Answer: Seven.
- A Seven
- B Five
- C Twelve
- D Thirty
Correct answer: A. Seven
Explanation: Humans, like nearly all mammals, have seven cervical vertebrae.
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.