Muscle Architecture

Question 1

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

Answer 1

Excitable Tissue

Question 2

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

Answer 2

No. dead cells

Stratum Corneum of epidermis

Question 3

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

Answer 3

Proteins

Action/Graded Potential

Question 4

Are all muscle cell types excitable?

Answer 4

Yes

Question 5

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

Answer 5

Skeletal

Question 6

What is the appearance of the histology of skeletal muscle?

Answer 6

Skeletal - over lapping proteins

Question 7

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

Answer 7

Smooth Muscle

Question 8

How is the histology of smooth muscle different?

Answer 8

Not striated. Cells are smaller and spindle shaped.

Question 9

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

Answer 9

Cardiac Muscle

Question 10

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

Answer 10

Excitability

Question 11

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

Answer 11

Contractability

Question 12

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

Answer 12

Push Fluids or gases
Push Blood
Move skeleton

Question 13

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

Answer 13

Extensibility

Question 14

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

Answer 14

Elasticity

Question 15

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

Answer 15

Produce Movement

Question 16

The function that is only applicable to skeletal muscle

Answer 16

Maintain Posture

Question 17

As skeletal muscle maintains posture, it also does this

Answer 17

Stabilizes joints

Question 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

Answer 18

Generate Heat

Question 19

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

Answer 19

Keeps the enzymes of body functioning.

Question 20

Is all skeletal muscle attached to bone?

Answer 20

No, there are a few exceptions (palmaris longus)

Question 21

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

Answer 21

Muscle Cell

Question 22

The name for the plasma membrane of the muscle cell

Answer 22

Sarcolemma

Question 23

Where is the endomysium in relation to the muscle cell?

Answer 23

Just outside the sarcolemma (superficial)

Question 24

The name for the cytoplasm of muscle cells

Answer 24

Sarcoplasm

Question 25

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

Answer 25

Nuclei

Question 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

Answer 26

Mitochondria

Question 27

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

Answer 27

Myoglobin

Question 28

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

Answer 28

Glycosomes

Question 29

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

Answer 29

Sarcoplasmic Reticulum

Question 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

Answer 30

Myfibrils

Question 31

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

Answer 31

Thick Filaments

Question 32

Made up of myosin, multiple bundled together.

Answer 32

Thick Filament

Question 33

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

Answer 33

Myosin Molecule

Question 34

Three proteins of thin filaments

Answer 34

1) Actin 2) Tropomyosin 3) Troponin

Question 35

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

Answer 35

Actin

Question 36

Threadlike protein in thin filaments

Answer 36

Tropomyosin

Question 37

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

Answer 37

Troponin

Question 38

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

Answer 38

Banding Pattern

Question 39

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

Answer 39

A band

Question 40

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

Answer 40

I band

Question 41

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

Answer 41

A band

Question 42

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

Answer 42

I band

Question 43

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

Answer 43

H zone

Question 44

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

Answer 44

M-Line

Question 45

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

Answer 45

Z line (disc)

Question 46

Area between two Z lines

Answer 46

Sarcomere

Question 47

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

Answer 47

Elastic Filaments

Question 48

Name the two elastic filament proteins

Answer 48

Titin | Nebulin

Question 49

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

Answer 49

Titin

Question 50

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

Answer 50

Nebulin

Question 51

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

Answer 51

T-tubules

Question 52

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

Answer 52

Sarcoplasmic Reticulum

Question 53

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

Answer 53

Terminal Cisternae

Question 54

t-tubule + 2 terminal cisternae are referred to as

Answer 54

Triad