Vasocontriction

Question 1

Voltage gated Ca channels

Answer 1

Depolarization -> voltage gated Ca channels open -> increased Ca

Question 2

Voltage gated Na channels

Answer 2

Depolarization -> voltage gated Na channels open -> more depolarization -> Ca channels open -> increased Ca

Question 3

Stretch-activated (SA) nonselective cation channels

Answer 3

Stretch -> SA channels open -> depolarization -> voltage gated Ca channels open -> increased Ca

Question 4

Receptor-operated Ca channels (ROCs)

Answer 4

Agonist (e.g. adenosine) -> ROC Ca channels open -> Ca entry -> increased Ca

Question 5

Adrenergic receptor (alpha)

Answer 5

Agonist (e.g. norepinephrine) -> adrenoreceptor alpha 1 ROC Ca -> increased Ca

Question 6

Endothelin receptor ETa

Answer 6

ET -> endothelin receptor ETA -> increase in Ca

Question 7

Na-Ca exchanger

Answer 7

Depolarization -> voltage gated Na channels open -> Na entry -> increased Ca