Asteroid hormone reaches its target cell. which event happens next?
a. it binds itself to the receptors on the surface of the cell membrane, which activates enzymes inside the cell.
b. it passes through the cell membrane and attaches itself to a receptor protein inside the cell.
c. it passes on the signal to the secondary messengers inside the cell, which activate the receptors on the cell membrane.

B. It passes through the cell membrane and attaches itself to a receptor protein inside the cell.

Explanation:

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.