Choose the best answer.

1			Which of the following is not a function of bone?
			A)	protection
			B)	blood formation
			C)	electrolyte balance
			D)	thermoregulation
			E)	movement
2			Bone tissue can remove heavy metals and other foreign elements from the blood.
			A)	True
			B)	False
3			Most of the limb bones belong to which shape category?
			A)	long bones
			B)	short bones
			C)	flat bones
			D)	irregular bones
4			Which type of bone cell produces the matrix of the bone?
			A)	osteogenic (osteoprogenitor) cells
			B)	osteoblasts
			C)	osteocytes
			D)	osteoclasts
5			By dry weight, the matrix of bone is approximately one-half organic and one-half inorganic matter.
			A)	True
			B)	False
6			The inorganic matter found in the matrix of osseous tissue is primarily ________ .
			A)	collagen
			B)	hydroxyapatite
			C)	calcium carbonate
			D)	glycosaminoglycans, proteoglycans, and glycoproteins
7			What would bone be like without collagen fibers?
			A)	very resistant to impact
			B)	very brittle
			C)	very bendable
			D)	very soft
8			The basic structural units of compact bone are the trabeculae.
			A)	True
			B)	False
9			The orientation of trabeculae in the bone are randomly arranged.
			A)	True
			B)	False
10			With age, the amount of red bone marrow increases.
			A)	True
			B)	False
11			During endochondral ossification, what type of tissue is used as a model for bone construction?
			A)	mesenchyme
			B)	elastic cartilage
			C)	fibrocartilage
			D)	hyaline cartilage
12			During bone deposition, the lamellae are laid down in the longitudinal channels starting from the center of the channels and moving outward.
			A)	True
			B)	False
13			What is the typical structure of a flat cranial bone?
			A)	compact bone throughout
			B)	spongy bone throughout
			C)	spongy bone on the outside with compact bone in the center
			D)	compact bone on the outside with spongy bone in the center
14			Growth in the width of a bone is called interstitial growth.
			A)	True
			B)	False
15			Adult bones can grow by interstitial growth and appositional growth.
			A)	True
			B)	False
16			Which one of the following does not promote bone growth?
			A)	vitamin D
			B)	calcium
			C)	sex steroids (estrogen and testosterone)
			D)	parathyroid hormone
17			The level of calcium in the bone is regulated carefully.
			A)	True
			B)	False
18			Which one of the following is not an effect of aging on the skeletal system?
			A)	decrease in bone density
			B)	decrease in protein in the bone
			C)	increase in ease of bone fracturing
			D)	increase in the flexibility of the bone
19			Which one of the following does not increase the risk for developing osteoporosis?
			A)	calcium deficiency
			B)	very low body fat in young women
			C)	low bone mass
			D)	moderate weight-bearing exercise