Rio Salado BIO 201 Anatomy & Physiology Final EXAM
QUESTIONS WITH ACTUAL CORRECT DETAILED
ANSWERS
What is the connective tissue covering that encloses the sarcolemma of an individual muscle
fiber?
A) epimysium
B) perimysium
C) endomysium
D) periosteum - ANSWER-C) endomysium
What is a fascicle?
A) muscle
B) bundle of muscle fibers enclosed by a connective tissue sheath
C) bundle of myofibrils
D) group of myofilaments - ANSWER-B) bundle of muscle fibers enclosed by a connective tissue
sheath
What are the differences, if any, in the composition for thick and thin myofilaments?
A) Thin filaments contain actin, troponin and attach to the Z disc.
,B) Thick filaments contain ATPases, myosin and does not lie in the I band.
C) Thick and thin filaments generally have the same composition.
D) Both A and B are correct. - ANSWER-D) Both A and B are correct. Thin filaments contain actin,
troponin and attach to the Z disc. Thick filaments contain ATPases, myosin and does not lie in
the I band.
What are the sites called where the motor nerve impulse is transmitted from the nerve endings
to the skeletal muscle cell membranes?
A) neuromuscular junctions
B) sarcomeres
C) myofilaments
D) Z discs - ANSWER-A) neuromuscular junctions
What is a contraction elicited by a single brief stimulus called?
A) a twitch
B) wave summation
C) multiple motor unit summation
D) fused tetanus - ANSWER-A) a twitch
What is the function of T tubules in muscle contraction?
A) make and store glycogen
B) release CA2+ into the cell interior and then pick it up again
C) transmit action potential deep into the muscle cells
D) form proteins - ANSWER-C) transmit action potential deep into the muscle cells
,What is a smooth sustained contraction called that result from very rapid stimulation of the
muscle, in which no relaxation is seen?
A) a twitch
B) wave summation
C) multiple motor unit summation
D) fused tetanus - ANSWER-D) fused tetanus
Characteristics of isometric contractions include all of the following except?
A) shortening
B) increased muscle tension throughout the contraction phase
C) absence of shortening
D) use in resistance training - ANSWER-A) shortening
During muscle contraction, ATP is provided by (A) a coupled reaction of creatine phosphate with
ADP (B) aerobic respiration of glucose, and (C) anaerobic glycolysis? (multiple answers may
apply)
1) Provides ATP fastest?
2) Does/do not require that oxygen be available?
3) Highest yield of ATP per glucose molecule?
4) Results in the formation of lactic acid?
5) Has carbon dioxide and water products?
6) Most important in endurance sports? - ANSWER-1) A) a coupled reaction of creatine
phosphate with ADP
, 2) A) a coupled reaction of creatine phosphate with ADP
and C) anaerobic glycolysis
3) B) aerobic respiration of glucose
4) C) anaerobic glycolysis
5) B) aerobic respiration of glucose
6) B) aerobic respiration of glucose
What is the neurotransmitter released by somatic motor neurons called?
A) acetylcholine
B) acetylcholinesterase
C) norepinepherine - ANSWER-A) acetylcholine
What are the ions that enter the muscle cell during action potential generation called?
A) calcium ions
B) chloride ions
C) sodium ions
D) potassium ions - ANSWER-C) sodium ions
What is the special function of Myoglobin in muscle tissue?
A) break down glycogen
B) is a contractile protein
C) holds a reserve supply of oxygen in the muscle - ANSWER-C) holds a reserve supply of oxygen
in the muscle
QUESTIONS WITH ACTUAL CORRECT DETAILED
ANSWERS
What is the connective tissue covering that encloses the sarcolemma of an individual muscle
fiber?
A) epimysium
B) perimysium
C) endomysium
D) periosteum - ANSWER-C) endomysium
What is a fascicle?
A) muscle
B) bundle of muscle fibers enclosed by a connective tissue sheath
C) bundle of myofibrils
D) group of myofilaments - ANSWER-B) bundle of muscle fibers enclosed by a connective tissue
sheath
What are the differences, if any, in the composition for thick and thin myofilaments?
A) Thin filaments contain actin, troponin and attach to the Z disc.
,B) Thick filaments contain ATPases, myosin and does not lie in the I band.
C) Thick and thin filaments generally have the same composition.
D) Both A and B are correct. - ANSWER-D) Both A and B are correct. Thin filaments contain actin,
troponin and attach to the Z disc. Thick filaments contain ATPases, myosin and does not lie in
the I band.
What are the sites called where the motor nerve impulse is transmitted from the nerve endings
to the skeletal muscle cell membranes?
A) neuromuscular junctions
B) sarcomeres
C) myofilaments
D) Z discs - ANSWER-A) neuromuscular junctions
What is a contraction elicited by a single brief stimulus called?
A) a twitch
B) wave summation
C) multiple motor unit summation
D) fused tetanus - ANSWER-A) a twitch
What is the function of T tubules in muscle contraction?
A) make and store glycogen
B) release CA2+ into the cell interior and then pick it up again
C) transmit action potential deep into the muscle cells
D) form proteins - ANSWER-C) transmit action potential deep into the muscle cells
,What is a smooth sustained contraction called that result from very rapid stimulation of the
muscle, in which no relaxation is seen?
A) a twitch
B) wave summation
C) multiple motor unit summation
D) fused tetanus - ANSWER-D) fused tetanus
Characteristics of isometric contractions include all of the following except?
A) shortening
B) increased muscle tension throughout the contraction phase
C) absence of shortening
D) use in resistance training - ANSWER-A) shortening
During muscle contraction, ATP is provided by (A) a coupled reaction of creatine phosphate with
ADP (B) aerobic respiration of glucose, and (C) anaerobic glycolysis? (multiple answers may
apply)
1) Provides ATP fastest?
2) Does/do not require that oxygen be available?
3) Highest yield of ATP per glucose molecule?
4) Results in the formation of lactic acid?
5) Has carbon dioxide and water products?
6) Most important in endurance sports? - ANSWER-1) A) a coupled reaction of creatine
phosphate with ADP
, 2) A) a coupled reaction of creatine phosphate with ADP
and C) anaerobic glycolysis
3) B) aerobic respiration of glucose
4) C) anaerobic glycolysis
5) B) aerobic respiration of glucose
6) B) aerobic respiration of glucose
What is the neurotransmitter released by somatic motor neurons called?
A) acetylcholine
B) acetylcholinesterase
C) norepinepherine - ANSWER-A) acetylcholine
What are the ions that enter the muscle cell during action potential generation called?
A) calcium ions
B) chloride ions
C) sodium ions
D) potassium ions - ANSWER-C) sodium ions
What is the special function of Myoglobin in muscle tissue?
A) break down glycogen
B) is a contractile protein
C) holds a reserve supply of oxygen in the muscle - ANSWER-C) holds a reserve supply of oxygen
in the muscle
