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APR > Chapter 10 Muscle Tissue > Flashcards

Chapter 10 Muscle Tissue Flashcards

1
Q

True or false? Phospholipids are a form of energy for the body?

A

False

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2
Q

What is the strongest of the cell junctions?

A

Desmosomes

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3
Q

What junctions contains fluid filled channels for intracellular communication

A

Gap junctions

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4
Q

True or false? Synovial membrane is NOT a type of epithelial membrane?

A

True

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5
Q

What are the characteristics of skeletal muscle?

A

Multi nucleated, striated and voluntary

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6
Q

What are the characteristics of cardiac muscle tissue?

A

One nucleus, striated, intercalated discs, involuntary

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7
Q

What are the features of visceral smooth muscle?

A

One nucleus, no striations, involuntary

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8
Q

What is epimysium

A

Dense irregular connective tissue, outer layer encircling the whole muscle

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9
Q

Perimysium

A

Dense irregular, surrounds bundles of 10-100 cells forming fascicles

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10
Q

Endomysium

A

Reticular, separates each individual muscle diver from each other

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11
Q

What are Transverse tubules

A

Thousands of invaginations of the sarcolemma toward the centre of muscle cell. They are filled with extracellular fluid allowing for the instant stimulation of all parts of the cell simultaneously with the same stimulus

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12
Q

Sarcoplasmic reticulum (SR)

A

Membranous sacs encircling each myofibril. The dilated ends of the SR are called terminal cisterns
Stores calcium ions for the muscle contraction

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13
Q

What is a triad formed by?

A

A T tubule and two terminal cisterns

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14
Q

Thin filaments are composed of?

A

Actin

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15
Q

Thick filaments are composed of?

A

Myosin

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16
Q

Z disc

A

Narrow plate-shaped regions of dense proteins that separates each sarcomere from each other

17
Q

Sarcomere

A

Basic functional unit of a myofibril that are arranged in compartments

18
Q

Myofibril

A

Contractile organelles that contain myofilaments

19
Q

A band

A

Dark middle part of sarcomere that extends entire length of thick filaments and includes those parts of thin filaments that over lap the thick

20
Q

I band

A

Lighter less dense area of sarcomere that contains remainder of thin filaments but NO thick filaments
A Z disc passes through centre of each I band

21
Q

H zone

A

Narrow region in centre of each A band that contains thick filaments but no thin filaments

22
Q

M line

A

Region in centre of H zone that contains proteins that hold thick filaments together at centre of sarcomere

23
Q

What are the contractile proteins

A

Myosin

Actin

24
Q

What are the regulatory proteins

A

Troponin

Tropomyosin

25
Q

What are the Structural proteins

A 
Titin
Nebulin
Alpha-actin
Myomesin
Dystrophin

APR (9 decks)

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