Muscles

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22 Terms

1

Attrophy

Redcution in size/tone/power of muscle

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2

Fast Twitch

  • Contract quickly

  • Rapid generation of power

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3

Slow Twitch

  • Contract slowly

  • Resistant to fatigue

  • Efficient use of oxygen

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4

How do you contract muscles?

  1. Myosin head binds to actin (needs ATP, normally blocked by tropanin and tropomyosin, Calcium binds to those)

  2. Actin is pulled inwards by myosin head

  3. Myosin head releases (needs ATP)

  4. Myosin head reattaches

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5

Structure of Skeletal

  • Myofilaments (actin, myosin)

  • Sacromere

  • Myofibril

  • Fibre

  • Bundle

  • Muscle

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6

Antagonistic

For the action of each muscle, there is another muscle that has the opposite action

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7

Skeletal Function

  • Movement of bone

  • Regulate body temperature

  • Stabilize joints

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8

Skeletal Control

Voluntary

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9

Cardiac Control

Involuntary

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10

Smooth Control

Involuntary

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11

Arrangement of Skeletal

Fibres

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12

Arrangement of Cardiac

Branched

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13

Arrangement of Smooth

  • Parallel lines

  • Sheets

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14

Description of Skeletal Cells

  • Tubular

  • Striated

  • Many nuclei

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15

Description of Cardiac Cells

  • Tubular

  • Striated

  • One nucleus

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16

Description of Smooth Cells

  • Long

  • Tapered at ends

  • One nucleus

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17

Location of Skeletal

Attached to bone

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18

Location of Cardiac

Heart

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19

Location of Smooth

  • Intestines

  • Blood Vessels

  • Iris

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20

Relax

Passive state

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21

Contract

  • Shorten

  • Work is done

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22

Function of Muscles

  • Enable of movement

    • Convert chemical energy into kinetic energy

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