Answer: 206.
- A 206
- B 186
- C 256
- D 100
Correct answer: A. 206
Explanation: An adult human body has 206 bones. A newborn has about 270-300 bones; many fuse during childhood and adolescence, resulting in 206 by adulthood.
A sarcomere (Z line to Z line): during contraction the I band and H zone shorten as thin filaments slide over thick, while the A band stays the same length. Image: SlothMcCarty, CC BY-SA 3.0, via Wikimedia Commons.
Concept context
Types of movement, muscle contraction, skeletal system, joints, and disorders. Important for Class 11 and NEET.