Sarcomere

Question 1

Z-lines (the borders of a sarcomere)

Answer 1

• Z for Zwischenschieben or “Sandwich” in German (because Z-lines are sandwiched between I-bands)

Question 2

M-line (the middle part of the sarcomere)

Answer 2

• M-line (the middle part of the sarcomere)

Question 3

H-Band (the part of the sarcomere made up only of thick filaments, with no thin filaments interspersed)

Answer 3

• H for Heller or “Brighter” in German (due to their lighter appearance under polarizing microscope)

Question 4

I-Band (part of the sarcomere containing purely thin filaments, with no thick filaments interspersed)

Answer 4

• I for “Isotrophic” band

Question 5

A-Band (entire length of the thick filament)

Answer 5

• A for “Anisotrophic” Band