Chapter 9: Muscles Test Bank
A myosin molecule in the thick filaments can be considered a protein having a
quaternary structural level. Which best describes this structural level? - ANS -
Myosin molecules consist of two heavy and two light polypeptide chains
\A potential benefit of recruiting slow oxidative fibers for contraction before
recruiting fast oxidative and fast glycolytic fibers might be - ANS - this will help to
allow for fine control with delicate contractile force with a small stimulus
\Addition of more mitochondria to a muscle fiber will have the least effect on
________. - ANS - fast glycolytic fibers
\Addition of more myoglobin to a muscle fiber would have the largest effect on
________. - ANS - fast oxidative and slow oxidative fibers
\After nervous stimulation stops, what prevents ACh in the synaptic cleft from
continuing to stimulate contraction? - ANS - acetylcholinesterase destroying the
ACh
\Although all the anatomical parts of muscle work together to give it its
characteristics, which of the following proteins listed below would be most
associated with the characteristics of excitability? - ANS - acetylcholine receptors
in the motor end plate
\Although all the anatomical parts of muscle work together to give it its
characteristics, which of the following proteins listed below would be most
associated with the characteristics of extensibility? - ANS - elastic (titin) filaments
\An anaerobic metabolic pathway that results in the production of two net ATPs
per glucose plus two pyruvic acid molecules is ________. - ANS - Glycolysis
\Approximately 80% of a muscle fiber's volume are the myofibrils. This
characteristic reflects muscles ability to ________. - ANS - produce movement
through contractile force
\Creatine phosphate functions in the muscle cell by - ANS - storing energy that
will be transferred to ADP to resynthesize ATP
\During development embryonic cells will fuse to form muscle fibers. This will
result in - ANS - multinucleated muscle fibers that can extend as long as 30
centimeters
\During muscle contraction, myosin cross bridges attach to which active sites? -
ANS - actin filaments
\During vigorous exercise, there may be insufficient oxygen available to
completely break down pyruvic acid for energy. As result, the pyruvic acid is
converted to - ANS - lactic acid
A myosin molecule in the thick filaments can be considered a protein having a
quaternary structural level. Which best describes this structural level? - ANS -
Myosin molecules consist of two heavy and two light polypeptide chains
\A potential benefit of recruiting slow oxidative fibers for contraction before
recruiting fast oxidative and fast glycolytic fibers might be - ANS - this will help to
allow for fine control with delicate contractile force with a small stimulus
\Addition of more mitochondria to a muscle fiber will have the least effect on
________. - ANS - fast glycolytic fibers
\Addition of more myoglobin to a muscle fiber would have the largest effect on
________. - ANS - fast oxidative and slow oxidative fibers
\After nervous stimulation stops, what prevents ACh in the synaptic cleft from
continuing to stimulate contraction? - ANS - acetylcholinesterase destroying the
ACh
\Although all the anatomical parts of muscle work together to give it its
characteristics, which of the following proteins listed below would be most
associated with the characteristics of excitability? - ANS - acetylcholine receptors
in the motor end plate
\Although all the anatomical parts of muscle work together to give it its
characteristics, which of the following proteins listed below would be most
associated with the characteristics of extensibility? - ANS - elastic (titin) filaments
\An anaerobic metabolic pathway that results in the production of two net ATPs
per glucose plus two pyruvic acid molecules is ________. - ANS - Glycolysis
\Approximately 80% of a muscle fiber's volume are the myofibrils. This
characteristic reflects muscles ability to ________. - ANS - produce movement
through contractile force
\Creatine phosphate functions in the muscle cell by - ANS - storing energy that
will be transferred to ADP to resynthesize ATP
\During development embryonic cells will fuse to form muscle fibers. This will
result in - ANS - multinucleated muscle fibers that can extend as long as 30
centimeters
\During muscle contraction, myosin cross bridges attach to which active sites? -
ANS - actin filaments
\During vigorous exercise, there may be insufficient oxygen available to
completely break down pyruvic acid for energy. As result, the pyruvic acid is
converted to - ANS - lactic acid
