Answer Happy

1. when voltage-gated K+ channels of a resting neuron open:
a. the neuron depolarizes
b. K+ enters the neuron
c. K+ enters the neuron and the neuron deplorizes
d. K+ leaves the neuron
2. acetylcholine is important in the synapse because it:
a. signals the exocytosis of the neurotransmitters
b. binds to receptors on the postsynaptic cell, opening ion channels and triggering graded
c. involves excitatory post synaptic potentials
d. leaves the axon terminal, hyperpolarizing the cell
3. blocking voltage-regulated K+ channels
a. stimulus cellular repolarization
b. inhibits cellular depolarization
c. stimulate cellular depolarization
d. inhibits cellular repolarization
4. in order to signal stronger stimulus action potential become
a. more frequent only
b. higher amplitude and more frequent
c. longer-lasting only
d. higher amplitude only