A&P: Ch. 9 n 10 exam
match the following component of a muscle fiber with its description: area of the sarcomere with overlapping thick and think filaments.
A Band
which type of muscle is striated and involuntary?
Cardiac Muscle
the ability of a muscle to resume its resting length after being stretched
Elasticity
The area in the center of the A band that contains only thick filaments is the
H zone
select the description of an aponeurosis
Sheet-like indirect attachment that anchors a muscle
which type of muscle is subject to conscious control?
Skeletal Muscle
which type of muscle is nonstriated, involuntary, and found in the walls of hollow visceral organs?
Smooth Muscle
which of the following are inward invaginations of the sarcolemma that run deep into the cell between the terminal cisterns?
T-tubules
Identify the inferred action of a muscle based upon the position of the muscle relative to the joint it crosses. The type of movement for "D" is __________.
a muscle that crosses on the anterior side of a joint produces flexion
identify the inferred action of muscle based upon the position of the muscle relative to the joint it crosses. The type of movement for "A" is ____
a muscle that crosses on the lateral side of a joint produces abduction
Identify the inferred action of a muscle based upon the position of the muscle relative to the joint it crosses. The type of movement for "B" is __________.
a muscle that crosses on the medial side of a joint produces adduction
Identify the inferred action of a muscle based upon the position of the muscle relative to the joint it crosses. The type of movement for "C" is __________.
a muscle that crosses on the posterior side of a joint produces extension
a muscle that assists the muscle primarily responsible for a given action is _____
a synergist
which of the following characteristics is unique to smooth muscle?
absence of striations
The thin myofilaments of skeletal muscle are composed chiefly of __________.
actin
Identify the part of thick or thin filaments in skeletal muscle indicated by "D."
actin subunits
select the muscle that is named for its action
adductor longus
the muscles that perform most of the action in producing the movement
agonist
Match the functional group classification with the description: The muscles that perform most of the action in producing the movement.
agonists
match the following muscle action with its appropriate term: muscles that relax when the prime mover and synergists are contracting
antagonist
_____ are muscles that oppose or reverse a particular movement
antagonists
sheet-like indirect attachment that anchors a muscle
aponeurosis
match the word to its correct meaning: brachium
arm
which of the following provides the final "go signal" for contraction?
calcium ions
match the following description with the appropriate type of muscle: Usually contracts at a fairly steady rate and can contract without stimulation from the nervous system
cardiac muscle
select the characteristic of muscle tissue that sets it apart from all other tissue types
contractility
ATP is quickly converted back into useable forms by three mechanisms which of the following is NOT one of these three mechanisms?
creatine phosphate
Lies between neighboring muscles
deep fascia
select the muscle that is named for its shape
deltoid
which of the following allows recoil of the muscle fiber when contraction ends?
elastic filament
which of the following allows recoil of the muscle fiber when contraction ends
elastic filament (titin)
surrounds each muscle fiber
endomysium
Identify the structure indicated by "A" in this photomicrograph of a cross section of part of a skeletal muscle.
epimysium
surrounds an entire muscle
epimysium
the layer of dense irregular connective tissue that surrounds the entire skeletal muscle
epimysium
the layer of dense irregular connective tissue that surrounds the entire skeletal muscle is the ______
epimysium
the linking of thick and thin filaments together is called
forming cross bridges
match the description to the muscle function: release of energy during metabolism
generation of heat
select the muscle that is named for its size
gluteus maximus
please identify the molecule responsible for storage of glucose in muscle cells
glycogen
aerobic (endurance) exercise such as jogging, swimming, and biking leads to which of the following?
increased myoglobin synthesis
The attachment site of the muscle tendon to the more movable bone is called the _______.
insertion
which of the following is not a characteristic of muscle tissue?
irritability
which of the following is not a characteristic of skeletal muscle?
it can contract for long periods of time
the deltoid is a muscle named according to ____
its shape
in the neuromuscular junction there are infoldings of the sarcolemma which contain millions of acetylcholine receptors. the special infoldings are called ______
junctional folds
match the following skeletal muscle structure with the correct description: deep fascia
lies between neighboring muscles
often several criteria are combined in naming a muscle. which of the following is not described in the name extensor carpi radialis longus?
location of the muscle origin
Match the muscle function to its description: Making one tiny adjustment after another to counteract the never-ending downward pull of gravity.
maintaining posture
this is a type of muscle stimulus that creates the strongest stimulus that increases maximum contractile force to the point that all motor units have been recruited
maximal stimulus
which of the following is a special adaptation present in skeletal muscle cells, but absent in most other cells?
muscle cells have myoglobin; most other cells do not
this is a condition created by spinal reflexes that creates a constant slightly contracted state of all muscles and keeps muscles firm, healthy and ready to respond
muscle tone
Rodlike contractile elements within a muscle fiber containing myofilaments
myofibril
a sarcomere is part of a(n) _____
myofibril
The names of the muscles can indicate all of the following except
myofibril composition of the muscle
match the following muscle chemical with the correct name: oxygen storage molecule in skeletal muscle
myoglobin
"Cross bridges" that link between the thick and thin filaments directly involve_____
myosin
in the sliding filament model of muscle contraction, the myofilaments slide over each other, resulting in the overlapping of actin and
myosin
the _____ is a prime mover of arm flexion
pectoralis major
fibrous connective tissue surrounding each fascicle
perimysium
identify structure indicated by "B" in this photomicrograph of a cross section of part of a skeletal muscle
perimysium
Identify the part of thick or thin filaments in skeletal muscle indicated by "A."
portion of a thick filament
match the word to its correct meaning: transversus
right angles
match the following cellular component of a skeletal muscle fiber with its description: plasma membrane of skeletal muscle fiber.
sarcolemma
this is the plasma membrane surrounding a muscle fiber
sarcolemma
the functional unit of contraction in a skeletal muscle fiber is the _____
sarcomere
myofibrils are composed of repeating contractile elements called ____
sarcomeres
Cytoplasm of a skeletal muscle fiber
sarcoplasm
Match the word to its correct meaning: Brevis.
short
this is the type of muscle tissue that is responsible for voluntary movement
skeletal
match the following description with the correct type of muscle: striated and voluntary
skeletal muscle
which of the following muscle types is both voluntary and striated?
skeletal muscle only
match the following description to the muscle type: visceral, one nucleus per cell, and nonstriated
smooth muscle
match the following description with the appropriate type of muscle: not subject to voluntary control, is nonstriated, and contractions are slow and sustained
smooth muscle
this type of muscle is single spindle shaped, uninucleate, with no striations?
smooth muscle
Match the word to its correct meaning: Rectus.
straight
match the following skeletal muscle structure with the correct description: perimysium
surrounds each muscle bundle (fascicle)
in the sliding filament model of contraction, which of the following occurs when the muscle cell shortens?
the distance between successive Z discs shortens
which of the following muscles is voluntary
the muscle that extends the arm at the elbow
the general rule for muscle fiber recruitment would best be described by which of the following statements?
the smaller muscle fibers are recruited first, then medium fibers and last the largest and strongest fibers
select the muscle that is named for the direction of its fiber
transverse abdominis
each of the following terms is a descriptive term for a muscle's action, except ______
trapezius
match the word to its correct meaning: deltoid
triangle
isotonic contractions would be best described as which of the following?
when the muscle changes length and moves the load
match the word to its correct meaning: Carpi
wrist