Sarcomere Quiz

1

Z disc

2

M line

3

thick filament/myosin

4

thin filament/actin

6

sarcomere

7

H zone

8

I band

9

A band

1

A band

2

H zone

3

M line

4

titin

5

Z disc

6

what is a myofiber

muscle cell

what are thin filaments made of

actin

what are thick filaments made of

myosin

what do myofibrils do

produce force

what is the basic contractile unit of a muscle fiber

sarcomere

basic force producing structure from one Z band to the next Z band

sarcomere

what is the Z band/ Z disc made of

alpha-actinin

what is contained in the A band region

thick filament (myosin), M-band, H-band, and part of the thin filament (actin)

what is contained in the I band

thin filament (actin) only

what is contained in the H-band

thick filament (myosin) only

_____ is a thin band of proteins in the center of the sarcomere that function to hold thick filaments int he right orientation

M band

_____ proteins bind to actin at regular intervals on the thin filament snf regulated the tropomyosin protein

troponin

______ blocks actin-MHC interaction at rest

tropomyosin

tropomyosin and troponin are found on the ____ filament

thin (actin)

1

thin (actin)

2

thick (myosin)

3

troponin

4

actin

5

tropomyosin

what is the MHC

myosin heavy chain

_____ breaks down ATP and binds to actin protein to generate force

myosin heavy chain (MHC)

_____ attatches M line to Z disc

titin

1

I band

2

A band

3

M line

4

Z disc

5

thin filament (actin)

6

thick filament (myosin)

7

titin

8

sarcomere