skeletal muscle anatomy

Question 1

skeletal muscle: location

Answer 1

skeleton

Question 2

skeletal muscle: cell structure

Answer 2

long thin striated

Question 3

skeletal muscle: function

Answer 3

contraction for movement

Question 4

skeletal muscle ; movement

Answer 4

skeletal muscle is voluntary

Question 5

smooth muscle; location

Answer 5

hollow organs, BV walls, eyes, skin, ducts

Question 6

smooth muscle; cell structure

Answer 6

flat single nuceli nonstriated

Question 7

smooth muscle : function

Answer 7

digestion, nutrients , collect by contraction

Question 8

smooth muscle: movement

Answer 8

smooth muscle are involuntary

Question 9

cardiac muscle : location

Answer 9

heart

Question 10

cardiac muscle: cell structure

Answer 10

wide branching

Question 11

cardiac muscle : function

Answer 11

contraction of heart

Question 12

cardiac muscle : movement

Answer 12

cardiac muscle is involuntary

Question 13

epimysium

Answer 13

connective tissue sheath

Question 14

perimysium

Answer 14

connective tissue sheath surrounding fascile

Question 15

fascicle

Answer 15

10-100 muscle fibers (axons) bundled together

Question 16

endomysium

Answer 16

thin layer of ecm surrounding fibers

Question 17

tendon

Answer 17

attach muscle to bone

Question 18

muscle fiber

Answer 18

long thin shaped cells

Question 19

sarcolemma

Answer 19

plasma membrane of muscle fiber

Question 20

sarcoplasm

Answer 20

cytoplasm of muscle fiber

Question 21

transverse tubules

Answer 21

hollow inward extensions of sarcolemma surrounding myofibrils, filled ecf

Question 22

sarcoplasmic reticulum

Answer 22

specialized smooth endoplasmic reticulum of a muscle fiber storing calcium ions

Question 23

terminal cisternae

Answer 23

enlarged regions of sacroplasmic reticulum where it contatcs t tubules

Question 24

triad

Answer 24

a t tubule and 2 adjascent terminal cisternae in fiber

Question 25

myofibril

Answer 25

long, cylinder organelle composed of muscle proteins

Question 26

myofillament

Answer 26

muscle proteins that make up myofibril in fiber

Question 27

sarcomere

Answer 27

basic muscle fiber unit

Question 28

actin

Answer 28

thin filament consisting of many subunits, bind to myosin head to make filament

Question 29

myosin

Answer 29

club shaped protein in fiber, cells are motille

Question 30

troponin

Answer 30

2nd regulatory protein, holds tropomyosin in place

Question 31

tropomyosin

Answer 31

long ropelike regulatory protein, covers active sites

Question 32

titin

Answer 32

thinnest elastin fillament, stabilizes myofibril structure

Question 33

I band

Answer 33

light region, thin, allows light to pass through

Question 34

z line (disc)

Answer 34

dark line in I band, anchor, attachment point

Question 35

a band

Answer 35

darker , block light , appear darker

Question 36

h zone

Answer 36

slightly lighter middle

Question 37

m line

Answer 37

dark line running through middle

Question 38

zone of overlap

Answer 38

overlapping filaments, tension generated during muscle contraction

Question 39

neuromuscular junction

Answer 39

where neuron communicates with fiber

Question 40

axon terminal

Answer 40

knoblike structure at end of axon containing synaptic vessels with neurotransmitters

Question 41

neurotransmitter/ach

Answer 41

chemical messenger produced by neurons communicating with target cells

Question 42

synaptic cleft

Answer 42

small space between axon terminal of presynaptic neuron and target cell

Question 43

motor end plate

Answer 43

contains receptors for ach

Question 44

synaptic vesicle

Answer 44

mebrane enclosed in axon containing transmitters