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28 Cards in this Set
- Front
- Back
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What are the 5 properties of muscle? |
1) Excitability - electrical response 2) Conductivity - electrical excitation spreads 3) Contractility - ability to shorten 4) Extensibility - stretch ability 5) Elasticity - recoils |
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What are the 3 classes of muscle? |
1) skeletal muscle 2) cardiac muscle 3) smooth muscle |
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Whats the appearance/function of skeletal muscle? |
Striated, multinucleated, voltuntary muscle, myofibers |
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What is the appearance/function of cardiac muscle? |
Striated, uninucleated (usually), involuntary muscle, branched cardiocytes |
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What is the appearance/function of smooth muscle? |
Non-striated, uninucleated involuntary, fusiform (spindle) |
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What does having a striated muscle mean? |
Stration alternating bands in the muscle (light pink and dark pink) |
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Can Cardiac muscle also be a part of the Aorta? Meaning is Aorta a part of cardiac muscle? |
No, cardiac muscle is ONLY in the heart |
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Is cardiac muscle voluntary or involuntary muscle? |
It’s voluntary because we can’t control out heart contraction |
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What part connects cardiocytes so that the whole muscle contracts and not only a part of it? |
Intercalated disc |
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What kind of muscle is the most common in our body? Our arrector pili is a type of this muscle |
Smooth muscle |
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What muscle is responsible for contraction and dilation of veins? |
Smooth muscle |
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What kind of muscle is responsible for digestion? |
Smooth muscle |
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What kind of muscle does this look like? What are those purple circles? |
Cardiac muscle. The purple circles are the nucleus |
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What kind of muscle does this look like? |
Smooth muscle |
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What kind of muscle does this look like? |
Skeletal muscle |
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What is this? This is a long cylindrical contractile element within muscle fiber; it is as long as the muscle fiber itself |
Myofibril |
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What are myofibril made of? |
They are made of proteins in two different forms. Thin miofilaments and thick miofilaments. They overlap each other in the cell. |
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When we weight lift, and gain muscle in our bicep, what happened to our muscle cell? |
Our muscle grows IN SIZE and NOT IN NUMBERS. We made more myosin and actin |
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Once a muscle is destroyed, can it regenerate? Why or why not? |
Once a muscle is destroyed, it can never come back because muscle can not do mitosis |
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What are the thick line (pink layer) made out of? How about the thin (black layer)? What are they made out of |
Thick line is made out of myosin and thin line is made of actin |
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True or false: smooth muscle can contract |
True |
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Do smooth muscle have organelles? |
No. Smooth muscles have NO organelles |
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Where can skeletal muscle be found? |
They can be found attached to bones (usually via tendons). Example: our bicep |
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How many layers does skeletal muscle have? |
3 layers |
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What are the 3 layers of skeletal muscle |
1) Epimysium 2) Perimysium 3) Endomysium |
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How many layers do Cardiac Muscles have? |
Only one layer of endomysium |
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How many layers do smooth muscle have? |
Only one layer of endomysium |
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What does the word “Sacro” mean? |
Flesh |
