3 types of muscle

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What are bones also known as?
Osteocytes
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What components are bones made from?
Organic and non-organic components of bone.
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What provides strength?
Calcium and magnesium phosphate.
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What provides flexibility?
Collagen.
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What are the 3 types of muscle?
Smooth muscle (involuntary), cardiac muscle and striated muscle (voluntary).
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What filaments do these all contain?
Thin actin and thick myosin.
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What is smooth muscle innervated by?
The nervous system.
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Describe the contraction of smooth muscle and the rate the cells tire at
Contraction is slow, but cells tire slowly too.
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What is smooth muscle triggered to contract by and how are the cells arranged?
Triggered to contract by hormones (oxytocin). Appear as cylinders next to each other - cells are long and thin.
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Is smooth muscle voluntary or involuntary? And is it striated?
Smooth muscle is involuntary and not striated.
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What are examples of where involuntary action happens?
Iris of eye - controls light intensity. Walls of intestine - peristalsis.
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What does cardiac muscle form and what is it controlled by?
Forms cardiac muscle - some myogenic. Controlled by autonomic nervous system.
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How are the cell joined and what do they contain?
Cardiac muscle cells joined by intercalated discs (cell membranes). Contain gap junctions which allow rapid diffusion.
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Describe contraction/relaxation and rate at which cells tire.
Contraction/relaxation is powerful and cells do not fatigue.
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Is cardiac muscle striated?
Yes, cardiac muscle is striated.
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What is striated muscle involved in?
Movement of skeleton at joints - movement of limbs.
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What are the strips in striated muscle caused by?
Arrangement of protein fibres in cells.
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Describe the contraction of striated muscle and the rate the cells tire
Contracts powerfully and quickly. Cells tire quickly.
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What can striated muscle be described as?
Multinucleate.
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What is the sarcolemma?
Cell surface membrane which surround the fibres.
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Describe the sarcomere
Smallest contractile unit of a muscle.
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What is the sarcoplasm?
Muscle cell cytoplasm.
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What does the sarcoplasm contain?
Mitochondria, sarcoplasmic reticulum, myofibrils.
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Card 2

Front

What components are bones made from?

Back

Organic and non-organic components of bone.

Card 3

Front

What provides strength?

Back

Preview of the front of card 3

Card 4

Front

What provides flexibility?

Back

Preview of the front of card 4

Card 5

Front

What are the 3 types of muscle?

Back

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