Muscle Cells Flashcards

1
Q

What are the three types of muscle tissue called?

A

-Smooth muscle tissue
-Cardiac muscle tissue
-Skeletal muscle tissue

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2
Q

What are some features of smooth muscle tissue?

A

-Short, tapered cells
-No striations

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3
Q

Where is smooth muscle tissue found?

A

Stomach and airways of muscles

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4
Q

What does smooth muscle tissue do?

A

Contracts and relaxes involuntarily

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5
Q

What are some features of cardiac muscle tissue?

A

-One nucleus per cell
-Striated with intercalated discsW

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6
Q

Where is cardiac muscle tissue found?

A

Heart

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7
Q

What does cardiac muscle tissue do?

A

Cells divide and converge

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8
Q

What are some features of skeletal muscle tissue?

A

-Long
-Multinuclear parallel cells
-Striated (perpendicular to fibre)

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9
Q

Where is skeletal muscle tissue found?

A

-Bone
-Skin
-Fascia

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10
Q

What do skeletal musclle tissues do?

A

-Each one has its own nerve to stimulate contraction and its own artery and vein
-Voluntary

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11
Q

What are regulatory proteins?

A

-Turns contractions on/off
-Troponin and tropomyosin
-Troponin is composed of the sub-units(I,C and T) that contract with calcium(C), actin(I) and tropomyosin(T)

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12
Q

What is myosin?

A

Thick filaments

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13
Q

What happens to myosin during muscle contraction?

A

Myosin heads extend towards the thin filaments

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14
Q

What are the Z discs held together by?

A

M line proteins

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15
Q

What are the myosin binding sites covered by?

A

Tropmyosin when relaxed

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