BIOS 214 EXAM 2 QUESTIONS & VERIFIED ANSWERS
The layers of connective tissue surrounding a skeletal muscle from the outside to the
inside in correct order are: - Answers - Epimysium, perimysium, and endomysium
The primary types of muscle tissue include all of the following except:
Skeletal Muscle
Smooth Muscle
Appendicular Muscle
Cardiac Muscle - Answers - Appendicular Muscle
Why are skeletal muscles called voluntary? - Answers - -the individual can make a
conscious decision to contract these muscles
-these muscles are stimulated to contact by the motor nerves of the central nervous
system
Why does a skeletal muscle fiber have more than one nucleus? - Answers - During
development, groups of embryonic cells fuse together to form a single muscle fiber
The function of the neuromuscular junction is to: - Answers - Facilitate chemical
communication between the nerve and the muscle fiber with which it is associated
The cell membrane of a skeletal muscle fiber that surrounds the cytoplasm is the: -
Answers - Sarcolemma
The structures of the muscle fiber that shorten to cause skeletal muscle fiber contraction
are the: - Answers - Myofibrils
The function of T-tubules is to: - Answers - Help distribute the electrical-chemical signal
to contract throughout the muscle fiber
The repeating functional units of thick and thin filaments within a myofibril are called: -
Answers - Sarcomeres
When a sarcomere contracts, which of the following band(s) get(s) smaller? - Answers -
I band
The neurotransmitter involved in the process of contraction in skeletal muscles is: -
Answers - Acetylcholine
All the muscle fibers controlled by a single motor neuron constitute a: - Answers - Motor
unit
The greater the number of muscle fibers in each motor unit: - Answers - The less
precise the control will be
, Types of muscle fibers in the body include: - Answers - Slow, Fast, and Intermediate
The fiber mass at the middle of a muscle which has a cordlike tendon or an
apponeurosis at each end is a: - Answers - Muscle Belly
A muscle where in all the fibers come together at a common attachment site, is called
a(n): - Answers - Convergent muscle
Why does a sprinter experience fatigue after a few minutes of activity while a marathon
runner can run for hours? - Answers - Marathon runners have proportionally more of the
more-efficient red muscle fiber
Which of the following features are common to the muscles of mastication: - Answers -
They move the mandible at the temporomandibular joint
Knee extensors, known as the quadriceps femoris, include the: - Answers - Vastus
Medialis, Vastus Lateralis, Vastus Intermedius, and Rectus Femoris
Active sites on actin become available for binding when: - Answers - Calcium binds to
troponin
The deepest layer of the abdominal muscles is the: - Answers - Transversus abdominis
In a pennate muscle, the fibers are: - Answers - Oblique to the tendon
In which of the following would the ratio of motor neurons to muscle fibers be the
greatest? - Answers - Leg Muscles
Cranial Nerve VII supplies the muscles of - Answers - Facial Expression
The primary cause of rigor mortis is: - Answers - Muscle cells run out of ATP preventing
actin/myosin detachment
All of the following muscles attach to the hyoid bone except the: - Answers -
Styloglossus
The muscle just superior to the spine of the scapula that is part of the rotator cuff is the:
- Answers - Supraspinatus
A muscle whose contraction is mostly responsible for a movement is said to be the
__________ for that movement? - Answers - Agonist and prime mover
The trigeminal nerve controls which group of muscles? - Answers - Muscles of
mastication
The layers of connective tissue surrounding a skeletal muscle from the outside to the
inside in correct order are: - Answers - Epimysium, perimysium, and endomysium
The primary types of muscle tissue include all of the following except:
Skeletal Muscle
Smooth Muscle
Appendicular Muscle
Cardiac Muscle - Answers - Appendicular Muscle
Why are skeletal muscles called voluntary? - Answers - -the individual can make a
conscious decision to contract these muscles
-these muscles are stimulated to contact by the motor nerves of the central nervous
system
Why does a skeletal muscle fiber have more than one nucleus? - Answers - During
development, groups of embryonic cells fuse together to form a single muscle fiber
The function of the neuromuscular junction is to: - Answers - Facilitate chemical
communication between the nerve and the muscle fiber with which it is associated
The cell membrane of a skeletal muscle fiber that surrounds the cytoplasm is the: -
Answers - Sarcolemma
The structures of the muscle fiber that shorten to cause skeletal muscle fiber contraction
are the: - Answers - Myofibrils
The function of T-tubules is to: - Answers - Help distribute the electrical-chemical signal
to contract throughout the muscle fiber
The repeating functional units of thick and thin filaments within a myofibril are called: -
Answers - Sarcomeres
When a sarcomere contracts, which of the following band(s) get(s) smaller? - Answers -
I band
The neurotransmitter involved in the process of contraction in skeletal muscles is: -
Answers - Acetylcholine
All the muscle fibers controlled by a single motor neuron constitute a: - Answers - Motor
unit
The greater the number of muscle fibers in each motor unit: - Answers - The less
precise the control will be
, Types of muscle fibers in the body include: - Answers - Slow, Fast, and Intermediate
The fiber mass at the middle of a muscle which has a cordlike tendon or an
apponeurosis at each end is a: - Answers - Muscle Belly
A muscle where in all the fibers come together at a common attachment site, is called
a(n): - Answers - Convergent muscle
Why does a sprinter experience fatigue after a few minutes of activity while a marathon
runner can run for hours? - Answers - Marathon runners have proportionally more of the
more-efficient red muscle fiber
Which of the following features are common to the muscles of mastication: - Answers -
They move the mandible at the temporomandibular joint
Knee extensors, known as the quadriceps femoris, include the: - Answers - Vastus
Medialis, Vastus Lateralis, Vastus Intermedius, and Rectus Femoris
Active sites on actin become available for binding when: - Answers - Calcium binds to
troponin
The deepest layer of the abdominal muscles is the: - Answers - Transversus abdominis
In a pennate muscle, the fibers are: - Answers - Oblique to the tendon
In which of the following would the ratio of motor neurons to muscle fibers be the
greatest? - Answers - Leg Muscles
Cranial Nerve VII supplies the muscles of - Answers - Facial Expression
The primary cause of rigor mortis is: - Answers - Muscle cells run out of ATP preventing
actin/myosin detachment
All of the following muscles attach to the hyoid bone except the: - Answers -
Styloglossus
The muscle just superior to the spine of the scapula that is part of the rotator cuff is the:
- Answers - Supraspinatus
A muscle whose contraction is mostly responsible for a movement is said to be the
__________ for that movement? - Answers - Agonist and prime mover
The trigeminal nerve controls which group of muscles? - Answers - Muscles of
mastication
