Kimberly Crain
Quiz by , created more than 1 year ago

A quiz over the muscle tissue and it's functions. I have started off with the basic reading quiz in class along with questions from the quizbowl on Monday's review class session. I might add more to cover extra topics that were not gone over well during lecture.

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Kimberly Crain
Created by Kimberly Crain almost 4 years ago
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Chapter 10: The Muscular System

Question 1 of 48

1

Which of the following actions is caused by contraction of a skeletal muscle?

Select one of the following:

  • contraction of the heart

  • locomotion

  • movement of food through the digestive tract

  • emptying of the urinary bladder

Explanation

Question 2 of 48

1

The capacity of a muscle cell to shorten forcefully is known as

Select one of the following:

  • contractility

  • excitability

  • extensibility

  • elasticity

Explanation

Question 3 of 48

1

Muscles exhibit the property of excitability. This means that the muscle

Select one of the following:

  • shortens in legnth

  • recoils to its original resting length

  • stretches beyond its normal length

  • responds to stimulation by the nervous system

Explanation

Question 4 of 48

1

Identify the statement concerning general functional characteristics of muscle that is true.

Select one of the following:

  • muscle tissue shortens forcefully but lengthens passively

  • muscle tissue shortens passively but lengthens forcefully

  • muscle tissue can get shorter, but cannot get longer

  • muscle tissue can get longer, but cannot get shorter

Explanation

Question 5 of 48

1

Identify the statement concerning the skeletal muscle that is true.

Select one of the following:

  • It comprises about 20% of the body's weight

  • It propels urine through the urinary tract

  • Its function is largely under involuntary control

  • It is powered by ATP

Explanation

Question 6 of 48

1

Which type of muscle tissue would cause flexion and extension of the arm?

Select one of the following:

  • skeletal muscle

  • smooth muscle

  • cardiac muscle

Explanation

Question 7 of 48

1

Hypertrophy of skeletal muscles from weight lifting is caused by an increase in the

Select one of the following:

  • number of muscle fibers

  • size of muscle fibers

  • number of striations

  • number of muscle cells

Explanation

Question 8 of 48

1

Skeletal muscle develops from multinucleated cells called

Select one of the following:

  • fascicles

  • myoblasts

  • myofibrils

  • myotomes

Explanation

Question 9 of 48

1

Endomysium is a delicate network of loose connective tissue that

Select one of the following:

  • surrounds each muscle fiber

  • forms a sheath around a fasciculus

  • is composed of elastic fibers

  • separates individual muscles

  • penetrates muscle fibers

Explanation

Question 10 of 48

1

Fascia

Select one of the following:

  • surrounds individual muscles

  • separates muscle fibers

  • connects muscles to bone

  • is a type of muscle tissue

  • is a type of nerve tissue

Explanation

Question 11 of 48

1

Which of the following connective tissue layers is outside all the others?

Select one of the following:

  • perimysium

  • endomysium

  • epimysium

  • paramysium

  • sarcolemma

Explanation

Question 12 of 48

1

List the following structures in order from smallest to largest. 1. muscle fiber 2. myofilament 3. myofibril 4. muscle fasciculus

Select one of the following:

  • 4,3,2,1

  • 2,1,4,3

  • 2,3,1,4

  • 1,2,3,4

Explanation

Question 13 of 48

1

Muscle myofibrils

Select one of the following:

  • are found in the sacrolemma

  • extend from the sarcolemma to the T-tubule

  • contain myosin and actin myofilaments

  • hold muscle cells together

  • do not apper striated

Explanation

Question 14 of 48

1

The region of the sarcomere that contains both actin and myosin myofilaments is called the

Select one of the following:

  • I band

  • A band

  • Z disk

  • H zone

Explanation

Question 15 of 48

1

A sarcomere extends from

Select one of the following:

  • one Z disk to an adjacent Z disk

  • one T tubule to the next T tubule

  • the middle of the I band to the middle of the A band

  • the H zone to the I band

  • the M line to the next M line

Explanation

Question 16 of 48

1

Which of the following would contribute to muscular fatigue in the muscle fiber?

Select one of the following:

  • the emotional state of an individual

  • depletion of ATP reserves

  • inability of the motor neuron to produce sufficient quantities of acetylcholine

  • depletion of neurotransmitter

  • blocked receptors in the postsynaptic membrane

Explanation

Question 17 of 48

1

Lack of acetylcholinesterase in the synaptic cleft would result in

Select one of the following:

  • a decrease in acetylcholine production by the motor neuron

  • continuous stimulation of the motor end plate

  • rapid degradation of acetylcholine

  • relaxation of the muscle

  • continuous stimulation of the presynaptic membrane

Explanation

Question 18 of 48

1

A bi-product of anaerobic respiration in muscle cells is

Select one of the following:

  • uric acid

  • hydrochloric acid

  • lactic acid

  • carbonic acid

Explanation

Question 19 of 48

1

Which of the following is composed of myosin molecules?

Select one of the following:

  • thick myofilaments

  • I bands

  • Z disks

  • sarcolemma

  • tropomyosin

Explanation

Question 20 of 48

1

Muscle tone

Select one of the following:

  • is a time during which the tissue cannot respond

  • results in complete and incomplete tetanus

  • is a condition in which the muscle fiber only partially relaxes between contractions

  • is a condition in which stimuli occur so rapidly that there are no intervening relaxations

  • is a constant tension produce produced by muscles for long periods of time

Explanation

Question 21 of 48

1

A myofibril is the

Select one of the following:

  • cell membrane of a muscle fiber

  • cytoplasm of muscle cells

  • structural and functional unit of the skeletal muscle fiber

  • protein strand composed of actin

  • contractile thread that extends the length of the muscle fiber

Explanation

Question 22 of 48

1

The sites where a chemical substance is transmitted from the presynaptic terminal of an axon to the postsynaptic membrane of a muscle fiber are called

Select one of the following:

  • neuromuscular junctions

  • sarcomeres

  • myofilaments

  • Z disks

  • cell body of neuron

Explanation

Question 23 of 48

1

Acetylcholine is released from the synaptic terminal by the process of

Select one of the following:

  • exocytosis

  • diffusion

  • phagocytosis

  • active transport

  • endocytosis

Explanation

Question 24 of 48

1

You are hired to work in a lab to measure the rate of human muscle contraction. Which of the following might decrease in quantity in muscle cells undergoing contractions?

Select one of the following:

  • ATP

  • carbon dioxide

  • water

  • lactic acid

  • sodium

Explanation

Question 25 of 48

1

Which of the following is true about skeletal muscle?

Select one of the following:

  • Sensory neurons stimulate muscle to contract

  • There are very few blood vessels in skeletal muscle

  • Every muscle fiber receives a branch of an axon from the nerve

  • There are very few nerve fibers in a muscle

  • All of these are true

Explanation

Question 26 of 48

1

Which of the following statements regarding the sliding filament model is false?

Select one of the following:

  • actin and myosin do not shorten during contraction

  • both actin and myosin myofilaments shorten during contraction

  • the sarcomere shortens

  • the I band and H zones become narrower during contraction

  • the A band remains constant in length

Explanation

Question 27 of 48

1

Rigor mortis occurs after death because

Select one of the following:

  • cross-bridges form but can't release

  • calcium is actively transported back to the sarcoplasmic reticulum

  • anaerobic respiration is ocurring

  • myosin levels decline at death

  • cross-bridges never form

Explanation

Question 28 of 48

1

Which of the following events occurs on the postsynaptic membrane?

Select one of the following:

  • acetylcholine production

  • rapid degradation of acetylcholine

  • release of neurotransmitter

  • neurotransmitter combines with a receptor molecule

  • release of calcium ions

Explanation

Question 29 of 48

1

The model that describes the contraction of the muscle is called the

Select one of the following:

  • contraction cycle

  • power stroke

  • sliding filament model

  • slipping fibril mechanism

  • paddle

Explanation

Question 30 of 48

1

The sarcolemma is the

Select one of the following:

  • cell membrane of a muscle fiber

  • cytoplasm of muscle cells

  • structural and functional unit of the skeletal muscle cell

  • contractile thread that extends the length of the muscle fiber

  • protein strand composed of actin

Explanation

Question 31 of 48

1

A sarcomere is the

Select one of the following:

  • cell membrane of a muscle fiber

  • cytoplasm of muscle cells

  • structural and functional unit of the skeletal muscle cell

  • contractile thread that extends the length of the muscle fiber

  • protein strand composed of actin or myosin

Explanation

Question 32 of 48

1

If sodium ions cannot enter a muscle fiber in response to a stimulus,

Select one of the following:

  • contraction cannot occur

  • relaxation cannot occur

  • sodium ions will be released from the sarcoplasmic reticulum instead

  • the active sites are left exposed

  • the action potential travels into the muscle anyway

Explanation

Question 33 of 48

1

The active sites to which cross-bridges attach are found on the

Select one of the following:

  • sarcoplasmic reticulum

  • actin myofilaments

  • Z disks

  • T tubules

  • myosin myofilaments

Explanation

Question 34 of 48

1

During short periods of intense exercise, energy in muscles is primarily derived from

Select one of the following:

  • aerobic respiration

  • anaerobic respiration

  • oxidative recoupling

  • nuclear envelope reactions

Explanation

Question 35 of 48

1

A drug that interferes with the active transport of calcium ions from the sarcoplasm back into the sarcoplasmic reticulum would result in

Select one of the following:

  • relaxation of the muscle fiber

  • contraction with no relaxation

  • muscle hypertrophy

  • fibrosis of the muscle

  • an imbalance of blood calcium

Explanation

Question 36 of 48

1

A stimulus either causes an action potential or it doesn't. This is called

Select one of the following:

  • an all-or-none response

  • a graded response

  • a latent period response

  • a relative refractory response

  • an arbitrary response

Explanation

Question 37 of 48

1

T tubules are invaginations of the

Select one of the following:

  • sarcoplasmic reticulum

  • sarcomere

  • myofibril

  • sarcoplasm

  • sarcolemma

Explanation

Question 38 of 48

1

The sarcoplasmic reticulum

Select one of the following:

  • stores calcium ions

  • shortens during muscle contraction

  • transmits nerve impulses to the myofibrils

  • connects adjacent sarcomeres

  • covers the muscle fiber

Explanation

Question 39 of 48

1

Whole muscles can respond in a graded fashion to stimuli by varying

Select one of the following:

  • the force of contraction of individual muscle fibers

  • the number of motor units recruited

  • the amplitude of the action potential

  • the frequency of stimulus

  • thresholds

Explanation

Question 40 of 48

1

In order for muscle relaxation to occur,

Select one of the following:

  • calcium ions must be transported to troponin

  • power strokes slow down

  • the active sites on actin must be blocked

  • sodium ions must be actively transported to troponin

  • the active sites on myosin must be uncovered

Explanation

Question 41 of 48

1

Which of the following will respond to a threshold stimulus with an all-or-none contraction?

Select one of the following:

  • a single muscle fiber

  • a single motor unit

  • a whole muscle

  • a single muscle fiber and a single motor unit

  • a single muscle fiber, a single motor unit, and a whole muscle

Explanation

Question 42 of 48

1

Which of the following is true?

Select one of the following:

  • the greater the overlap of actin and myosin, the stronger the contraction

  • overstretching a muscle will increase its tension

  • optimal actin and myosin overlap will produce maximal contraction

  • the greatest amount of tension is achieved when actin and myosin do not overlap

  • tension is great when actin and myosin overlap as much as they can

Explanation

Question 43 of 48

1

Channels that open or close in response to changes in the electrical charge or voltage across the plasma membrane are called:

Select one of the following:

  • ligand-gated ion channels

  • non-gated ion channels

  • relegated ion channels

  • voltage-gated ion channels

  • obligated ion channels

Explanation

Question 44 of 48

1

T tubules

Select one of the following:

  • provide nutrients to the muscle fiber

  • generate new muscle fibers

  • conduct action potentials deep into the muscle cell

  • release acetylcholine

  • store calcium ions

Explanation

Question 45 of 48

1

A myofilament is the

Select one of the following:

  • cell membrane of a muscle fiber

  • cytoplasm of muscle cells

  • structural and functional unit of the skeletal muscle cell

  • contractile threat that extends the length of the muscle fiber

  • protein strand composed of actin or myosin

Explanation

Question 46 of 48

1

Tendons that form thick flattened sheets are

Select one of the following:

  • ligaments

  • endoymysium

  • collagen fibers

  • aponeuroses

Explanation

Question 47 of 48

1

The expanded ends of sarcoplasmic reticulum are called

Select one of the following:

  • transverse tubules

  • triads

  • terminal cisternae

  • myoterminals

Explanation

Question 48 of 48

1

In a typical simple muscle, the

Select one of the following:

  • origin remains stationary and the insertion moves

  • insertion remains stationary and the origin moves

Explanation

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