Given the task definition, example input & output, solve the new input case.
You are given a passage. You need to construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is the whole paragraph. Avoid creating questions that can be answered correctly without actually understanding the paragraph.
Example: Optical mice use an LED and a camera to rapidly
capture images of the surface beneath the mouse.
The infomation from the camera is analyzed by a
DSP (Digital Signal Processor) and used to detect
imperfections in the underlying surface and
determine motion. Some materials, such as glass,
mirrors or other very shiny, uniform surfaces
interfere with the ability of the DSP to
accurately analyze the surface beneath the mouse.

Since glass is transparent and very uniform, the
mouse is unable to pick up enough imperfections in
the underlying surface to determine motion.
Mirrored surfaces are also a problem, since they
constantly reflect back the same image, causing
the DSP not to recognize motion properly. When the
system is unable to see surface changes associated
with movement, the mouse will not work properly.
Output: why doesn't an optical mouse work on a glass
table?
The passage talks about the glass and mirror surfaces beneath the optical mice and how the mouse is unable to pick up enough imperfections in the underlying surface to determine motion. The last line of the passage explains why the mouse will not work properly on these surfaces. Thus it is a positive example.

New input case for you: 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
Output:
how do beta blocking hypertension meds work and explain the meaning of beta in this situation.?