試題詳解

68. In the cells of the nervous system, which one is the correct description?
(A) Ionotropic receptors act by activating G proteins in target cells.
(B) Metabotropic receptors act by initiating changes in second messenger systems in target cells.
(C) Action potentials are typically also graded potentials.
(D) Electrical synapses transmit signals using neurotransmitters.
(E) Most of the cells in your brain are neurons.