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BIOS 135 Midterm Exam
- Hematopoiesis refers to the formation of blood cells within the red marrow cavities of
certain bones. (T/F):
Answer True
- Short, irregular, and flat bones all consist of thin plates of spongy bone covered by
compact bone. (T/F):
Answer False
- Bones are classified by whether they are weight bearing or protective in function. (T/F):
Answer False
- The periosteum is a tissue that serves only to protect the bone because it is not supplied
with nerves or blood vessels. (T/F):
Answer False
- Short, irregular, and flat bones have medullary cavities in order to keep the weight of the
bones light. (T/F):
Answer False
- In newborn infants, the medullary cavity and all areas of spongy bone contain red
bone marrow. (T/F):
Answer False
- The structural unit of compact bone (osteon) resembles the growth rings of a tree trunk.
(T/F):
Answer True
- The term osteoid refers to the organic part of the matrix of compact bones without
mineralization. (T/F):
Answer True
- Sixty-five percent of the mass of bone is a compound called hydroxyapatite. (T/F):
Answer True 1 / 2
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10. All bones stop growing by the end of adolescence. (T/F):
Answer False
- An osteon contains osteocytes, lamellae, and a central canal, and is found in compact bone
only. (T/F):
Answer True
12. The trabeculae of spongy bone are oriented toward lines of stress. (T/F): -
Answer True
- The hormone that is primarily involved in the control of bone remodeling is calcitonin.
(T/F):
Answer True
- Each consecutive bone lamella has collagen fibers that wrap in alternating directions. (T/F):
Answer False
- Cartilage has a flexible matrix that can accommodate mitosis of chondro- cytes. (T/F):
Answer True
- The structure of bone tissue suits the function. Which of the following bone tissues is
adapted to support weight and withstand torsion stresses?:
Answer com- pact bone
17. Yellow bone marrow contains a large percentage of .:
Answer Fat
- The cell responsible for secreting the matrix of bone is the ___.
Answer os- teoblast
19. What kind of tissue is the forerunner of long bones in the embryo?:
Answer hyaline cartilage
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