Ossification

Question 1

What happens to be new cartilage

Answer 1

It is continuously benign formed

Question 2

What opens up a medullary cavity/marrow

Answer 2

Enclosed cartilage being digested away

Question 3

Build bones

Answer 3

Osteoblasts

Question 4

What happens to older cartilage during ossification.

Answer 4

It ossifies or becomes bone

Question 5

What happens to the cartilage for it to become bone

Answer 5

Gets covered by a bone matrix (collar) and then it is broken down

Question 6

Fetus has what type of bone

Answer 6

Cartilage bones enclosed by “bony” bones

Question 7

Bones do what until growth stops

Answer 7

Remodeled and lengthened

Question 8

What two factors effect he remodeling of bones

Answer 8

Blood calcium levels and pull of gravity and muscles on skeleton

Question 9

What replaces cartilage with bone

Answer 9

Osteoblasts

Question 10

PTH

Answer 10

Parathyroid hormone

Question 11

What does the PTH do?

Answer 11

Signal to break down bones to get more calcium in blood if needed

Question 12

How does gravity and muscles effect noes

Answer 12

Determines where bone matrix is to be broken down or formed so the skeleton can stay strong

Question 13

Appositional growth

Answer 13

Bones grow in width

Question 14

What is growth controlled by

Answer 14

Hormones and during puberty sex hormones

Question 15

When does bone growth end

Answer 15

Adolescence when epiphyseal plates are converted to bone

Question 16

Where are the two places that are still hyaline cartilage after birth

Answer 16

Articulate cartilages

Epiphyseal plates