PSIO 420 EXAM ACTUAL EXAM COMPLETE QUESTIONS AND 100% CORRECT DETAILED ANSWERS

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PSIO 201--EXAM 2-- UNIVERSITY OF ARIZONA EXAM 2024-2025 ACTUAL

EXAM COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS


Bone Types

Ans: Long, Short, Flat, Irregular, Sesamoid, Sutural, Pneumatized

Quiz Periosteum

Ans: Covers external surface of bone

Quiz Endosteum

Ans: Lines inner surface of bone, contains osteogenic cells

Quiz Why is bone considered an organ?

Ans: It contains osseous (connective) tissue, blood vessels, nerves, lymphatic
vessels, cartilage, and connective tissue coverings

Quiz Osteogenic Cells

Ans: Stem cells formed from mesenchyme (embryonic connective tissue)

Quiz Osteoblasts

Ans: Build bone

Quiz Osteocytes

Ans: Maintenance of bone

Quiz Osteoclasts

, Ans: Break down bone

Quiz Bone Modeling

Ans: Bone formed by osteoblasts without prior bone resorption

Quiz Bone Remodeling

Ans: Bone resorbed by osteoclasts and then formed by osteoblasts

Quiz Cartilage Tissue

Ans: Chondrocytes; gel-like substance containing proteoglycan, elastic, collagen, or
reticular fibers

Quiz Bone Tissue

Ans: Osteocytes; solid ground substance containing proteoglycans, collagen elastic
fibers, hydroxyapatite

Quiz Collagen

Ans: Provides flexibility & resistance to tension

Quiz Minerals

Ans: Provide firmness (resistance to compression)

Quiz Rickets (Inorganic)

Ans: Calcium deficiency due to lack of vitamin D leads to flexible bones (bowed
legs)

Quiz Scurvy (Organic)

Ans: Vitamin C deficiency impairs collagen synthesis and leads to brittle bones

Quiz Sponge Bone Organization

Ans: Irregular lattice of thin plates called trabeculae; Osteocytes house in lacunae

Quiz Spongy Bone Location

Ans: Epiphyses of long bones; surrounding marrow cavities; flat, short, irregular
bones

Quiz Spongy Bone Functions