15. a ligand that cannot cross the cell membrane can send a message to a cell by
binding to a
receptor, which then
shape.

Which best explains how this maneuver unblock a person's airway?

What do lava flows made of aa indicate about the type of volcanic eruption that occurred? a. the eruption was viscous. b. the eruption was pyroclastic. c. the eruption was explosive. d. the eruption was quite. !

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur