2.13

Question 1

G protein

Answer 1

A protein coupled to a
metabotropic receptor; conveys messages
to other molecules when a ligand binds
with and activates the receptor.

Question 2

Second messenger

Answer 2

A chemical
produced when a G protein activates an
enzyme; carries a signal that results in the
opening of the ion channel or causes other
events to occur in the cell

Question 3

Excitatory Postsynaptic potential

Answer 3

An excitatory depolarization
of the postsynaptic membrane of a
synapse caused by the liberation of a
neurotransmitter by the terminal button

Question 4

Inhibitory postsynaptic potential

Answer 4

An inhibitory hyperpolarization of
the postsynaptic membrane of a synapse
caused by the liberation of a neurotransmitter by the terminal button.

Question 5

Reuptake

Answer 5

The reentry of a neurotransmitter
released from a terminal button back
through its membrane. This process
terminates the postsynaptic potential.