Question

6 multiple choice 1 point
the muscle that divides the ventral body cavity into the thoracic and abdominopelvic cavities is the _.
psoas major
diaphragm
internal oblique
transversus abdominis
7 multiple choice 1 point
the most powerful muscle in the body is the _.
gluteus maximus
quadriceps femoris
gastrocnemius
rectus abdominis

Explanation:

• Question 6: The diaphragm is a dome - shaped muscle that separates the thoracic cavity (containing the heart and lungs) from the abdominopelvic cavity (containing digestive, urinary, and reproductive organs). The psoas major is involved in hip flexion, the internal oblique is an abdominal muscle for trunk rotation and lateral flexion, and the transversus abdominis is for abdominal wall support and compression.
• Question 7: The quadriceps femoris (a group of four muscles in the thigh) is considered the most powerful muscle in the body as it is responsible for knee extension, which is a movement that requires significant force for activities like walking, running, and jumping. The gluteus maximus is large but not as powerful in terms of overall force generation for common movements as the quadriceps. The gastrocnemius is a calf muscle for plantar - flexion, and the rectus abdominis is for trunk flexion.

Answer:

1. B. Diaphragm
2. B. Quadriceps femoris