1. Adrenalin causes a marked constriction of the human coronary artery, although it undoubtedly produces a relaxation in some mammals; e. g., calf, sheep, pig, etc.
2. The human coronary artery is probably provided with sympathetic vasoconstrictors.
3. If human blood-vessels are obtained in a warm condition within a few hours after death, they are often suitable for biological and pharmacological study.
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Copyright, 1912, by The Rockefeller Institute for Medical Research New York
1912
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