Chapter 10 Test Ii

Front 1

Name the properties of muscles

Back 1

excitability
contactility
elasticity
extensibility

Front 2

When a stimulus from the environment results in electrical nerve impulse that stimulates the muscle cell to contract it is an example of what type of muscle property

Back 2

excitability

Front 3

A muscle fibers ability to return to its original length when the tension of contraction is released is an example of what type of muscle property

Back 3

Elasticity

Front 4

When a muscle can extend in length in response to the contraction of an opposing muscle it is an example of what type of muscle property

Back 4

Extensibility

Front 5

this type of muscle property relates to flexion and extension

Back 5

extensibility

Front 6

this type of muscle cell is long and cylindrical

Back 6

skeletal muscle

Front 7

neurons that stimulate contraction are called?

Back 7

motor neurons

Front 8

This type of muscle cell is multinucleated

Back 8

Skeletal muscle cell

Front 9

This type of muscle cell can be as long as the entire muscle

Back 9

skeletal muscle cell

Front 10

This type of muscle cell is relatively short, wide in the middle, and tapered at the ends. ( fusiform)

Back 10

smooth muscle

Front 11

where are branching cells (Y shaped) located?

Back 11

Cardiac Muscle

Front 12

This type of cardiac cell bifurcates

Back 12

braching cells ( Y shaped)

Front 13

in which muscle type can intercalated discs be found

Back 13

cardiac

Front 14

These structures allow rapid passage of electrical current from one cell to the next during each heart beat.

Back 14

intercalated discs

Front 15

this type of muscle is striated and involuntary

Back 15

cardiac

Front 16

which muscle groups includes sphinters (circular muscle bands)?

Back 16

skeletal muscle tissue

Front 17

Myofibrils are composed of what two contractile proteins.

Back 17

thin filaments of actin
thick filaments of myosin

Front 18

What is the innermost connective tissue layer of a muscle?

Back 18

Endomysium

Front 19

What is Endomyium made of?

Back 19

areolar connective tissue

Front 20

Which type of connective tissue layer covers each muscle fascicle?

Back 20

Perimysium

Front 21

What is perimysium made of?

Back 21

dense irregular connective tissue

Front 22

Which connective tissue layer contains extensive arrays of blood vessels and nerves called neurovascular bundles?

Back 22

The Perimysium

Front 23

which connective layers covers the entire skeletal muscle

Back 23

Epimysium

Front 24

This separates individual muscles

Back 24

deep fascia

Front 25

This binds muscles with similar function

Back 25

deep fascia

Front 26

At the end of a muscle what merges to form a fibrous tendon

Back 26

the connective tissue layers

Front 27

This is a broad flat tendon that attaches muscle to muscle

Back 27

aponeurosis

Front 28

what is the plasma membrane of a skeletal muscle fibers

Back 28

sarcolemma

Front 29

What is the cytoplasm of a skeletal muscle fiber?

Back 29

sarcoplasm

Front 30

What is the smooth ER of a skeletal muscle

Back 30

Sarcoplasmic reticulum

Front 31

Deep invaginations of the sarcolemma that extend into the sarcoplasm

Back 31

T-tubules

Front 32

These are blind sacs at the end of the sarcoplasmic reticulum

Back 32

terminal cisternae

Front 33

these are embryonic skeletal muscle cells with one nucleus

Back 33

myoblasts

Front 34

these have the ability to shorten, which equals muscle contraction and the production of motion

Back 34

myofibrils

Front 35

where are myofibrils located?

Back 35

sarcoplasm

Front 36

Myofibrils are made of what?

Back 36

myofilaments

Front 37

what are the two types of myfilaments?

Back 37

thin - actin
thick - myosin

Front 38

Thin filaments arr comprised of what two strands of molecules twisted around each other?

Back 38

G- actin
F-actin

Front 39

what two regulatory proteins are also part of thin filaments

Back 39

tropomyosin
troponin

Front 40

this protein provides a binding site for calcium ions

Back 40

troponin

Front 41

this type of molecule has a head and elongated tail

Back 41

Myosin ( thick filaments)

Front 42

what do the heads of the myosin form during muscle contraction

Back 42

crossbridges with the thin filaments

Front 43

these are the dark bands that contain the entire myosin molecule and an overlapping portion of actin

Back 43

A bands

Front 44

The light bands that contain thin filaments but not thick filaments

Back 44

I bands

Front 45

this bands contains the protein titin

Back 45

I bands

Front 46

what is the functional contractile unit in a skeletal muscle fiber

Back 46

sacromere

Front 47

What happens to the width of the A band when the muscle contracts

Back 47

it remains constant

Front 48

What happens to the H band during muscle contraction

Back 48

it disappears

Front 49

what three structures of the muscle shorten/ narrow when the muscle contracts

Back 49

Sacromere
H zone
I band

Front 50

what is the motor nervous system responsible for

Back 50

transmitting motor impulses from the CNS to muscles and glands

Front 51

which division of the motor nervous system is involuntary

Back 51

autonomic

Front 52

the region where the motor neuron comes in close proximity to the muscle fiber

Back 52

neuromuscular junction