Skeletal Muscle

Question 1

Tendon

Answer 1

Dense connective tissue;made up of epi, peri, endo all come together and connect

Question 2

Fascia

Answer 2

Dense tough tissue that surrounds the entire muscle; every muscle is surrounded by fascia

Question 3

Epimysium

Answer 3

Under fascia; light delicate connective tissue compartmentalizes the muscle; also surrounds the entire muscle

Question 4

Perimysium

Answer 4

Bundles of muscle fibers are surrounded by this; is also light and delicate connective tissue membrane

Question 5

Fascicle

Answer 5

Bundle of muscle fibers surrounded by a perimysium

Question 6

Endomysium

Answer 6

Each individual muscle fiber has a connective tissue membrane

Question 7

Sarcolemma

Answer 7

Skeletal muscle cell membrane

Question 8

Myofibrils

Answer 8

Small muscle fibers; long chain of sarcomeres
(Mausoleum fibers are made up of many myofibrils)

Question 9

Cytosol

Answer 9

Fluid that’s between the myofibrils

Question 10

Transverse tubule

Answer 10

Extension of sarcolemma
“Run perpendicular to sarcolemma”

Question 11

Sarcoplasmic reticulum

Answer 11

Serves as storage site for intracellular calcium

Question 12

Terminal Cisternae

Answer 12

All the tubes and channels are connected and form little pools; the pools are apart of the sarcoplasmic reticulum

Question 13

What is the triad region?

Answer 13

1 T. Tubule and 2 terminal cisternae

Question 14

Sarcomere

Answer 14

Region of a myofibrils extending from z-line to z-line; smallest functional unit of skeletal muscle (this is also where contraction takes place)

Question 15

Contractile unit

Answer 15

Where contraction takes place

Question 16

M-line

Answer 16

Connecting proteins between to parts of the myosin filament

Question 17

What are the 2 contractile proteins?

Answer 17

-myosin (thick filaments)
-actin (thin filaments)

Question 18

Where is myosin?

Answer 18

In the middle

Question 19

Where is actin?

Answer 19

Extend off the ends of sarcomere; z-line

Question 20

H zone

Answer 20

Portion of a band that doesn’t overlap the thick and thin filament

Question 21

I band

Answer 21

Region of the sarcomere;only thin filament

Question 22

A band

Answer 22

Entire thick filament, over lapping with thin filament

Question 23

Z line

Answer 23

Thin filament extends from z-line; z-line is the boundary