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