Anatomy of skeletal muscle

Question 1

Most of the muscle in the body

Answer 1

skeletal muscle

Question 2

shapes the body and give you the ability to move

Answer 2

skeletal muscle

Question 3

What muscles move material w/i the body

Answer 3

smooth and cardiac

Question 4

skeletal muscle is also known as what

Answer 4

voluntary muscle because it can be controlled

striated muscle because it appears to be striped

Question 5

skeletal muscle is made up of relatively large, long cylindrical cells called; elongated multinucleate cell

Answer 5

muscle fibers

Question 6

long, rod-shaped organelles that nearly fill the sarcoplasm; contractile; composed of sarcomeres

Answer 6

myofibrils

Question 7

what gives muscle fiber its striped appearance

Answer 7

alternating light and dark bands along myofibrils

Question 8

small threadlike structures that make up myofibrils

Answer 8

myofilaments

Question 9

myofilaments are composed largely of two contractile proteins. what are they?

Answer 9

actin and myosin

Question 10

contractile units of muscle; composed of myofilaments

Answer 10

sarcomeres

Question 11

where do sarcomeres extend?

Answer 11

from the middle of one I band (Z disc) to middle of next along length of myofibril

Question 12

skeletal muscles fibers contain two sets of intracellular tubules that help regulate muscle contraction

Answer 12

sarcoplasmic reticulum

T tubules

Question 13

Elaborate smooth endoplasmic reticulum

Answer 13

sarcoplasmic reticulum

Question 14

discrete bundle of muscle cells, segregated from the rest of the muscle by a connective tissue sheath

Answer 14

fascicle

Question 15

At each A band I band junctions, the sarcolemma of the muscle cell protrudes (indents) deep into the cell interior, forming an elongated tube

Answer 15

T tubule (transverse)

Question 16

Regions where the SR terminal cisterns border a T tubule on each side

Answer 16

triads

Question 17

Each muscle fiber is enclosed in a delicate, areolar connective tissue sheath

Answer 17

endomysium

Question 18

sheathed muscle fibers wrapped by a collagenic membrane

Answer 18

perimysium

Question 19

Perimysium forms a bundle of muscle called

Answer 19

fascicle

Question 20

Fascicles bound together by a much coarser overcoat of dense irregular connective tissue, which sheathes the entire muscle

Answer 20

epimysium

Question 21

Epimysium blend into strong cordlike what

Answer 21

tendons

Question 22

Epimysium blend into strong sheetlike what, which attaches muscles to each other or indirectly to bones

Answer 22

aponeuroses

Question 23

a muscle’s more movable attachment

Answer 23

insertion

Question 24

fixed or immovable attachment

Answer 24

origin

Question 25

Provides durability and conserve space in skeletal muscles

Answer 25

tendon