Neurons, Myelinated, Types of neuron, Synapse, Synaptic cleft, Action potential, Neurotransmitters, Transduction, Excitatory, Inhibitory

Question 1

What are the types of neurons?

Answer 1

Motor neurons carry signals out from the CNS to tissues,
Sensory neurons carry signals from receptors to the CNS,
Association/Interneurons do the processing in the CNS (“thinking neurons”)

Question 2

Myelinated vs Unmyelinated Axons

Answer 2

Myelinated axons are the neuron axons that are covered with myelin sheaths. Unmyelinated axons are the axons that are not covered with myelin sheaths. The conduction of nerve impulses is faster in myelinated axons than unmyelinated axons.

Question 3

Synapse

Answer 3

The area where one neuron communicates with another neuron

Question 4

Synaptic clef

Answer 4

Many synapses do not have the Presynaptic Axon actually touching the postsynaptic cell. There is a small gap

Question 5

Spark

Answer 5

Although the signal (Action Potential) is electrochemical….there is no spark or charge that bridges the cleft. Instead, chemicals called Neurotransmitters are released into the cleft and bind to receptor sites on the next neuron

Question 6

When the neurotransmitter reaches the postsynaptic neuron it can do one of two things

Answer 6

1. It can attempt to get the postsynaptic neuron to fire! (create a new signal) “FIRE Please!”
2. It can attempt to prevent the postsynaptic neuron from firing. “Don’t FIRE!”

Question 7

Transduction

Answer 7

synaptic events where an electrical signal is converted into a chemical one by the release of neurotransmitters

Question 8

Excitatory

Answer 8

attempts to get the next neuron to create a signal of its own (Fires)

Question 9

Inhibitory

Answer 9

attempts to stop the next neuron from creating a signal