Anatomy & Physiology - CH9A NS #1

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Description and Tags

Muscle Structure

20 Terms

1

contraction

shortening and thickening

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2

relaxation

back to resting state

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3

muscle makes up to ___ of the total body weight

40-50%

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4

strength

what comes from the conversion of chemical energy (ATP) into mechanical energy to generate force, perform work, and produce movement?

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5

functions of muscle tissue

motion, stabilize body position, movement within the body and regulation organ volume

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6

thermogenesis

maintains normal body temperaturesh

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7

shivering

involuntary action that can increase thermogenesis by several hundred percents

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8

skeletal muscle

attached primarily to bones and moves skeletal parts

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9

striated

visible alternating light and dark bands of the fibers

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10

voluntary

muscle tissue is under your conscious control

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11

cardiac muscle

forms majority of the heart

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12

involuntary

out of your control, conscious or unconscious

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13

autorhythmicity

pacemaker system that causes heart to beat

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14

smooth muscle

found in the walls of hollow internal structures

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15

excitability

ability to respond to stimulus internal or external, by producing electrical signals

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16

neurotransmitter

chemical released by neurons

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17

hormone

chemical distributed by the bloodstream

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18

contractility

ability to shorten and thicken

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19

extensibility

the ability to be stretched without damage to the tissue

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20

elasticity

ability of a muscle fiber to recoil and resume its resting length after being stretched

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