Introduction to the skeletal system

Question 1

What prefix is used when referring to bones

Answer 1

os-

Question 2

What are the functions of bone?

Answer 2

support, protection, leverage, storage and blood cell production

Question 3

What happens to bones when the blood calcium falls too low

Answer 3

Calcium is released through osteoclast activity

Question 4

What happens to bones when the blood calcium gets too high

Answer 4

Calcium is returned to bone through osteoblast activity

Question 5

What are the three kinds of bone cell?

Answer 5

Osteoblast, Osteocyte and Osteoclast

Question 6

What does an osteoblast do?

Answer 6

It forms bone

Question 7

What does an osteocyte do?

Answer 7

It maintains bone

Question 8

What does an osteoclast do?

Answer 8

it removes unneeded bone

Question 9

What is the matrix of bone made of? What makes it so hard?

Answer 9

Collagen and Ground substance made of protein and complex polysaccharides. calcium and phosphate in the form of hydroxyapatite crystals

Question 10

What are the main differences between the structures of cancellous bone and compact bone?

Answer 10

Compact - tightly compacted cylinders of bone. Cancellous - randomly arranged spicules of bone.

Question 11

Why does the body need these two different types of bone?

Answer 11

Cancellous bone for lightness and to accommodate blood cell production. Compact for strength and rigidity.