Given the task definition and input, reply with output. You are given a passage. Using the information present in the passage, you need to classify it into one of the 10 topics: 0 - 'Society & Culture', 1 - 'Science & Mathematics', 2 - 'Health', 3 - 'Education & Reference', 4 - 'Computers & Internet', 5 - 'Sports', 6 - 'Business & Finance', 7 - 'Entertainment & Music', 8 - 'Family & Relationships', 9 - 'Politics & Government'.

There are at least 3 types of beta receptors in the body - beta 1, 2, and 3 - and they are sensitive to epinephrine and norepinephrine. beta 1 controls heart rate and force of contraction in the heart (an increase in these will increase blood pressure, thus blocking them will lower blood pressure). beta 2 controls smooth muscle many places in the body. beta 3 receptors have less well defined role in fat metabolism.

The late American scientist Raymond Ahlqvist suggested already in 1948 that opposite effects of catecholamines were mediated by different receptors in the target organs, which he called alpha- and beta-receptors. http://nobelprize.org/medicine/laureates/1988/press.html
1