The ..... zone of a sarcomere contains no actin filaments while the skeletal muscle is at rest

MUSCLE CONTRACTION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

The ____ zone of a sarcomere contains no actin filaments while the skeletal muscle is at rest

A	H
B	Z
C	Synaptic Cleft
D	Sarcomere

Explanation:

Detailed explanation-1: -H-band is the zone of the thick filaments that has no actin. Within the H-zone is a thin M-line (from the German “mittel” meaning middle), appears in the middle of the sarcomere formed of cross-connecting elements of the cytoskeleton.

Detailed explanation-2: -Each sarcomere consists of a central A-band (thick filaments) and two halves of the I-band (thin filaments). The I-band from two adjacent sarcomeres meets at the Z-line. The central portion of the A-band is the M-line, which does not contain actin.

Detailed explanation-3: -The I bands contain only thin (actin) filaments, whereas the A bands contain thick (myosin) filaments. The myosin and actin filaments overlap in peripheral regions of the A band, whereas a middle region (called the H zone) contains only myosin.

Detailed explanation-4: -The H-zone contains only thick filaments. The A-band contains both thick and thin filaments and is the center of the sarcomere that spans the H zone.

There is 1 question to complete.

MUSCLE PHYSIOLOGY

PHYSIOLOGY

MUSCLE CONTRACTION