Typically, the gate of an ion channel remains closed until a(n) ____ binds to the receptor
a. ligand
b. enzyme
c. G protein
d. target cell
e. first messenger
a
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Choose from the following terms to fill in the blanks in the correct order
A. ligand B. signaling cell C. receptor D. responding cell In communication between cells, the _____________________ produces the signaling molecule, also known as the ________________; the ______________________ produces the _______________, to which the signaling molecule binds. A. B, A, D, C B. A, B, C, D C. B, C, A, D D. D, C, B, A
Which of the following organisms would contain sphingomyelin in its cell membrane?
A) bacteria B) algae C) animals D) bryophytes E) angiosperms
Which of the following is an example of a photoautotroph?
A) grass on the front lawn B) grizzly bears in Alaska C) bacteria in our mouths D) mushrooms growing on the side of a dead tree
________ are numerous short, branching projections from the neuron that create a huge surface for receiving signals from other cells
Fill in the blank(s) with correct word