Mascular

Question 1

Types of Muscle Tissue

Answer 1

1. Skeletal muscle
2. Cardiac muscle
3. Smooth muscle

Question 2

elongated muscle cells eg. Skeletal and smooth muscle cells

Answer 2

Muscle fibers

Question 3

(prefix) both are word
roots meaning “muscle”

Answer 3

Myo or mys

Question 4

meaning flesh

Answer 4

Sarco

Question 5

attach to and cover the bony skeleton.

Answer 5

Skeletal Muscle

Question 6

the longest muscle cells and have obvious stripes called striations

Answer 6

Skeletal Muscle

Question 7

A voluntary muscle because it is subject to conscious control.

Answer 7

Skeletal Muscle

Question 8

responsible for overall body mobility

Answer 8

Skeletal Muscle

Question 9

tires easily and must rest after short periods of activity.

Answer 9

Skeletal Muscle

Question 10

occurs only in the heart

Answer 10

Cardiac Muscle

Question 11

cardiac muscle cells are striated

Answer 11

Cardiac Muscle

Question 12

involuntary muscle

Answer 12

Cardiac Muscle

Question 13

contracts at a fairly steady rate set by the heart’s pacemaker

Answer 13

Cardiac Muscle

Question 14

consists of elongated cells

Answer 14

Smooth Muscle

Question 14

found in the walls of hollow visceral
organs, such as the stomach, urinary
bladder, and respiratory passages

Answer 14

Smooth Muscle

Question 15

has no striations

Answer 15

Smooth Muscle

Question 16

involuntary muscle

Answer 16

Smooth Muscle

Question 17

capacity of muscle to respond to a stimulus

Answer 17

Excitability

Question 18

ability of a muscle to shorten and generate pulling force

Answer 18

Contractility

Question 19

muscle can be stretched back to its original length

Answer 19

Extensibility

Question 20

ability of muscle to recoil to original resting length after stretched

Answer 20

Elasticity

Question 21

Muscle Functions

Answer 21

• Body movement (Locomotion)
• Maintenance of posture
• Respiration
  – Diaphragm and intercostal contractions
• Communication (Verbal and Facial)
• Constriction of organs and vessels
  – Peristalsis of intestinal tract
  – Vasoconstriction of b.v. and other structures (pupils)
• Heart beat
• Production of body heat (Thermogenesis)

Question 22

stimulate muscle fibers to contract
neuron axons branch so that each muscle fiber (muscle cell) is innervated form a neuromuscular junction (= myoneural junction)

Answer 22

Motor neurons

Question 23

Dense regular c.t. surrounding entire muscle
–Separates muscle from surrounding tissues and organs
–Connected to the deep fascia

Answer 23

Epimysium

Question 24

Collagen and elastic fibers surrounding a group of muscle fibers
called a fascicle
–Contains b.v and nerves

Answer 24

Perimysium

Question 25

Loose connective tissue that surrounds individual muscle fibers
–Also contains b.v., nerves, and satellite cells (embryonic stem cells function in repair of muscle tissue

Answer 25

Endomysium

Question 26

consists of a hundreds to thousands of cell muscle, plus connective tissue wrappings, blood vessels, and nerve fibers.
-covered externally by the epimysium

Answer 26

muscle(organ)

Question 27

discrete bundle of muscle cells, segregated from the rest of the muscle by a connective tissue sheath.
-surrounded by perimysium.

Answer 27

fascicle(a portion of the muscle)

Question 28

is an elongated multinucleate cell; it has banded (striated) appearance.
-surrounded by endomysium.

Answer 28

muscle fiber(cell)

Question 29

3 layers of Connective Tissue Sheaths

Answer 29

• Epimysium
• Perimysium
• Endomysium

Question 30

Skeletal muscles span joints and attach to bones (or
other structures) in at least two places called?

Answer 30

insertion and origin

Question 31

the movable bone when a muscle contracts

Answer 31

insertion

Question 32

immovable or less movable bone were the
movable bone moves towards

Answer 32

origin

Question 33

it is a cell membrane that surrounds the sarcoplasm, it contains many of the same organelles seen in other cells, it is also an abundance of the oxygen-binding protein myoglobin, and Punctuated by openings called the transverse tubules (T-tubules)

Answer 33

Sarcolemma

Question 34

it is the cytoplasm of fiber

Answer 34

sarcoplasm

Question 35

cylindrical structures within muscle fiber, and are bundles of protein filaments (=myofilaments)

Answer 35

Myofibrils

Question 36

Two types of myofilaments

Answer 36

1. Actin filaments
2. Myosin filaments

Question 37

it is a thin filaments

Answer 37

Actin filaments

Question 38

it is a thick filaments

Answer 38

Myosin filaments

Question 39

are rodlike contractile elements that occupy most of the muscle cell volume. composed of sarcomeres arrange end to end, they appear bonded, and bands of adjacent are aligned.

Answer 39

myofibrils

Question 40

contractile unit, composed of myofilaments made up of contractile proteins.

Answer 40

sacromere

Question 41

types of myofilaments that contain bundled myosin molecules

Answer 41

thick filaments (myosin filaments)

Question 42

types of myofilaments that contain actin molecules

Answer 42

thin filaments (actin filaments)