MICROANATOMY

MUSCLE NERVE CARTILAGE BONE

SMOOTH MUSCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following marks the end of a sarcomere?
A
H zone
B
Z disc
C
M line
D
A band
Explanation: 

Detailed explanation-1: -The actin filaments are attached to Z discs, each of which marks the end of a sarcomere. The sliding of the filaments pulls the Z discs of a sarcomere closer together, thus shortening the sarcomere.

Detailed explanation-2: -Z-discs can be defined as plate-like structures in sarcomeres to which the plus ends of actin filaments are localized, or they can be defined as the centre of the I-band.

There is 1 question to complete.