Nervous Impulse

Nerve impulse transmission refers to the ability of the neuron to...

• reproduce

• receive an chemical signal

• produce sodium or potassium

• send an electrochemical signal

The sodium potassium pump...

• is energy (ATP) free as sodium and potassium move in and out by diffusion as needed

• moves 3 sodium ions into the neuron and 3 potassium out only if ATP is present

• moves 3 sodium in to the neuron and 2 potassium without energy from ATP

• moves 3 sodium out of the neuron and 2 potassium into the neuron only if there is energy from ATP

Action potential refers to

• a very positive charge inside and outside of the neuron

• a very negative charge inside and outside of the neuron

• a change of charge between the inside and outside of the neuron

• action outside the membrane that cause the neuron's membrane to close all its pores

Which of the following gate opens during repolarization

• Na⁺ gates and Na⁺/K⁺ pump

• K⁺ gates and Na⁺/K⁺ pump

• Na ⁺ and K⁺ gates

• Na⁺ gates only

What is the most important factor required to maintain membrane potential

• A reactive sodium pore

• The sodium potassium pump

• The release of neurotransmitters at the synaptic terminal

• the the movement of water from high to low concentrations over the neuron's membrane

Before an action potential moves to the next neuron it must release

• sodium into the synapse

• positive protons into the synapse

• neurotransmitters into the synapse

• negative electrons in to the synapse

Which of the following can be observed during the 2^nd period of the graph?

• K+ gates open

• Na+ gates open

• Na+/K+ pump opens

• Na+ and K+ gates open

Which of the following does not affect the transmission speed of a neuron cell?

• the diameter of the nerve fiber

• the presence of myelin in the nerve cell

• temperature

• the strength of the stimulus

When a neuron is at REST,

• the inside of the neuron is negatively charged compared to the outside.

• the inside of the neuron is positively charged compared to the outside.

• there is no charge difference established

• none of these is true

Which statement about neurotransmitters is true?

• Neurotransmitters are produced by glands and they are transported to nerve cells through the bloodstream.

• Neurotransmitters transmit nerve impulses from one neurone to another neurone.

• Neurotransmitters are produced and released by dendrites.

• Neurotransmitters are produced only at the motor neurone.