE RESISTANT FIBERS.

Question 25: WHAT IS THE FUNCTIONAL UNIT OF SKELETAL MUSCLE CALLED

Answer:

A SARCOMERE

Question 26: AN ANAEROBIC METABOLIC PATHWAY THAT RESULTS IN THE PRODUCTION OF

TWO NET ATPS PER GLUCOSE PLUS TWO PYRUVIC ACID MOLECULES IS

Answer:

GLYCOLYSIS

Question 27: RED FIBERS, THE SMALLEST OF THE FIBER TYPES

Answer:

SLOW(OXIDATIVE),FATIGUE RESISTANT FIBERS

Question 28: THE TERM APONEUROSIS REFERS TO

Answer:

A SHEETLIKE INDIRECT ATTACHMENT TO A SKELETAL ELEMENT.