Bio 201 Lecture Exam 2 UPDATED ACTUAL Exam Questions and CORRECT Answers

Bio 201 Lecture Exam 2 UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Skeletal System Components - CORRECT ANSWER - Bones
Cartilages
Joints


Functions of the Skeletal System - CORRECT ANSWER - 1. Support
2. Protection
3. Movement
4. Blood formation
5. Mineral reservoir
- Calcium (Ca2+) and phosphorus (phosphate PO4
3-)
6. pH balance
- Storage of bicarbonate from blood


Bone textures - CORRECT ANSWER - 1. Compact bone
- Dense outer layer


2. Spongy (cancellous) bone
- Honeycomb of trabeculae


Features of Long Bones - CORRECT ANSWER - 1. Enlarged ends (epiphyses)
- spongy bone (cancellous) covered with a layer of compact bone


2. Shaft (diaphysis)

, - contains marrow cavity
(medullary cavity) that is lined with endosteum(layer of osteogenic cells)


3. Joint surface covered with articular cartilage (hyaline cartilage)


4. Remainder of bone covered with periosteum
- inner osteogenic layer important
for growth and healing


5. Epiphyseal plate or line depends on age


Features of a Flat Bone - CORRECT ANSWER - 1. External and internal surfaces of flat
bone are composed of compact bone
- Increased protection


2. Middle layer is spongy bone
- No marrow cavity


(Bone as a Tissue) Dynamic Tissue - CORRECT ANSWER - Continually remodels itself



(Bone as a Tissue) Hydroxyapatite - CORRECT ANSWER - Calcium Phosphate



(Bone as a Tissue) Skeletal System makeup? - CORRECT ANSWER - Bone: bone tissue,
marrow, cartilage and periosteum


Cells of Osseous Tissue - CORRECT ANSWER - 1. Osteogenic
cells reside in endosteum, periosteum or central canals
- multiply continuously and differentiate into non-dividing osteoblasts