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Flashcards in Muscle Architecture Deck (54):
1

Cells of these types of tissues have plasma membrane that can alter electrical potential from the normal resting potential

Excitable Tissue

2

Do all cells in body have RMP? If not, which ones don't?

No. dead cells

Stratum Corneum of epidermis

3

Altering the RMP is done by _____ in the plasma membrane to create _______

Proteins

Action/Graded Potential

4

Are all muscle cell types excitable?

Yes

5

Muscle attached to skeleton (mostly) longest muscle cell type, and are under voluntary control.

Skeletal

6

What is the appearance of the histology of skeletal muscle?

Skeletal - over lapping proteins

7

Muscle that is excitable, can conduct graded and action potentials, found in digestive tract, blood vessels, reproductive and respiratory systems

Smooth Muscle

8

How is the histology of smooth muscle different?

Not striated. Cells are smaller and spindle shaped.

9

Muscle found only in the heart. Striated, but with branching fibers. Intercalated disks appear between fibers that are actually gap junctions

Cardiac Muscle

10

Characteristic of Muscle that means it can conduct action potential in repsonse to a stimulus

Excitability

11

Characteristic of muscle tissue meaning it can shorten and lengthen to generate a force, they push different things

Contractability

12

Function of Smooth muscle
Function of Carciac Muscle
Function of skeletal muscle

Push Fluids or gases
Push Blood
Move skeleton

13

Characteristic of muscle tissue meaning it can be stretched beyond resisting length when it is relaxed, may or may not be functional

Extensibility

14

Characteristic of muscle tissue meaning that it after stretching it will resume its original length

Elasticity

15

Function of muscle done to skeletal structure, blood, or a substance encircled by the organ (i.e. food)

Produce Movement

16

The function that is only applicable to skeletal muscle

Maintain Posture

17

As skeletal muscle maintains posture, it also does this

Stabilizes joints

18

Function of muscle tissue , not all potential energy from ATP is converted to kinetic energy for work, some released as a different type of energy

Generate Heat

19

Why is the release of energy as heat a good thing (as long as it's not too much)?

Keeps the enzymes of body functioning.

20

Is all skeletal muscle attached to bone?

No, there are a few exceptions (palmaris longus)

21

Elongated cell known as a fiber (long and thin). Surrounded by plasma membrane and contains cytoplasm and organelles

Muscle Cell

22

The name for the plasma membrane of the muscle cell

Sarcolemma

23

Where is the endomysium in relation to the muscle cell?

Just outside the sarcolemma (superficial)

24

The name for the cytoplasm of muscle cells

Sarcoplasm

25

These type of organelles in the muscle cell are unique because there are multiple of them and they are peripherial

Nuclei

26

These type of organelles in muscle cells are unique because there are numerous amounts of them (not the nuclei), makes sense because muscle cells are involved in energy production and skeletal muscle uses a lot of energy

Mitochondria

27

Protein of muscle cells that stores extra oxygen, which is necessary for production of ATP

Myoglobin

28

Inclusions (aka storage granules) that store additional glycogen (fuel)

Glycosomes

29

The modified endoplasmic reticulum in the muscle cell, it is surround the myofibrils

Sarcoplasmic Reticulum

30

These structures are contractile organelle that are rod like and run parallel to the length of the cell and take up 80% of the volume of skeletal muscle cell

Myfibrils

31

Myofilaments that run entire length of entire fibril, and therefore run length of entire fiber

Thick Filaments

32

Made up of myosin, multiple bundled together.

Thick Filament

33

These molecules have a long rope like tail and two heads (kiiind of looks like sperm)

Myosin Molecule

34

Three proteins of thin filaments

1) Actin
2) Tropomyosin
3) Troponin

35

A series of beads strung together, a globular protein strung to make a string in thin filaments

Actin

36

Threadlike protein in thin filaments

Tropomyosin

37

Protein of thin filaments that is a cluster of multiple proteins joined together to form a complex

Troponin

38

Thin and think filaments overlap specific to each myofibril, because of this we see

Banding Pattern

39

The dark band we can see in muscle tissue under the microscope

A band

40

The light band we can see in muscle tissue under the microscope

I band

41

This band is the length of the thick filament in the muscle cell with some thin filament overlap

A band

42

This band is the length of the think filament where there is no thick filament overlap

I band

43

Area with no thin filament in the A band, just a little lighter than the rest of A band

H zone

44

Line that bisects the H zone with end to end attachments of the thick filaments

M-Line

45

Bisects the I band where end to end attachments of thin filaments occur

Z line (disc)

46

Area between two Z lines

Sarcomere

47

Filaments in muscle cell that do not participate in contraction. They are supportive structural proteins that help provide integrity to sarcomere and myofibril

Elastic Filaments

48

Name the two elastic filament proteins

Titin
Nebulin

49

Elastic filament located between z line and the thick filament. Provides recoil ability to the cell

Titin

50

Elastic filament that runs along the thin filament within it, forms the core of the thin filament

Nebulin

51

Intracellular tubules that extend from the plasma membrane and wrap around each of the myofibrils along with sarcoplasmic reticulum

T-tubules

52

This intracellular tubule expands as it comes close to t -tubules, looks like a cistern not a network

Sarcoplasmic Reticulum

53

The expanded regions of the sarcoplasmic reticulum on either side of t-tubule are called

Terminal Cisternae

54

t-tubule + 2 terminal cisternae are referred to as

Triad