ch.6 test

Question 1

what are the three basic muscle types

Answer 1

skeletal muscle, cardiac muscle, smooth muscle

Question 2

are elongated muscles

Answer 2

skeletal and smooth

Question 3

contraction and shortening of muscles are due to

Answer 3

the movement of microfilaments

Question 4

prefixes myo and mys refers to

Answer 4

muscle

Question 5

prefixes sacro refers to

Answer 5

flesh

Question 6

attached to bones or, for some facial muscles, to skin

Answer 6

skeletal

Question 7

walls of the heart

Answer 7

cardiac

Question 8

walls of the hallow organs (other than the heart)

Answer 8

smooth

Question 9

the muscle fibers are attached by tendons to bones; are large, cigar-shaped, and multinucleate, also known as straighted muscle because of its obvious stripes, also known as voluntary muscle because it is the only muscle tissue subject to conscious control

Answer 9

Skeletal muscle

Question 10

Skeletal muscle cells are surrounded and bundled by connective tissue

Answer 10

Endomysium, perimysium, epimysium

Question 11

Encloses a single muscle fiber

Answer 11

Endomysium

Question 12

Wraps around a fascicle (bundle) of muscle fibers

Answer 12

Perimysium

Question 13

Covers the entire skeletal muscle

Answer 13

Epimysum

Question 14

On the outside of the epimysium

Answer 14

Fascia

Question 15

Blends into a connective tissue attachment

Answer 15

The epimysium

Question 16

Cordlike structures, mostly collagen fibers, often cross a joint because of their toughness and small like

Answer 16

Tendons

Question 17

Sheetlike structures, attach muscles indirectly to bones, cartilage, or connective tissue coverings

Answer 17

Aponeuroses

Question 18

No striations; involuntary; found mainly in the walls of hallow visceral organs (such as stomach, urinary bladder, respiring passages), spindle shaped fibers that are uninucleate; contractions are slow and sustainable

Answer 18

Smooth muscle

Question 19

Striations; involuntary; found only in the walls of the heart; uninucleate; contracts at a steady rate set by pacemaker

Answer 19

Cardiac muscle

Question 20

Cardiac muscles have branching cells joined by gap junctions called

Answer 20

Intercalated discs

Question 21

What are skeletal muscles three important roles

Answer 21

Maintain posture and body position; stabilize joints; generate heat

Question 22

Specialized plasma membrane

Answer 22

Sarcolemma

Question 23

Long organelles inside muscle cell

Answer 23

Myofibns

Question 24

Gives the muscle it’s striated (banded) appearance

Answer 24

Light (I) bands and dark (A) bands

Question 25

Contains only thin filaments; z disc is a midline interruption

Answer 25

I band

Question 26

Contains the entire length of the thick filaments; H zone is a lighter central area; M line is in center of H zone

Answer 26

A band

Question 27

Contractile unit of a muscle fiber; structural and functional unit of skeletal muscle

Answer 27

Sarcomere

Question 28

Thick filaments

Answer 28

Myosin filaments

Question 29

Thin filaments

Answer 29

Actin filaments

Question 30

Composed mostly of protein myosin