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A & P Unit 2 > Chapter 9 Muscles > Flashcards

Chapter 9 Muscles Flashcards

1
Q

Describe blood supply in muscles

A

arteries deliver oxygen and nutrients to our muscles

veins carry waste away from the muscles

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2
Q

Smooth muscle tissue

A

not striated

involuntary

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3
Q

Skeletal muscle tissue

A

striations

voluntary

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4
Q

Cardiac muscle tissues

A

striated

involuntary

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5
Q

Contractility is the

A

ability to shorten

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6
Q

Extensibility is the

A

ability to be extended or stretched

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7
Q

Elasticity is the

A

ability to recoil

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8
Q

what are the 3 things muscles maintain

A

posture

stabilize joints

generate heat

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9
Q

Structure and Organization of skeletal muscles

A

Muscle is the organ

muscles is covered externally by the epimysium

we have hundreds of thousands of muscle cells

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10
Q

What are the three conncective tissue sheaths

A

epimysium

perimysium

endomysium

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11
Q

espimysium

A

epi means above or upon

dense regular connective tissue

surrounds the muscle

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12
Q

perimysium

A

surrounds fascicle

fibrous connective tissue

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13
Q

endomysium

A

surrounds muscle fibers

reticular fibers

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14
Q

Be able to label identify:

thick filaments

think filaments

z discs/lines

M line

I band

A band

H zone

A
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15
Q

what is the functions of the sarcoplasmic reticulum?

A
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16
Q

where do the t tubules conduct impulse?

A

the conduct muscle impulses to the deepest region of the muscles

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17
Q

What do t tubules impulses cause release of?

A

calcium

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18
Q

explain step by step what happens when a stimulus or action potential is received by an axon terminal

(make sure to include how contradiction ends in explaination)

A
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19
Q

What prevents continued muscle fiber contraction?

A

destroying ACh will prevent continued contraction

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20
Q

Understand what happens if AChE is inhibited or blocked

A
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21
Q

Understand what happens if there is a lack of ACh receptors

A

it will be harder to receive a contraction or it’s not going to contract at all

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22
Q

Which disease is associated with a lack of ACh receptors?

A

myasthenia gravis

no cure or treatment to help

muscle weakness

double vision

droopiness of eyelids

difficult time swallowing/speaking

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23
Q

mylofilaments

A

myosin and actin

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24
Q

myosin is the

A

thick filament

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25
Q

actin is the

A

thin filament

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26
Q

myosin makes up the

A

A band

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27
Q

actin makes up the

A

I band

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28
Q

types of muscle differ in

A

structure

location

function

means of activation

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29
Q

skeletal and smooth muscle cells are both

A

elongated

30
Q

muscle contractions depend on

A

myofilaments

myosin and actin

31
Q

Skeletal muscle tissue is packaged in skeletal musicles that

A

attach to and cover the bony skeleton

32
Q

skeletal muscle tissues are responsible for our

A

overall motility

33
Q

skeletal muscles contract rapidly but

A

tire easily

34
Q

cardiac muscle tissues are found

A

in the heart

35
Q

sarcolemma

A

is a plasma membrane of a muscle cell

36
Q

sarcoplasm

A
37
Q

cardiac muscle tissues contract

A

fairly steady rate set by the hearts pacemaker

38
Q

smooth muscle tissue is found in

A

the walls of hollow visceral organs

(stomach, bladder, intestines, respiratory)

39
Q

smooth muscle tissues force

A

food and other substances through body canals

40
Q

functional characteristics of muscle tissues

excitability

A
41
Q

functional characteristics of muscle tissues

irrability

A

ability to receive and respond to stimuli

42
Q

functional characteristics of muscle tissues

contractility

A

ability to shorten

43
Q

functional characteristics of muscle tissues

extensibility

A

ability to be extended or stretched

44
Q

functional characteristics of muscle tissues

elascisity

A

ability to recoil

45
Q

skeletal muscle function is responsible for

A

all locomotion

46
Q

cardiac muscle function is responsible for

A

pushing blood through the whole body

47
Q

smooth muscle function is to maintain

A

blood pressure and squeeze things through organs

48
Q

fascicle is

A

a portion of the muscle

49
Q

multiple fasciles make a

A

muscle

50
Q

fascicle is wrapped in

A

perimysium

51
Q

fasicle is made up of

A

muscle fibers

52
Q

a muscle fiber is a

A

cell

53
Q

a muscle cell is surrounded by the

A

endomysium

54
Q

muscle fibers are multi-

A

micleated

55
Q

muscle fibers have

A

stridations

56
Q

muscle fibers are made of

A

myofibril or fibril

57
Q

myofibril

A

is a rod like structure that plays a role in contractions

58
Q

muscle cells and muscle fibers

A

are the same thing

59
Q

sarcomere is the

A

a band and i band

60
Q

sarcomere make up striations

A

sacromere are the smallest

61
Q

sarcomere are the smallest

A

contractile unit

62
Q

thick filaments have

A

heads and tails

63
Q

tails are

A

polywoven

64
Q

heads are

A

two smaller poly

65
Q

two heads are referenced as

A

cross bridges

66
Q

thin filaments are composed of

A

actin

67
Q

tropomyosin and troponin are bound to

A

actin

68
Q

sarcoplasmic reticulum (p 287)

A
69
Q

synaptic cleft seperates

A

axon terminal and sarcoplasm of muscle fiber

70
Q
A

A & P Unit 2 (5 decks)

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