Histology Of Skeletal Muscle Flashcards
What is visceral muscle
Smooth muscle
Where can smooth muscle be found
Arterial wall
Wall of intestine
Airways of lungs
What is voluntary muscle
Skeletal muscle
Where is skeletal muscle found
Skeletal muscles
Larynx
Diaphragm
What forms a syncytium
Myoblasts fused together to form multi-celled syncytium
How are myofibrils formed
Sacromeres joined end to end form myofibrils
What forms a muscle fibre
Cytoplasm filled with myofibrils forms a muscle fibre
What is a fascicle
Muscle fibre clumped together forms a fascicle
What are fascicles held together with
They arm held together with connective tissue
Endomycium
Perimycium
Epimycium
What is present in a skeletal muscle
Cell membrane
Nuclei
Contractile proteins
Mitochondria
Endoplasmic reticulum
Glycogen rich cytoplasm
Sarcolemma
Sacrocplasmic reticulum
What are the characteristics of skeletal muscle
Elongated fibres
Striated cytoplasm
Multinuclated
Nuclei at edge
Non-branching
What does it mean if a muscle is striated
Myofibrils in register
What are the different types of skeletal muscle
Type I skeletal is slow
Type II skeletal is fast
What detects stretch and tension in a muscle fibre
Muscle spindles
What is the function of sharpeys fibres
Connect muscle to bone and penetrate the bone
What makes up sharpeys fibres
Bundles of collagen fibres which link the epimysium and periosteum
Where is an example that you can find sharpeys fibres
Rotator cuff muscles attached to the scapula
What is the role of tendons
Connects muscles to bone
What are the characteristics of tendons
Parallel bundles of collagen with intervening fibroblasts
What type of muscle is this showing
Skeletal muscle
What are the arrows pointing to
The first 2 top arrows = type I skeletal muscle
The first 2 bottom arrows = type 2 skeletal muscle
What are the arrows point to
First arrow = endomysuim
Second arrow = perimysium
Third arrow = epimysium
