Importance of Calcium and Phosphorus in Different Life Stages

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What happens when there are increasing levels of testosterone that encourage considerable calcium salt in the body?

Higher bone density

Calcification of the growth point leading to growth stoppage after puberty (correct)

Increased muscle mass

Increased flexibility in the joints

Which type of bone cells are responsible for secreting collagen and forming the organic matrix before calcification?

Osteoblasts (correct)

Osteoclasts

Osteocytes

Chondrocytes

What is the function of osteoclasts in bone tissue?

Erode and resorb previously formed bone (correct)

Hold bones together

Secrete collagen to form the organic matrix

Surround themselves with calcified matrix

How does calcification impact growth points in bones?

Causes closure of the growth points Signup and view all the answers

What effect does aging have on bone density due to increased osteoclast activity?

Bone becomes brittle Signup and view all the answers

Which type of joint allows certain body parts to move in two directions?

Hinge joints Signup and view all the answers

What type of bones are most bones of the upper and lower limbs classified as?

Long bones Signup and view all the answers

Which type of bone is thin and expanded in two dimensions?

Flat bones Signup and view all the answers

What is the function of sesamoid bones in the skeletal system?

Reduce friction or change the course of tendons Signup and view all the answers

Which part of a long bone is located at either extremity?

Epiphysis Signup and view all the answers

Where are axial skeleton bones located in relation to the body?

On the long axis or midline of the body Signup and view all the answers

What is the primary function of flat bones in the skeletal system?

Provide protection to vital organs Signup and view all the answers

What is the study of bones collectively making up the skeleton called?

Osteology Signup and view all the answers

Which type of vessels are NOT present in bones?

Muscular vessels Signup and view all the answers

What gives hardness and rigidity to bones?

Calcium and phosphorus salts Signup and view all the answers

In the formation and maintenance of the skeletal system, which minerals are considered very important?

Calcium and Phosphorus Signup and view all the answers

The Ca:P ratio in bone weight is about 2:1. What does this ratio imply?

There is more calcium than phosphorus in bones. Signup and view all the answers

Which cells are responsible for bone formation and repair?

Osteocytes Signup and view all the answers