Apollo 11 was the spaceflight that landed the first humans on the Moon, Americans Neil Armstrong and Buzz Aldrin, on July 20, 1969, at 20:18 UTC. Armstrong became the first to step onto the lunar surface six hours later on July 21 at 02:56 UTC.eil Armstrong's certification: I certify that this World Scout Badge was carried to the surface of the Moon on man's first lunar landing, Apollo XI, July 20, 1969.. First Man on the Moon Commemorative Issue of 1969. Apollo 11 crew at the White House in 2004.
Detection of a specific molecule occurs on the outer surface of a receptor cell at a plasma membrane protein known as chemoreceptor. Generally, a chemoreceptor will detect just a single chemical or a small range of structurally similar chemicals.
Baroreceptors (or archaically, pressoreceptors or baroceptors) are sensors located in the blood vessels of all vertebrate animals.