In which phase of the ventricular muscle action potential is the potassium permeability the highest?

#Question id: 11215

#Unit 7. System Physiology – Animal

If excitatory postsynaptic potentials (EPSPs) are produced nearly simultaneously through two different synapses on the same postsynaptic neuron, the EPSPs can also add together creating ________.

#Question id: 11216

#Unit 7. System Physiology – Animal

When two excitatory postsynaptic potentials (EPSPs) occur at a single synapse so rapidly in succession that the postsynaptic neuron's membrane potential has not returned to the resting potential before the second EPSP arrives, the EPSPs add together producing ________.

#Question id: 11217

#Unit 7. System Physiology – Animal

One-way synaptic transmission occurs because ________.

#Question id: 11218

#Unit 7. System Physiology – Animal

Neurotransmitters can affect postsynaptic cells by ________.

I) initiating signal transduction pathways in the cells

II) causing molecular changes in the cells

III) altering ion channel proteinsIII) altering ion channel proteins

IV) altering the permeability of the cells

#Question id: 11219

#Unit 7. System Physiology – Animal

The amino acid that operates at most inhibitory synapses in the brain is ________.

#Question id: 11220

#Unit 7. System Physiology – Animal

The botulinum toxin, which causes botulism, reduces the synaptic release of ________.