Problem:

Question 1: Which neurotransmitter activates nicotinic receptors? Where are nicotinic receptors located? Nicotinic receptors are permeable to which ions. If the voltage of the membrane was +80mV what would happen if you opened nicotinic receptors? If the voltage of the membrane was -80mV what would happened if you opened nicotinic receptors?

Question 2: What neurotransmitter system does atropine effect? What about muscarine? Are those drugs agonists or antagonists?

Question 3: If a graded potential applied to the cell body of a neuron barely depolarizes the axon hillock to threshold what do you think would happen if you had the same graded potential applied to the dendrites of the post synaptic neuron?

Question 4: Describe four methods of depolarizing a post synaptic neuron. Focus on how changing ion permeability influences membrane potential.

Please provide description of your answers.