Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

mt 13 lec > muscle tissue > Flashcards

muscle tissue Flashcards

1
Q

study of the structure, arrangement, and
action of muscles

A

MYOLOGY

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Excitability:
capacity to generate..

A

electrical impulses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Contractility:

capacity to …..

A

shorten in length

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

FUNCTIONS OF THE MUSCULAR SYSTEM

A

voluntary movement
maintenance of body posture
stabilize joints
generate heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

attached to bones via tendons

A

Skeletal Muscle Tissues

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Skeletal Muscle Tissues

shape:
nuclei:
striations:
control:

A

elongated cell
multiple peripheral nuclei
visible
voluntary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

located in the heart

A

Cardiac Muscle Tissues

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Cardiac Muscle Tissue

shape:
nuclei:
striations:
control:

A

breaching cell
single central nuclei
visible
involuntary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

present throughout the gastrointestinal,
reproductive, urinary, vascular, and respiratory
systems

A

smooth muscle tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Smooth Muscle Tissue

shape:
nuclei:
striations:
control:

A

spindle-shaped cell
single central nuclei
lack visible striations.
involuntary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

GENERAL CHARACTERISTICS OF SKELETAL
MUSCLE FIBERS

A

multinucleated
striations
numerous mitochondria
transverse tubules
sarcoplasmic reticulum
myofibrils within the cytoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

acts like a circulatory system in the cell

A

sarcoplasmic reticulum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

bundle of protein filaments

A

myofibrils within the cytoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

called “sarcoplasmic reticulum” in muscle cells

A

endoplasmic reticulum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

acts like the circulatory system of the cell

A

sarcoplasmic reticulum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

It is named “sarcoplasmic reticulum” because of
……………… attached to it
and it is found only on muscle cells.

A

lateral sacs or terminal cisterns

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

the region between the two Z-lines

A

Sarcomere Units

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

bundle of muscle proteins

A

myofibril

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

complex organelle composed of
bundles of myofilaments

A

myofibril

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

the distance between two z-lines

A

sarcomere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

When you flex your muscles, z-line …. each other

A

go towards (decreasing
sarcomere)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

When you stretch your muscles z-line will

A

separate (thus, increasing
sarcomere)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

muscle proteins

A

Myofilament:

24
Q

proteins

A

filament

25
Q

the chemical bond in
muscles

A

“actinomyosin bond”

26
Q

high powered molecule

A

ATP

27
Q

light areas for one protein and dark areas
whenever they ……

A

converge

28
Q

light areas for …….. and dark areas
whenever they converge

A

one protein

29
Q

in the …… they could only see light and dark
bands

A

1940’s

30
Q
  • dark band (overlapping actin
    and myosin
A

A band

31
Q

light band (purely actin)

A

I band

32
Q

Types of Protein Filaments

A

Actin (thin) Myofilaments
& Myosin (thick) Myofilaments

33
Q

attached to the z-lines and extend inwards and
no attachments

A

Actin (thin) Myofilaments

34
Q

thicker proteins and have little projections on
them

A

Myosin (thick) Myofilaments

35
Q

THE SLIDING FILAMENT THEORY OF MUSCLE
CONTRACTION BY:

A

Andrew F. Huxley’s Theory (1950s - 1960s)

36
Q

THE SLIDING FILAMENT THEORY OF MUSCLE
CONTRACTION

A

● Myosin cross-bridges pull on thin filaments.
● Thin filaments slide inward
● Z lines come toward each other
● Sarcomeres shorten
● The muscle fibre shortens
● The muscle shortens

37
Q

also known as Muscle cell membrane

A

sarcolemma

38
Q

forms a deep
vertical tube that extends inward deep into the muscle

A

sarcolemma

39
Q

you call this T-tubule

A

sarcolemmal invagination

40
Q

There is always fluid surrounding a cell and …… inside
a cell is fluid

A

80%

41
Q

There are ____ skeletal muscles in the body that compromise about ____ of body weight

A

650 and 40%

42
Q

The fluid outside of muscle cells is surrounded with
______ as well as into T-tubules

A

sodium ions

43
Q

these are the only cells
where sodium ions can into

A

Muscle and Nerve Cells

44
Q

______ is the coupling ion

A

calcium

45
Q

OUPLING REACTION IN THE MUSCLE CELL

A

(1) Na+ flow into the muscle cell Action Potential (AP) =
electrical current (Excitation)
(2) AP causes the release of Ca+ from the lateral sacs
(coupling)
(3) the Ca+2 causes the myosin cross-bridges to start
pushing the actin myofilaments inward (“Contraction”) or
shortening

46
Q

Once sodium gets into the cell, it will start __________

A

electric current

47
Q

_______ will start to flow out of the muscle
sac

A

. Calcium ions

48
Q

Calcium activates the _________ or the feet
of the men

A

myosin bridges

49
Q

Action Potential:

A

excitation

50
Q
  1. Brief Maximal-Type Training
A

power - hypertrophy growth

51
Q

power - hypertrophy growth example

A

i. weight lifting
ii. sprinting
iii. jumping

52
Q

b. muscle fiber characteristics of power - hypertrophy growth example (LaFaHiLo)

A

i. large diameter muscle fibers
ii. fast rate of contraction
iii. high power development
iv. low myoglobin content
● minimal storage of
oxygen within muscle
fibers
● “white” coloration of
muscle fibers

53
Q

Sustained, Sub-maximal Type Training

A

endurance (aerobics) - prolonged exercise

54
Q

prolonged exercise
c. examples:

A

i. long-distance running
ii. swimming
iii. cycling

55
Q

d. muscle fiber characteristics
of prolonged exercise

A

i. small diameter muscle fibers
● slow rate of
contraction
● high endurance
ii. high myoglobin content
● permits storage

56
Q

hyper -

A

increase

57
Q

trophy

A

growth

mt 13 lec (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions