BIO 161 PSU EXAM 5 QUESTIONS AND ANSWERS
A+ GRADED
What is the skeletal system?
A dynamic system of
connective tissue
What is Blood Cell Differentiation (Hematopoiesis)?
Location of bone marrow, the main producer of blood cells
What are the four different bone shapes?
long, short, flat, irregular
What are sesamoid bone?
small bones embedded within tendon where it passes over a joint
What are wormian bones?
extra irregularly shaped bone pieces that occur within a suture in the cranium
What is the endosteum?
thin membrane that lines the medullary cavity in long bones
What is the periosteum?
the tough membrane that covers the outside of the bone
What are the two types of bone marrow?
red marrow and yellow marrow
What are characteristics of red bone marrow?
• Found at epiphysis of long bones & spongy bone
• Site for hematopoiesis (blood cell formation)
What are characteristics of yellow marrow?
• Found within: medullary cavity
• Stores fat
What is the matrix composition?
50% Ground Substance
25% Collagen Fibers
25% Water
How do Spongy and Compact bone differ when regarding space for vessels and
marrow?
- Spongy (trabecular) one has many spaces
- Compact (cortical) bone has very few
What are osteoprogenitor cells?
stem cells that make osteoblasts and osteocytes
What is a osteon?
the structural unit of compact bone
What do osteons contain?
Osteons consist of concentric layers of bone matrix called lamellae, surrounding a
central canal (Haversian canal)
Haversian canals connected by__________?
A+ GRADED
What is the skeletal system?
A dynamic system of
connective tissue
What is Blood Cell Differentiation (Hematopoiesis)?
Location of bone marrow, the main producer of blood cells
What are the four different bone shapes?
long, short, flat, irregular
What are sesamoid bone?
small bones embedded within tendon where it passes over a joint
What are wormian bones?
extra irregularly shaped bone pieces that occur within a suture in the cranium
What is the endosteum?
thin membrane that lines the medullary cavity in long bones
What is the periosteum?
the tough membrane that covers the outside of the bone
What are the two types of bone marrow?
red marrow and yellow marrow
What are characteristics of red bone marrow?
• Found at epiphysis of long bones & spongy bone
• Site for hematopoiesis (blood cell formation)
What are characteristics of yellow marrow?
• Found within: medullary cavity
• Stores fat
What is the matrix composition?
50% Ground Substance
25% Collagen Fibers
25% Water
How do Spongy and Compact bone differ when regarding space for vessels and
marrow?
- Spongy (trabecular) one has many spaces
- Compact (cortical) bone has very few
What are osteoprogenitor cells?
stem cells that make osteoblasts and osteocytes
What is a osteon?
the structural unit of compact bone
What do osteons contain?
Osteons consist of concentric layers of bone matrix called lamellae, surrounding a
central canal (Haversian canal)
Haversian canals connected by__________?
