Cambridge art professor Larry Morton takes one, alcohol-glazed look at the huge, tattooed man looming in a dark alley, and assumes he’s done for. Moments later he finds himself disarmed—literally and figuratively. And, the next morning, he can’t rest until he offers an apology to the man who turned out to be more gentle than giant.
The structure forming the shell of a chamber is a box large enough to easily accommodate the organism being used as a subject. (Commonly used model organisms include rodents—usually lab rats—pigeons, and primates). It is often sound-proof and light-proof to avoid distracting stimuli.