The Area of the Sarcomere That is the Light Region

Question

The area of the sarcomere that is the light region between two successive A-bands is the
A)Z line.
B)M line.
C)I band.
D)myofibril.
E)H band.

Accepted Answer

The light region between two successive A-bands is the I band, which contains only thin filaments and is bisected by the Z line. The M line is the middle of the sarcomere and contains the protein myomesin, the H zone is the area within the A-band where only thick filaments are found.