BSC 2093 (IRSC) Test 3
Which of the following most aptly describes "muscle insertion"? - ANSWERtendon
attachment that moves
Tom, a trumpet player, asks you which muscles he should develop in order to be a
better trumpeter. What would you tell him? - ANSWERthe buccinator and orbicularis
oris
The bundle of collagen fibers at the end of a skeletal muscle that attaches the muscle to
bone is called a(n) - ANSWERtendon
During the ________ phase of action potential development, voltage-gated sodium
channels are open. - ANSWERdepolarization
What sarcomere characteristic affects the amount of tension produced when a skeletal
muscle fiber contracts? (Module 9.9A) - ANSWERThe length of the sarcomere.
Each of the following terms is a descriptive term for a muscle's action except -
ANSWERsartorius.
Tom is having difficulty plantar flexing and everting his foot. Which muscle is most likely
involved in this problem? - ANSWERFibularis longus
The Na+/K+ ion pump is responsible for - ANSWERmaintaining the sodium/potassium
concentration gradients constant.
Identify the muscle labeled "2." - ANSWERdeltoid
The area in the center of the A band that contains no thin filaments is the - ANSWERH
band
An alternate name for the prime mover in muscle action is the - ANSWERagonist
Twelve-year-old Aaron tried out for the Little League baseball team and was chosen as
a pitcher. One day, after a few months of practice and games, Aaron's father told him,
"Hey, kid, you're really getting some muscle definition there! You're going to be a major
league pitcher someday, with muscles like that!" Which of Aaron's muscles in particular
do you think were growing stronger and getting larger as a result of his pitching? -
ANSWERdeltoid, triceps brachii, and brachioradialis
Compare F-actin with G-actin. (Module 9.4A) - ANSWERF actin is a twisted strand
made up of two rows of G actin subunits where myosin heads can bind.
Which of the following muscles has its origin on the hyoid and inserts on the tongue? -
ANSWERHyoglossus
, BSC 2093 (IRSC) Test 3
Name the three types of muscle tissue, identify where they are found, and list their
functions. (Module 9.1A) - ANSWERSkeletal muscle is directly or indirectly attached to
bones and enables movement of the body. Cardiac muscle forms the heart and propels
blood. Smooth muscle is found throughout the body and moves substances through
hollow tubes, such as in the digestive tract and regulates the diameter of blood vessels.
The sternocleidomastoid inserts on the - ANSWERmastoid process.
Reflection of the trapezius muscle exposes - ANSWERthe rhomboid minor and levator
scapulae muscles.
When a skeletal muscle fiber contracts, which of the following does not occur? -
ANSWERMyosin and actin filaments decrease in length.
The end of a muscle that remains stationary when the muscle contracts is called the -
ANSWERorigin
Cross-bridges are portions of - ANSWERmyosin molecules.
Which of the following best describes the sarcoplasmic reticulum? - ANSWERstorage
and release site for calcium ions
The action potential is conducted into a skeletal muscle fiber by - ANSWERtransverse
tubules
The pectoralis major muscle inserts on the greater tubercle of the humerus. When it
contracts, it does not provide - ANSWERlateral motion at the shoulder.
Which of the following best describes the term "Z line"? - ANSWERwhere thin filaments
are anchored
Cellular membrane potential is measured in - ANSWERmillivolts
At rest, active sites on the actin are blocked by - ANSWERtropomyosin molecules
A muscle that assists the muscle that is primarily responsible for a given action is a(n) -
ANSWERsynergist
Which axial muscle is often known as the "six-pack" in physically fit people? -
ANSWERRectus abdominus
Identify the muscle labeled "11." - ANSWERBiceps femoris
All of the following provides flexion of the knee except - ANSWERrectus femoris
Identify the muscle labeled "12" - ANSWERgastrocnemius
Which of the following most aptly describes "muscle insertion"? - ANSWERtendon
attachment that moves
Tom, a trumpet player, asks you which muscles he should develop in order to be a
better trumpeter. What would you tell him? - ANSWERthe buccinator and orbicularis
oris
The bundle of collagen fibers at the end of a skeletal muscle that attaches the muscle to
bone is called a(n) - ANSWERtendon
During the ________ phase of action potential development, voltage-gated sodium
channels are open. - ANSWERdepolarization
What sarcomere characteristic affects the amount of tension produced when a skeletal
muscle fiber contracts? (Module 9.9A) - ANSWERThe length of the sarcomere.
Each of the following terms is a descriptive term for a muscle's action except -
ANSWERsartorius.
Tom is having difficulty plantar flexing and everting his foot. Which muscle is most likely
involved in this problem? - ANSWERFibularis longus
The Na+/K+ ion pump is responsible for - ANSWERmaintaining the sodium/potassium
concentration gradients constant.
Identify the muscle labeled "2." - ANSWERdeltoid
The area in the center of the A band that contains no thin filaments is the - ANSWERH
band
An alternate name for the prime mover in muscle action is the - ANSWERagonist
Twelve-year-old Aaron tried out for the Little League baseball team and was chosen as
a pitcher. One day, after a few months of practice and games, Aaron's father told him,
"Hey, kid, you're really getting some muscle definition there! You're going to be a major
league pitcher someday, with muscles like that!" Which of Aaron's muscles in particular
do you think were growing stronger and getting larger as a result of his pitching? -
ANSWERdeltoid, triceps brachii, and brachioradialis
Compare F-actin with G-actin. (Module 9.4A) - ANSWERF actin is a twisted strand
made up of two rows of G actin subunits where myosin heads can bind.
Which of the following muscles has its origin on the hyoid and inserts on the tongue? -
ANSWERHyoglossus
, BSC 2093 (IRSC) Test 3
Name the three types of muscle tissue, identify where they are found, and list their
functions. (Module 9.1A) - ANSWERSkeletal muscle is directly or indirectly attached to
bones and enables movement of the body. Cardiac muscle forms the heart and propels
blood. Smooth muscle is found throughout the body and moves substances through
hollow tubes, such as in the digestive tract and regulates the diameter of blood vessels.
The sternocleidomastoid inserts on the - ANSWERmastoid process.
Reflection of the trapezius muscle exposes - ANSWERthe rhomboid minor and levator
scapulae muscles.
When a skeletal muscle fiber contracts, which of the following does not occur? -
ANSWERMyosin and actin filaments decrease in length.
The end of a muscle that remains stationary when the muscle contracts is called the -
ANSWERorigin
Cross-bridges are portions of - ANSWERmyosin molecules.
Which of the following best describes the sarcoplasmic reticulum? - ANSWERstorage
and release site for calcium ions
The action potential is conducted into a skeletal muscle fiber by - ANSWERtransverse
tubules
The pectoralis major muscle inserts on the greater tubercle of the humerus. When it
contracts, it does not provide - ANSWERlateral motion at the shoulder.
Which of the following best describes the term "Z line"? - ANSWERwhere thin filaments
are anchored
Cellular membrane potential is measured in - ANSWERmillivolts
At rest, active sites on the actin are blocked by - ANSWERtropomyosin molecules
A muscle that assists the muscle that is primarily responsible for a given action is a(n) -
ANSWERsynergist
Which axial muscle is often known as the "six-pack" in physically fit people? -
ANSWERRectus abdominus
Identify the muscle labeled "11." - ANSWERBiceps femoris
All of the following provides flexion of the knee except - ANSWERrectus femoris
Identify the muscle labeled "12" - ANSWERgastrocnemius
