Histology Of Skeletal Muscle Flashcards

1
Q

What is visceral muscle

A

Smooth muscle

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2
Q

Where can smooth muscle be found

A

Arterial wall
Wall of intestine
Airways of lungs

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3
Q

What is voluntary muscle

A

Skeletal muscle

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4
Q

Where is skeletal muscle found

A

Skeletal muscles
Larynx
Diaphragm

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5
Q

What forms a syncytium

A

Myoblasts fused together to form multi-celled syncytium

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6
Q

How are myofibrils formed

A

Sacromeres joined end to end form myofibrils

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7
Q

What forms a muscle fibre

A

Cytoplasm filled with myofibrils forms a muscle fibre

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8
Q

What is a fascicle

A

Muscle fibre clumped together forms a fascicle

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9
Q

What are fascicles held together with

A

They arm held together with connective tissue
Endomycium
Perimycium
Epimycium

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10
Q

What is present in a skeletal muscle

A

Cell membrane
Nuclei
Contractile proteins
Mitochondria
Endoplasmic reticulum
Glycogen rich cytoplasm
Sarcolemma
Sacrocplasmic reticulum

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11
Q

What are the characteristics of skeletal muscle

A

Elongated fibres
Striated cytoplasm
Multinuclated
Nuclei at edge
Non-branching

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12
Q

What does it mean if a muscle is striated

A

Myofibrils in register

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13
Q

What are the different types of skeletal muscle

A

Type I skeletal is slow
Type II skeletal is fast

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14
Q

What detects stretch and tension in a muscle fibre

A

Muscle spindles

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15
Q

What is the function of sharpeys fibres

A

Connect muscle to bone and penetrate the bone

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16
Q

What makes up sharpeys fibres

A

Bundles of collagen fibres which link the epimysium and periosteum

17
Q

Where is an example that you can find sharpeys fibres

A

Rotator cuff muscles attached to the scapula

18
Q

What is the role of tendons

A

Connects muscles to bone

19
Q

What are the characteristics of tendons

A

Parallel bundles of collagen with intervening fibroblasts

20
Q

What type of muscle is this showing

A

Skeletal muscle

21
Q

What are the arrows pointing to

A

The first 2 top arrows = type I skeletal muscle
The first 2 bottom arrows = type 2 skeletal muscle

22
Q

What are the arrows point to

A

First arrow = endomysuim
Second arrow = perimysium
Third arrow = epimysium