Which muscle is commonly known as the chest muscle?

• A. Deltoid
• B. Pectoralis
• C. Abdominals
• D. Quadriceps

Answer: (B)

This question tests your knowledge of which muscle sits on the chest and is commonly referred to as the chest muscle. The muscle you’re looking for is the pectoralis major, the large muscle that covers the upper front of the chest and is responsible for moving the arm forward and pushing actions like a press or push-up. The other options are in different areas: the deltoid is the shoulder muscle that lifts the arm, the abdominals are the core muscles at the front of the abdomen, and the quadriceps are the big muscles at the front of the thigh that extend the knee. So, the chest muscle is the pectoralis major.