Neuroscience

Select the correct part of a neuron that receives messages:

• Dendrites
• Axons
• Synapse
• Terminal branches

Select the correct function of the myelin sheath:

• creates the action potential
• speeds neural impulse
• protects the neuron
• covers the cell body

What creates an action potential?

• hyper-polarization of the neuron
• sensory neurons
• the movement of positively charged atoms in and out of the axon
• neurotransmitters

Why is the axon's membrane "selectively permeable"?

• it wont reach the correct threshold
• because of the electrical charge
• to create the tiny gap between two neurons
• at rest it doesn't allow positive ions to enter

What is the all or none response?

• the impulse travels faster depending on the stimuli
• a neuron either fires or it doesn't
• the intensity of the action potential

What is the function of the sodium-potassium pump?

• it works like the myelin sheath
• it allows flow of positive and negative ions to move through the axon
• it pumps the neurotransmitters to the synapse

Select the correct neurotransmitter that enables movement and memory:

• Dopamine
• Serotonin
• Acetyolcholine
• Endorphins

What does the "lock and key" phrase describe?

• the way the neurotransmitters are sent to other neurons
• the perfect fit of a neurotransmitter on the receptor site of the receiving neuron
• the way molecules mimick neurotransmitters

Select the incorrect part of the peripheral nervous system:

• CNS
• Autonomic
• Somatic
• Sympathetic

Of the three types of neurons, which one does your nervous system rely on the most?

• Sensory
• Motor
• Inter
• They all work together equally