Exams › NEET › Biology

During muscle contraction in humans the

1. Actin filaments shorten
2. Sarcomere does not shorten
3. A band remain same
4. A, H and I bands shorten

Correct answer: A band remain same

Solution

In muscle contraction, actin and myosin slide past each other without changing their own lengths. The A band corresponds to the length of the thick myosin filaments, so it stays the same while the I band and H zone shorten.

Related NEET Biology questions

• Salivary glands of cockroach open on
• Identify the joints, which are freely movable.
• Select the correct statement regarding the specific disorder of muscular or skeletal system:
• The cervical vertebrae in humans is
• The type of muscles present in our :
• Formation of cartilage bones involves

⚔️ Practice NEET Biology free + battle 1v1 →