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Animal Anatomy > Chapter 8 Muscles > Flashcards

Chapter 8 Muscles Flashcards

Exam 3

1
Q

Skeletal Tissues

A

Long cylindrical fibers, voluntary movements

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2
Q

Cardiac Tissues

A

Short branched, contracts heart to pump blood

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3
Q

Smooth Tissues

A

Short-spindled fiber, involuntary movement

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4
Q

Fascicle

A

Skeletal muscles separated into fiber bundles

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5
Q

Tension Transfer

A

Mysio - tendon - periosteum to pull on bone

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6
Q

Sarcomere

A

Packet of microfilaments and regulatory proteins

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7
Q

Myosin

A

Strands with multiple heads, thick filament

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8
Q

Actin

A

Thin strands and troponin-tropomyosin complex

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9
Q

T - tubules

A

Carry action potential into cell interior, trigger calcium ion channel to open

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10
Q

Electroplaques

A

Electrical organs as modified muscle cells, loss of myosin and actin

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11
Q

Neuromuscular Junction

A

Where motor neurons terminal meets muscle fibers

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12
Q

Muscle Relaxation

A

Action potential triggers membrane to depolarize, calcium ions are released from sarcoplasmic reticulum

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13
Q

Muscle Contraction

A

Calcium ions enter the cell and use ATP, neuron signal required to maintain contraction

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14
Q

Sliding Filament Model

A

Occurs when myosin-binding sites on actin filaments are exposed

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15
Q

ATP Contraction

A

Myosin heads pull actin, detach, then reattaches again

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16
Q

Cross-bridge Formation

A

Myosin head attaches to actin while adenosine diphosphate and inorganic phosphate are bound to myosin

17
Q

Concentric Contraction

A

Involves muscle shortening to move a load

18
Q

Eccentric Contraction

A

Muscle tension diminishes and muscle lengthens, movement and balance

19
Q

Tendons

A

Strong bands of dense connective tissue, connects muscles to bone

20
Q

Flexion/Extension

A

Sagittal plane with anterior-posterior movements of neck-trunk-limbs

21
Q
A

Animal Anatomy (4 decks)

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