Exam 3- Functions of Bone Flashcards Preview

Anatomy And Physiology I > Exam 3- Functions of Bone > Flashcards

Flashcards in Exam 3- Functions of Bone Deck (10):
1

Support

Form the framework of the body, contrivute to the shape, alignment, and positioning of the body

2

Protection

enclose delicate organs (ribs, skull)

3

Movement

Bones connected at joints by ligaments, connected to muscled by tendons. Bones and joints act as levers that move when muscles contract (ex. deltoid, humerus)
bone cells can't move, bones are involved with movement muscles

4

Mineral Storage

Major reservoir for Ca, P, and others
works opposite blood to maintain blood mineral homeostasis (Ca++)

5

Hematopoiesis

Blood cell formation is carried out by myeloid tissue (red bone marrow)

6

Blood Calcium Levels

Skeleton has 98% of body's Ca++ reserves
maintains homeostasis of blood ca++ levels
during bone formation osteoblasts remove Ca++ from blood, during break down, osteroclasts release Ca++ into blood

7

Homeostasis of Ca++ concentration essential for:

Bone Formation
Blood Clotting
Nervous Transmission
Muscle Contraction

8

Parathyroid hormone

Produced by parathyroid gland. Primary regulator; Stimulates osteoclasts, increases renal absorption of Ca++. stimulates vit. D synthesis

9

Calcitonin

Secondary Regulator. Produced by thyroid gland, stimulates osteroblasts, inhibits osteoclasts, increases bone regularity.

10

Functions of Bone

Support, protection, movement, mineral storage, hematopoiesis