When a membrane potential reaches +30mV, ________ channels open, ________ occurs, and ________ channels close.

postassium, repolarization, sodium

Sodium, depolarization, potassium

Potassium, depoloarization, sodium

sodium, repolarization, potassium

Which is the correct nerve pathway?

dendrite > cell body > axon > synapse > dendrite

dendrite > axon > cell body > synapse > dendrite

axon > cell body > dendrite > synapse > axon

axon > cell body > dendrite > synapse > dendrite

What is NOT true about #2

an action potential is in progress

Once hyperpolarized, how does the cell get back to a resting state?

The Na+/K+ pump moves K+ in and Na+ out

The Na+/K+ pump moves Na+ in and K+ out

How are the Na+ / K+ channels different from the Na+ / K+ pumps

Channels: passive transport Na+ moves into the cell, K+ moves out. Pumps: active transport, K+ moves in & Na+ moves out

Channels: passive transport K+ moves into the cell, Na+ moves out. Pumps: active transport, Na+ moves in & K+ moves out

Channels: active transport Na+ moves into the cell, K+ moves out. Pumps: passive transport, K+ moves in & Na+ moves out

Channels: active transport K+ moves into the cell, Na+ moves out. Pumps: passive transport, Na+ moves in & K+ moves out

Which is NOT true about process #2

#2 happens in response to Ca+ moving down into terminal end

Nerve impulse triggers Ca+ to move into cell

Ca+ triggers vesicles to fuse with synaptic membrane

#2 happens in response to Na+ moving down into terminal end

What is happening at step #5

Neurotransmitter binds to receptor, Na+ moves into dendrite

Ca+ binds to receptor, Na+ moves into dendrite

Neurotransmitter binds to receptor, Ca+ moves into dendrite

Na+ binds to receptor, Ca+ moves into dendrite

What happens if enough of (C) accumulate in the dendrite

The postsynaptic neuron's dendrite becomes depolarized

The postsynaptic neuron's dendrite becomes repolarized

The postsynaptic neuron's dendrite releases neurotransmitters

The postsynaptic neuron's dendrite releases calcium

When a neuron is resting, the inside of the axon has a ____________ charge in relation to _______________.

negative, the surrounding cytoplasm

positive, the surrounding cytoplasm

When the neuron is at resting state (#1) which of the following is NOT true

There is more Na+ outside of the cell

There is more K+ inside the cell

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