Which of the following statements regarding angiotensin II is(are) correct?
I. Angiotensin II is a hormone that is secreted by the kidneys.
II. A well-hydrated person is likely to have higher blood levels of angiotensin II than a dehydrated person.
III. Angiotensin II helps to slow the rate at which urine is produced.
IV. A class of drugs known as ACE inhibitors promote (enhance) the formation of angiotensin II.