Midterm2- Heart Regulation
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18 terms
Terms | Definitions |
|---|---|
 The most important controls on heart are by? Besides, what also play a role? | ANS; emotions |
| When Stress/Fright occur, they activate Sympathetic Fibers and do what? | Release of Norepinephrine to bind B1 receptors |
| The release of Norepinephrine cause what? | Pacemaker to fire more rapidly and lead to higher heart-beat. |
| What nervous system would sometimes oppose the Higher Heart-beat lead by Sympathetic? | Para-sympathetic |
| Parasympathetic is mediated by what? And what's the consequence of the mediatation? | AcH; Pottasium Channels open |
| What will be released when Norepinephrine is being released during Sympathetic Activation? | Epinephrine |
| NE enhances heart beat and contractility. What else do these? | Epinephrine |
| The functions or effects or NE and Epinephrine are enhanced by? | Thyroxine |
| HyperThyroidism cause what and why? | Weakened Heart, because it over-works the heart |
| Too much Calcium is called what? | Hyper-Calcemia |
| Too much Calcium cause what? | Heart irritibility/ Spastic Heart Contractions |
| Low calcium called what? | Hypo-Calcemia |
| Low calcium cause what? | Depress the heart action (contraction) |
| Too much Sodium is called what? | Hyper-natremia |
| Too much Sodium cause what? | Block Heart Contraction |
| How Sodium block Heart Contraction? | By inhibiting the Calcium Ions go into the Heart |
| Too much Pottasium is called what? | Hyper-kalemia |
| What does Hyper-kalemia do? | lower the resting potential and interferes depolarization |
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