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Human A+P 1. Spring 23 > Ch 10 Muscle tissue > Flashcards

Ch 10 Muscle tissue Flashcards

1
Q

what are skeletal muscles

A

muscles that are attached to the skeletal system

This allows us to move

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2
Q

what are the 5 functions of the skeletal muscles

A
  1. to produce movement
  2. maintain posture or body position
  3. support soft tissues
  4. guard the entrances and exits of the body
  5. maintain body temp by generating body heat
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3
Q

At each end of the muscle the collagen fibers of the epidymiusm parimysium and endomymysuim come together to form a

A

Tendon

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4
Q

Muscle tissue one of the four basic tissue groups consists chiefly of cells that are highly specialized for

A

Contraction

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5
Q

In response to action potentials arriving along the transverse tubules the sarcoplasmic reticulum releases

A

Calcium ions

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6
Q

Since each myofibril is attached at either end of the muscle fiber when sarcomeres shorten the muscle fiber

A

Shortens

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7
Q

Each skeletal muscle fiber is controlled by a motor neuron at a single

A

Sarcomere

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8
Q

The plasma membrane of a skeletal muscle fiber is called

A

Sarcolemma

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9
Q

The repeating unit of a skeletal muscle fiber is the

A

Sarcomere

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10
Q

The region of the sarcomere that always contains thin filaments is the

A

iBand

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11
Q

A resting muscle generates most of its ATP by

A

Aerobic metabolism

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12
Q

Which of the following types of muscle fibers are best adapted for prolonged contractions such as standing all day

A

Slow fibers

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13
Q

Thin filaments are mostly made of the protein

A

Actin

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14
Q

The region of the sarcomere containing the thick filament is the

A

H band

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15
Q

The increase in muscle tension that is produced by increasing the number of active motor units is called

A

Recruitment

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16
Q

How would an elevated level of thyroid hormone in the body affect skeletal muscles

A

It would stimulate energy use in heat production

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17
Q

The bundle of collagen fibers at the end of a skeletal muscle that attaches muscle to bone is called a

A

Tendon

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18
Q

Repeating unit of striated myofibrils

A

Sarcomere

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19
Q

When calcium ion binds to troponin

A

Tropomyosin rolls away from the active site

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20
Q

After death muscle fibers run out of ATP and calcium begins to leak from the sarcoplasmic reticulum into the sarcoplasm this results in a condition known as

A

Rigor mortis

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21
Q

The area of the a band that contains no thin filaments is the

A

H band

22
Q

When a skeletal muscle fiber contracts the zones of overlap get

A

Larger

23
Q

During the time when the action potential moves through the sarcolemma a muscle twitch is in

A

Latent period

24
Q

Because the cells of skeletal muscle are relatively large and cylindrical in shape, they are also known as __________.

A

fibers

25
Q

Skeletal muscle cells have more than one nucleus.

A

True

26
Q

Each muscle cell is surrounded by thin connective tissue called the __________.

A

endomysium

27
Q

A cordlike structure that connects a muscle to another muscle or bone is __________.

A

a tendon

28
Q

The neuron and muscle fiber membranes do NOT actually touch but are separated by a fluid-filled gap

A

True

29
Q

The contractile unit of muscle is the __________.

A

sarcomere

30
Q

What process directly inhibits acetylcholine (ACh) release after a Botox® injection?

A

exocytosis

31
Q

A muscle fiber is ________.

A

a muscle cell

32
Q

What is the correct order of structures as you move from outside a muscle cell, to deep inside it?

A

fiber, myofibril, myofilament

33
Q

The actual contractile units of muscles extend from Z disc to Z disc. They are ________

A

sarcomeres

34
Q

This contractile protein forms the thin filaments.

A

actin

35
Q

This contractile protein is shaped like a golf club.

A

myosin

36
Q

The dark band of skeletal muscle consists of ________

A

both thick and thin filament

37
Q

This indentation of the sarcolemma carries electrical signals deep into the muscle cells.

A

T tubule

38
Q

From gross to microscopic, the parts of a muscle are _______

A

muscle, fascicle, fiber

39
Q

Each of the elements that make up a skeletal muscle is surrounded by connective tissue. Which words below correctly pair the connective tissue layer with the corresponding muscle structure?

A

fascicle: perimysium

40
Q

This strong, cord-like structure attaches muscles to bones.

A

tendon

41
Q

The neuromuscular junction consists of ________.

A

the axon terminal coming into close proximity to a muscle fiber

42
Q

The space between the axon terminal and the sarcolemma of a muscle fiber is called the ________.

A

synaptic cleft

43
Q

A neuron and all the muscle fibers it stimulates is called a ________

A

motor unit

44
Q

Sarcomeres consist of ________.

A

orderly arrangements of actin and myosin

45
Q

The thick and thin filaments are made up of ________, respectively.

A

myosin and actin

46
Q

An aponeurosis is ________.

A

similar to a tendon in function

47
Q

The function of the neuromuscular junction is to ________.

A

convey a signal from the nervous system to skeletal muscle

48
Q

At the neuromuscular junction, the electrical signal of the nerve ________

A

causes the axon terminal to release acetylcholine (ACh)

49
Q

Acetylcholine (ACh) is the neurotransmitter of axon terminals at the neuromuscular junction. It ________

A

binds to receptors on the muscle membrane

50
Q

The I-band consists of ________

A

thin filaments

51
Q

A triad consists of ________.

A

terminal cisternae and T-tubules

Human A+P 1. Spring 23 (17 decks)

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