Muscle Tissue (2)

Question 1

Types of muscle tissue

Answer 1

Cardiac, smooth, and skeletal

Question 2

Where is smooth muscle located

Answer 2

Walls of GI tract, blood vessels, etc

Question 3

In smooth muscle, what are the shape of the cells

Answer 3

Short and spindle shaped

Question 4

Nucleus placement in smooth muscle

Answer 4

Centrally placed

Question 5

Do smooth muscle cells have striations

Answer 5

No

Question 6

Smooth muscle activity is regulated by…

Answer 6

Autonomic nervous system

Question 7

Is smooth muscle branched

Answer 7

No, unbranched

Question 8

Function of smooth muscle

Answer 8

Propels substances or objects

Question 9

Forms the myocardium of the heart

Answer 9

Cardiac muscle

Question 10

Tissue is similar to skeletal muscle under microscope

Answer 10

Cardiac muscle

Question 11

Striations in Cardiac muscle are formed by..

Answer 11

Actin and myosin filaments within microfibrils

Question 12

Shorter than skeletal muscle cells

Answer 12

Cardiac muscle

Question 13

Location of the nucleus and features in cardiac muscle

Answer 13

Branched, striated, centrally located nucleus

Question 14

Unique feature or cardiac muscle

Answer 14

Intercalated discs

Question 15

Intercalated discs are found where…

Answer 15

Cardiac muscle cells join one other

Question 16

Promote rapid transmission of impulses through many cardiac muscle cells at once.

Answer 16

Intercalated discs

Question 17

Cardiac muscle cells are voluntary or involuntary

Answer 17

Involuntary, regulated by ANS

Question 18

Function of cardiac muscle

Answer 18

Propels blood into circulation

Question 19

Skeletal muscle is mostly

Answer 19

Voluntary

Question 20

Shape of cells and nucleus in skeletal muscle

Answer 20

Cylindrical cells, often as long as the muscle itself.

Multinucleate

Question 21

Why is skeletal muscle striated

Answer 21

Due to overlapping patterns of protein filaments

Question 22

Cell membrane in skeletal muscle

Answer 22

Sarcolemma

Question 23

Skeletal muscle cells are full of…

Answer 23

Myofibrils, packed with thin and thick filaments

Question 24

Actin

Answer 24

Thin filament

Question 25

Myosin

Answer 25

Thick filament

Question 26

Composed of repeating segments called sacromeres

Answer 26

Myofibrils

Question 27

Ends of sacromere

Answer 27

Z disc or Z line

Question 28

Between two discs, actin and myosin filaments are arranged….

Answer 28

Such that myosin filaments have their heads oriented outwards towards the actin filaments

Question 29

During contraction in skeletal muscle,

Answer 29

Myosin heads contact actin filaments and draw them towards the center of sacromere to shorten it

Question 30

Muscle contraction is the result of…

Answer 30

Contraction of many sacromeres in series.

Question 31

Three types of skeletal muscle connective tissue

Answer 31

Endomysium, perimysium, and epimysium

Question 32

Connective tissue surrounding a single muscle fiber

Answer 32

Endomysium

Question 33

Connective tissue surrounding a musicale fasicle

Answer 33

Perimysium

Question 34

Bundle of skeletal muscle fibers

Answer 34

Fascicles

Question 35

Connective tissue surrounding an entire muscle

Answer 35

Epimysium

Question 36

During contraction do the length of thick and thin filaments change

Answer 36

No

Question 37

Types of muscle contractions

Answer 37

Isometric, eccentric, and concentric

Question 38

Contraction of a muscle without the muscle changing in length

Answer 38

Isometric

Question 39

Holding weight in hand, not moving

Answer 39

Isometric

Question 40

Contraction of muscle while shortening

Answer 40

Concentric

Question 41

Contraction of muscle while it’s lengthening

Answer 41

Eccentric

Question 42

Flexing bicep, lowering weight, squatting

Answer 42

Eccentric

Question 43

Single motor neuron and the muscle fibers it innerverates

Answer 43

Motor unit

Question 44

Large motor unit

Answer 44

Motor neuron and the many muscle fibers it innervates, strong course movement

Question 45

Small motor unit

Answer 45

Motor neuron and the few muscle fibers it innervates (very fine, precise movements)