Please answer all questions

1		Compact bone is composed of tubular units called _______.
			A)	cartilage
			B)	matrix fibers
			C)	osteons
			D)	calcium phosphate units
2		The spaces in spongy bones are often filled with red bone marrow, which produces ________ cells.
			A)	bone
			B)	liver
			C)	cartilage
			D)	blood
3		Cartilage that is firm but somewhat flexible, contains abundant collagen, and is found at the ends of long bones is _____________.
			A)	hyaline cartilage
			B)	fibrocartilage
			C)	elastic cartilage
			D)	ligamental cartilage
4		The ___________ of a long bone is/are made mostly of spongy bone containing red bone marrow.
			A)	diaphysis
			B)	epiphyses
			C)	periosteum
			D)	endosteum
5		Osteoprogenitor cells give rise to _____.
			A)	osteoblasts
			B)	osteocytes
			C)	osteoclasts
6		The function(s) of an osteoclast is (are) _______.
			A)	breakdown of bone
			B)	deposition of calcium in the blood
			C)	both A and B
7		The rate of bone growth is controlled by _______.
			A)	growth and sex hormones
			B)	number of mature osteocytes
			C)	osteoprogenitor cells
			D)	All of these are correct.
8		Bones formed by intramembranous ossification are ___________.
			A)	skull bones
			B)	long bones
			C)	round bones
			D)	All of these are correct.
9		Most of the bones of the skeleton are ________ during prenatal development.
			A)	solid
			B)	cartilaginous
			C)	not present
			D)	compact
10		The thickness of bones is affected by _______.
			A)	physical use
			B)	hormone balance
			C)	calcium in the diet
			D)	all of the above
11		A(n) _____ fracture occurs if the bone is broken all the way through.
			A)	incomplete
			B)	partial
			C)	complete
			D)	semi
12		The skeleton _______.
			A)	permits flexible movement
			B)	supports and protects the body
			C)	produces blood cells and stores inorganic salts
			D)	All of these are correct.
13		The axial skeleton consists of ________.
			A)	the skull
			B)	the vertebral column
			C)	the hyoid bone and rib cage
			D)	all of the above
14		In newborns, certain bones are not completely formed and instead are joined by membranous regions called ________.
			A)	ligaments
			B)	cavities
			C)	fontanels
			D)	sphenoids
15		Normally, the vertebral column has ________ curvatures.
			A)	one
			B)	two
			C)	three
			D)	four
16		________ is a term that refers to either finger or toe bones.
			A)	Processes
			B)	Plates
			C)	Sphenoids
			D)	Phalanges
17		The technical name for the hipbones is the ________ bones.
			A)	ilium
			B)	appendicular
			C)	coxal
			D)	sacral
18		The _________ bone of the leg is the longest and strongest of the body.
			A)	tibia
			B)	fibula
			C)	humerus
			D)	femur
19		Most joints are freely movable, or ________, joints.
			A)	flexible
			B)	synovial
			C)	pelvic
			D)	nonrotational
20		The knee has crescent-shaped pieces of cartilage between the bones called ________.
			A)	phalanges
			B)	carpals
			C)	tarsals
			D)	menisci
21		The more movable joints are the ________.
			A)	hinge joints
			B)	ball-and-socket joints
22		Rheumatoid arthritis is caused by _______.
			A)	a bacteria
			B)	a virus
			C)	a reaction to an immunization
			D)	an autoimmune reaction