Psyc 2- Resting Potential

What is the cell membrane's permeability to Na+?

• Highly permeable

• Moderately permeable

• Relatively impermeable

• Completely impermeable

What forces push an ion across an open ion channel?

• Facilitated diffusion and Endocytosis

• Osmosis and Active transport

• Passive transport and Exocytosis

• Diffusion and Electrostatic

What is the resting membrane potential of the neuron?

• -75 mV

• -60 mV

• -65 mV

• -70 mV

What is the inside of the neuron's charge compared to the outside?

• 100 mV more negative

• 65 mV more positive

• 65 mV more negative

• Equal charge

What causes the unequal distribution of ions?

• Selective permeability of the cell membrane

• Active transport of ions

• Passive diffusion of ions

• Endocytosis of ions

What is the function of the Na+/K+ pump?

• Pumps out 1 Na+ and pumps in 1 K+

• Pumps out 2 Na+ and pumps in 3 K+

• Pumps out 4 Na+ and pumps in 4 K+

• Pumps out 3 Na+ and pumps in 2 K+

Where is the spike initiation zone located?

• Postsynaptic Neuron

• Soma

• Axon Hillock

• Presynaptic Neuron

What is the primary function of the axon hillock?

• To receive signals from other neurons

• To initiate the action potential

• To integrate incoming signals

• To release neurotransmitters

What is the role of the presynaptic neuron?

• Receives signals from other neurons

• Releases neurotransmitters

• Initiates the action potential

• Integrates incoming signals

What is the role of the postsynaptic neuron?

• Integrates incoming signals

• Releases neurotransmitters

• Initiates the action potential

• Receives signals from other neurons