Chapter 1

Question 1

Functions of skeletal muscle

Answer 1

force production for locomotion, breathing, postural support, heat production

Question 2

flexors

Answer 2

decrease joint angle

Question 3

extensors

Answer 3

increase joint angle

Question 4

fiber

Answer 4

muscle cell, long, slender, multinucleated

Question 5

connective tissue layers

Answer 5

epimysium, perimysium, endomysium

Question 6

tendons

Answer 6

tissue connecting muscle to periosteum of bone

Question 7

epimysium

Answer 7

surrounds all the bundles to form the entire muscles

Question 8

perimysium

Answer 8

surrounds several fibers and forms bundles called fasciculi

Question 9

endomysium

Answer 9

wraps around each fiber

Question 10

origin of tendon

Answer 10

more stable bone

Question 11

insertion of tendon

Answer 11

moving bone

Question 12

sacrolemma

Answer 12

muscle cell membrane

Question 13

satelite cells

Answer 13

muscle growth and repair

Question 14

myonuclear domain

Answer 14

cytoplasm surrounding each nucleus

Question 15

what does more nuclei do?

Answer 15

allow for greater protein synthesis, important for adaptations to strength training

Question 16

sacroplasmic reticulum

Answer 16

extensive lattice like network and vesicles

Question 17

SR function

Answer 17

provides structural integrity, storage for calcium, terminal cisternae

Question 18

transverse tubules

Answer 18

extend from sacrolemma to SR

Question 19

Myofibrils

Answer 19

contain contractile proteins

Question 20

sacromere

Answer 20

basic contractile element of skeletal muscle, end to end, Z line to Z line

Question 21

myofibrils

Answer 21

in muscle fiber

Question 22

actin

Answer 22

thin, I band, A band

Question 23

myosin

Answer 23

thick, globular head, A band, H zone

Question 24

function of actin

Answer 24

myosin binding site

Question 25

tropomyosin

Answer 25

covers active site

Question 26

troponin

Answer 26

anchored to actin and moves tropomyosin

Question 27

titin

Answer 27

third myofilamnet, acts as spring, Z-disk to M-band

Question 28

neuromuscular junction

Answer 28

junction between motor neuron and muscle fiber

Question 29

motor unit

Answer 29

motor neuron and all fibers it innervates

Question 30

motor end plate

Answer 30

pocket formed around motor neuron by sacrolemma

Question 31

Ach

Answer 31

released from motor neuron that causes EPP