Question

1. The primary function of a fossa is to provide a passageway for nerves or blood vessels.

True
False

2. Yellow marrow might typically found in adult: (select all correct answers)

Humerus
Sternum
Femur
Clavicle

3. Haversian blood vessels bring blood to a particular osteon.

True
False

4. Osteoblasts are designed to:

resorb or break down bone to release calcium
lay down new bone
keep the structure of established bone stable

5. Fibrocartilaginous callus formation is mainly performed by:

chondroblasts
osteoblasts
fibroblasts

Answer 1

ANSWER :

1. The foramen ia an opening specially referred to a bone and primarily functions to allow nerves, blood vessels through them from one part to another in the body. Hence the corresponding statement is false.

2. Yellow bone marrow composed of adipose and lymphatic tissues and only found in shaft (medullary cavity) of the long bones such as humerus, femur (thigh bone) etc. Hence options (1) and (3) are correct answers.

3. Haversian canal or blood vessels composed of many small blood vessels that supply blood to connected osteocytes (bone cells). Hence the corresponding statement is false.

4. Osteoblasts are known as bone forming cells because they are capable of synthesize osteoid matrix, which composed of proteins and minerals to form the new bone tissue. Hence option (2) is the correct answer.

5. Fibrocartilagenous callus formation is mainly perfomed via fibroblasts, during this process fibroblasts from periosteum collected to fractured site and produce collagen fibres. Hence option (3) is the correct answer.