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Pharm 204 > Muscles > Flashcards

Muscles Flashcards

1
Q

Skeletal muscle

A

mulitnucleate with striations from Z-discs

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2
Q

Cardiac muscle

A

Single cells that appear striated by desmosomes and gap junctions

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3
Q

Smooth muscle

A

single cells, non striated

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4
Q

Muscle structure

A

myofibril, sarcolema, endomysium, muscle fiber, perimysium, skeletal muscle, epimysium

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5
Q

Tendons

A

connect muscle to bone
can actively stabilize joints
same basic composition as ligaments

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6
Q

epitenon

A

sheath the covers entire tendon

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7
Q

paratenon

A

double layers sheath surrounding areolar tissuet

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8
Q

tenosynovium

A

epitenon + paratenon

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9
Q

muscle innervation

A

Via ventral horn alpha motor neurons

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10
Q

Motor unit

A

alpha motor neuron + all muscle fibres connected to it

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11
Q

parallel muscles

A

all fibres going along long axis and muscle shortens and bulges when contracted

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12
Q

convergent muscles

A

Fan shaped, as fibres originate over wide angle but converge to one attachment
not as strong and vectors of force are all over the place

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13
Q

pennate muscles

A

Like feathers they branch off an internal tendon
can be stronger for less mass

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14
Q

unipennate muscles

A

muscle on one side of tendon

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15
Q

bipennate muscles

A

muscle on both sides of tendon

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16
Q

multipennate muscles

A

tendon branches within muscle

17
Q

circular muscles

A

sphincters

18
Q

axial muscles

A

position head, vertebrae, rib cage and pelvic floor

19
Q

appendicular muscles

A

anything that moves appendicular skeleton

20
Q

diaphragm

A

large muscle that when contracted pulls air in

21
Q

Perineal region

A

pelvic floor
urogenital triangle (anterior)
anal triangle (posterior)

22
Q

extrinsic hand muscles

A

mostly in forearm

23
Q

intrinsic hand muscles

A

found in the palm or dorsum

24
Q
A

Pharm 204 (19 decks)

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