Question

1. what do osteoblasts do? a) absorb old bone tissue b) build new bone tissue c) provide flexibility 2. what do osteoclasts do? a) build new bone tissue b) absorb old bone tissue c) provide rigidity part e: skeleton divisions 1. how many bones are in the axial skeleton? a) 126 b) 80 c) 206 2. fill in the blank: the axial skeleton includes the ____________. 3. what is the difference between the axial and appendicular skeleton? (short answer) part f: types of bones 1. match the bone type to the correct example: - sternum: __________ (long bone, flat bone, short bone, irregular bone, sesamoid bone) - humerus: __________ (long bone, flat bone, short bone, irregular bone, sesamoid bone) - patella: __________ (long bone, flat bone, short bone, irregular bone, sesamoid bone) part g: synovial joints 1. which type of synovial joint allows for flexion and extension only? a) ball - and - socket joint b) hinge joint c) pivot joint 2. fill in the blank: the wrist and knuckles are examples of ____________ joints.

Explanation:

1. Osteoblasts are cells responsible for bone - building. They secrete bone - matrix components to form new bone tissue.
2. Osteoclasts are cells that break down and absorb old bone tissue, playing a role in bone remodeling.
3. The axial skeleton consists of 80 bones and includes the skull, vertebral column, and thoracic cage.
4. The axial skeleton forms the central axis of the body, while the appendicular skeleton consists of the bones of the limbs and girdles.
5. The sternum is a flat bone, the humerus is a long bone, and the patella is a sesamoid bone.
6. Hinge joints allow for flexion and extension only, like the knee and elbow. The wrist and knuckles are examples of condyloid joints.

Answer:

1. b) Build new bone tissue
2. b) Absorb old bone tissue
3. b) 80
4. The axial skeleton forms the central axis of the body; the appendicular skeleton consists of the bones of the limbs and girdles.
5. Sternum: Flat bone; Humerus: Long bone; Patella: Sesamoid bone
6. b) Hinge joint; The wrist and knuckles are examples of condyloid joints.