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Human Biology > muscles > Flashcards

muscles Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

skeletal muscle fiber

A

made up of smaller microscopic units called sarcomeres

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2
Q

sarcolemma

A

plasma membrane of a muscle fiber

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3
Q

sarcoplasma

A

cytoplasm of a muscle fiber

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4
Q

myoglobin

A

red pigment in muscles to carry oxygen

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5
Q

epimysium

A

outer most covering of dense connective tissue, encircle entire muscle (top)

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6
Q

perimysium

A

wrapping around the fascicle, dense irregular tissue (middle)

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7
Q

endomysium

A

wrapping of areolar connective around muscle fiber

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8
Q

sarcoplasmic reticulum

A

found around each myofibril

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9
Q

contractile protein

A

actin + myosin

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10
Q

tropomyosin + troponin

A

regulatory proteins; regulate the contraction + relaxation

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11
Q

vesicle

A

membraneous sac filled w/ stuff

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12
Q

“MYO”globin

A

transports oxygen to muscle cells specifically mitochondria to produce ATP in cell respiration

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13
Q

Thick

A

Myosin

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14
Q

Thin

A

Actin

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15
Q

Exocytosis

A

form of active transport

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16
Q

Acetylcholine (ACh)

A

neurotransmitter

17
Q

Ca

A

Calcium ions

18
Q

Na

A

Sodium ions

19
Q

K

A

Potassium ions

20
Q

Three types of muscles

A

smooth, cardiac, and skeletal

21
Q

Sarcomere

A

unit of muscle contraction is made up (laments > actin + myosin)

22
Q

z line to z line

A

one sarcomere length

23
Q

m line

A

marks the middle of sarcomere

24
Q

h zone

A

takes in ONLY thick (myosin)

25
Q

a band

A

takes in entire myosin length

26
Q

i band

A

takes only the actin w/ no myosin overlap

27
Q

sliding filament

A

actin + myosin DO NOT change in length, just slide towards m line

28
Q

skeletal muscles

A

attached to bone by tendons; in movement, one bone stays stationary + the other moves

Human Biology (19 decks)

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