Histology Flashcards
Where are nuclei located in muscle fibres?
At the periphery, just under the cell membrane (sarcolemma)
What are muscle fibres grouped into?
Fascicles
What is the connective tissue that surrounds the whole muscle called?
Epimysium
What is the connective tissue around a single fascicle called?
Perimysium
What is the connective tissue around a single muscle fibre called?
Endomysium
Sarcomeres are placed end-to-end in their thousands to form what?
Myofibril
List the 3 types of skeletal muscle fibre
Type I
Type IIA
Type IIB
Describe type I skeletal muscle fibre
Slow to contract
Abundant mitochondria; resist fatigue
Less force
Red fibres
Describe type IIA skeletal muscle fibre
Relatively fast contracting compared to type I
Uncommon
Describe type IIB skeletal muscle fibre
Rapid contraction
Few mitochondria; anaerobic metabolism
Great force
White fibres
What are the cells found within cartilage called? Where in the cartilage are they found?
Chondrocytes
Lacuna
List the 3 main types of cartilage
Hyaline
Elastic
Fibrocartilage
Bone is 65% _____, 23% _____ and 10% ______
Mineral, collagen, water
What are the cells within bone called?
Osteocytes
What is the composition of bone?
Collagen
Non-collagenous proteins
Water
Bioapitative (form of Ca PO4)
What types of bone forms the outer shell and epiphysis of bones, respectively?
Cortical bone
Trabecular bone - fine meshwork, spongy
What are the two types of canals found within bone? What are they surrounded by?
Haversion and Volkmann canals
Osteons
Which remodelling cells within bone are involved in the formation of new bone?
Osteoblasts
Which remodelling cells within bone are involved in bone reasorption?
Osteoclasts
