KNAT Practice Test Question from KNAT Tutor Lesson: Skeletal System
Please see the question below. Scroll down for the correct answer and video explanation.
KNAT Practice Test Answer Explanation
The correct answer is A. Osteoblasts are bone-forming cells found on the bone’s surface. They help form new bone as older bone is broken down through resorption.
Ossification also plays a role in bone remodeling. Mature bone tissue is constantly being broken down through a process called bone resorption. Through ossification, new bone tissue replaces this old bone. There are three types of bone cells:
• Osteocytes: These are bone cells. They produce collagen and other substances that create the extracellular matrix of bone.
• Osteoblasts: These are called bone-forming cells. They are found on the surface of bone and can be stimulated to differentiate into other type of bone cells called osteocytes.
• Osteoclasts: These are called bone-resorbing cells. They are found on the surface of bone. They dissolve the bone.
For a review on the skeletal system, watch the answer explanation video below.
[Source: KNAT Tutor Lesson: Skeletal System]