Unit 1: Parts of Neurons and Neural Firing

Question 1

Dendrite

Answer 1

receives information from other neurons by collecting neurotransmitters -Dendrite Detect (DD)

Question 2

Axon

Answer 2

passes information to other neurons, muscles, and glands by releasing neurotransmitters from terminal buttons-Axons Announce (AA)

Question 3

Myelin Sheath

Answer 3

insulates the axon and conducts electrical impulses

Question 4

Multiple Sclerosis (Myelin Sheath)

Answer 4

breakdown of myelin sheath causes this disease: symptoms include tremors, weakness and vision problems

Question 5

Action Potential

Answer 5

firing of an electrical charge within within a single neuron, travels down axon

Question 6

All or Nothin Principle (Action Potential)

Answer 6

neuron either fires or doesn’t; no halfway

Question 7

Resting Potential (Action Potential)

Answer 7

positive ions (electrically charged atoms) on outside/negative on inside; neuron is ready to fire

Question 8

Firing Threshold (Action Potential)

Answer 8

the minimum energy required for a neuron to fire

Question 9

Depolarization (Action Potential)

Answer 9

When firing, positive ions rush in / negative rush out

Question 10

Refractory period (Action Potential)

Answer 10

time it takes a neuron to recharge (can’t fire in this period)

Question 11

Axon Terminal Buttons

Answer 11

the branched end of an axon that contains neurotransmitters and sends them into the synapse (synaptic vesicles that hold neurotransmitters until released)

Question 12

Synapse/Synaptic Gap

Answer 12

the space between the axon terminal and the dendrites of the receiving neuron which neurotransmitters go through to pass to the next neuron