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Angiotensin:

I:	is a vasoconstrictor
II:	stimulates the adrenal cortex to secrete aldosterone

Subtopic: Osmoregulation |

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Level 1: 80%+

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The principal cation in the extracellular fluid is:

1. Ca²⁺	2. K⁺
3. Mg²⁺	4. Na⁺

Subtopic: Osmoregulation |

73%

Level 2: 60%+

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