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Phgy209 > Ragsdale Cerveau > Flashcards

Ragsdale Cerveau Flashcards

1
Q

Tetrodoxin

A

Puffer fish : blocks NA+ channels

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2
Q

Batrachotoxin

A

Phyllobates frogs: Na+ channels activator (deadliest poison) ( pcq des que 1% des channels ouverts, tout ouvre)

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3
Q

Myelin is formed by

A

PNS: Schwann cells or neurolemmocytes
CNS: oligodendrocytes

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4
Q

Saltatory conduction

A

Quand il y a de la myelin

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5
Q

Main excitatory neurotransmetteur in the brain

A

Glutamate

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6
Q

LTP

A

Long-term potentiation

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7
Q

Main inhibitory neurotransmitter in the brain:

A

GABA

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8
Q

Origin of neurons that release neuromodulators

A

Small brainstem or midbrain nuclei

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9
Q

Un Bb muscle fiber

A

Myoblast

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10
Q

Single unit of contraction

A

Sarcomere

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11
Q

Entre les thick and thin filaments

A

Crossbridges: head groups of the myosin molecules

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12
Q

NT at neuromuscular junction

A

Acetylcholine

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13
Q

Muscle contraction: 2 Ca channels

A 
DHP receptor (direct link with T-tubules: extra cellular fluid)
Ryanodine receptor (flow of Ca comes from SR: sarcoplasmic reticulum)
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14
Q

How does Ca triggers contraction?

A

Binds to trop on in on thin filaments. Triggers a conformational change that makes the tropomyosin moves from the myosin binding site on the thin filaments

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15
Q

Première source d’ATP dans le muscle en contraction

A

Transfert du phosphate de Creatine Phosphate à de l’ADP (donc on obtient ATP et Creatine) faite par Creatine Kinase

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16
Q

Epsp dans un muscle

A

Endplate potential

17
Q

Receptors of noripinephrine

A

a adrénergic and b adrenergic receptors

18
Q

Inputs for the autonomic nervous system synapse:

A

Nucleus of the solitary tract of the brainstem

19
Q

Nucleus of the solitary tract

A

Toute info senso pour autonomic response arrive là: dans le brainstem

20
Q

Tension in muscle

A

Summation (in one muscle fiber) vs recruitment (of plusieurs motor units)

Phgy209 (4 decks)

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