I: | is a vasoconstrictor |
II: | stimulates the adrenal cortex to secrete aldosterone |
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect |
The principal cation in the extracellular fluid is:
1. Ca2+ | 2. K+ |
3. Mg2+ | 4. Na+ |