Exam 2 SDSU Bio 212 Questions and
Answers
Dense Connective Tissue - CORRECT ANSWERS -fibroblasts = purple
Collagen fibers = the pink
Fibrocartilage - CORRECT ANSWERS -Dots;
Collagen fibers = pink
Chondrocytes within a lacunae = purple
Matrix = all of it
Compact Bone - CORRECT ANSWERS -Osteon = the whole circle
Haversian Canal (central canal) = dark circle in middle
Canaliculi = lines that stick out that work as canals connecting lacunae to the lamallae
Osteocytes within lacunae = small dots around lamellae
Lamellae = the circles surrounding the Haversian Canal
Spongy Bone Histology - CORRECT ANSWERS -Osteoblasts: around the edges of the circles
Osteocytes within lacunae: in the trabeculae
Red Bone Marrow: Distinct; the purple circles
Trabeculae: the pool of purple
Endosteum: the edges where the osteoblasts hangs out.
Intramembranous Ossification Histology - CORRECT ANSWERS --Osteoblasts
-Osteocytes
-Mesenchymal Tissue --> CAN SEE MESENCHYME BY ITSELF IN WHITE SPACE.
-Developing Bone Spicules/Trabeculae --> TRABECULAE is always pool of where the osteocytes
are.
-Endosteum (?)
,Note: VERY Similar to Spongy bone except also asks for mesenchymal tissue which is developing
bone tissue
Endochondral Ossification Histology - CORRECT ANSWERS --Hyaline Cartilage Model (light
purple)
-Hypertrophied Chondrocytes (towards inner edge of cartilage)
-Developing Bone Spicules/trabeculae
-Endosteum
-Periosteum
-Osteoblasts
-Osteocytes
COMBO OF CARTILAGE AND BONE
Skeletal Muscle Histology - CORRECT ANSWERS -LAST ONE;
I band = light (ACTIN)
A band = dark (MYOSIN)
Nuclei = purple
Individual muscle fibers = the whole thing.
Endomysium (Connective tissue surrounding a skeletal muscle cell)
Plasma membrane -> sarclolemma
SARCOLEMMA AND ENDOMYSIUM?
Dense Connective Tissue - CORRECT ANSWERS -fibroblasts = purple
Collagen fibers = the pink
Fibrocartilage - CORRECT ANSWERS -Dots;
Collagen fibers = pink
Chondrocytes within a lacunae = purple
Matrix = all of it
Compact Bone - CORRECT ANSWERS -Osteon = the whole circle
, Haversian Canal (central canal) = dark circle in middle
Canaliculi = lines that stick out that work as canals connecting lacunae to the lamallae
Osteocytes within lacunae = small dots around lamellae
Lamellae = the circles surrounding the Haversian Canal
Spongy Bone Histology - CORRECT ANSWERS -Osteoblasts: around the edges of the circles
Osteocytes within lacunae: in the trabeculae
Red Bone Marrow: Distinct; the purple circles
Trabeculae: the pool of purple
Endosteum: the edges where the osteoblasts hangs out.
Intramembranous Ossification Histology - CORRECT ANSWERS --Osteoblasts
-Osteocytes
-Mesenchymal Tissue --> CAN SEE MESENCHYME BY ITSELF IN WHITE SPACE.
-Developing Bone Spicules/Trabeculae --> TRABECULAE is always pool of where the osteocytes
are.
-Endosteum (?)
Note: VERY Similar to Spongy bone except also asks for mesenchymal tissue which is developing
bone tissue
Endochondral Ossification Histology - CORRECT ANSWERS --Hyaline Cartilage Model (light
purple)
-Hypertrophied Chondrocytes (towards inner edge of cartilage)
-Developing Bone Spicules/trabeculae
-Endosteum
-Periosteum
-Osteoblasts
-Osteocytes
COMBO OF CARTILAGE AND BONE
Answers
Dense Connective Tissue - CORRECT ANSWERS -fibroblasts = purple
Collagen fibers = the pink
Fibrocartilage - CORRECT ANSWERS -Dots;
Collagen fibers = pink
Chondrocytes within a lacunae = purple
Matrix = all of it
Compact Bone - CORRECT ANSWERS -Osteon = the whole circle
Haversian Canal (central canal) = dark circle in middle
Canaliculi = lines that stick out that work as canals connecting lacunae to the lamallae
Osteocytes within lacunae = small dots around lamellae
Lamellae = the circles surrounding the Haversian Canal
Spongy Bone Histology - CORRECT ANSWERS -Osteoblasts: around the edges of the circles
Osteocytes within lacunae: in the trabeculae
Red Bone Marrow: Distinct; the purple circles
Trabeculae: the pool of purple
Endosteum: the edges where the osteoblasts hangs out.
Intramembranous Ossification Histology - CORRECT ANSWERS --Osteoblasts
-Osteocytes
-Mesenchymal Tissue --> CAN SEE MESENCHYME BY ITSELF IN WHITE SPACE.
-Developing Bone Spicules/Trabeculae --> TRABECULAE is always pool of where the osteocytes
are.
-Endosteum (?)
,Note: VERY Similar to Spongy bone except also asks for mesenchymal tissue which is developing
bone tissue
Endochondral Ossification Histology - CORRECT ANSWERS --Hyaline Cartilage Model (light
purple)
-Hypertrophied Chondrocytes (towards inner edge of cartilage)
-Developing Bone Spicules/trabeculae
-Endosteum
-Periosteum
-Osteoblasts
-Osteocytes
COMBO OF CARTILAGE AND BONE
Skeletal Muscle Histology - CORRECT ANSWERS -LAST ONE;
I band = light (ACTIN)
A band = dark (MYOSIN)
Nuclei = purple
Individual muscle fibers = the whole thing.
Endomysium (Connective tissue surrounding a skeletal muscle cell)
Plasma membrane -> sarclolemma
SARCOLEMMA AND ENDOMYSIUM?
Dense Connective Tissue - CORRECT ANSWERS -fibroblasts = purple
Collagen fibers = the pink
Fibrocartilage - CORRECT ANSWERS -Dots;
Collagen fibers = pink
Chondrocytes within a lacunae = purple
Matrix = all of it
Compact Bone - CORRECT ANSWERS -Osteon = the whole circle
, Haversian Canal (central canal) = dark circle in middle
Canaliculi = lines that stick out that work as canals connecting lacunae to the lamallae
Osteocytes within lacunae = small dots around lamellae
Lamellae = the circles surrounding the Haversian Canal
Spongy Bone Histology - CORRECT ANSWERS -Osteoblasts: around the edges of the circles
Osteocytes within lacunae: in the trabeculae
Red Bone Marrow: Distinct; the purple circles
Trabeculae: the pool of purple
Endosteum: the edges where the osteoblasts hangs out.
Intramembranous Ossification Histology - CORRECT ANSWERS --Osteoblasts
-Osteocytes
-Mesenchymal Tissue --> CAN SEE MESENCHYME BY ITSELF IN WHITE SPACE.
-Developing Bone Spicules/Trabeculae --> TRABECULAE is always pool of where the osteocytes
are.
-Endosteum (?)
Note: VERY Similar to Spongy bone except also asks for mesenchymal tissue which is developing
bone tissue
Endochondral Ossification Histology - CORRECT ANSWERS --Hyaline Cartilage Model (light
purple)
-Hypertrophied Chondrocytes (towards inner edge of cartilage)
-Developing Bone Spicules/trabeculae
-Endosteum
-Periosteum
-Osteoblasts
-Osteocytes
COMBO OF CARTILAGE AND BONE
