Neuron

Question 1

Dendrite

Answer 1

• Recieve information from other neurons

Question 2

Axon

Answer 2

• Transmits signals to other neurons

Question 3

Myelin Sheath

Answer 3

• Fatty material- acts as insulation

Question 4

Nodes of Ranvier

Answer 4

• Gaps in myelin- allows saltatory conduction (leaping- electrical) and helps the signal travel faster (signal hops from node to node)

Question 5

Synpase

Answer 5

• Come in contact with next dendrite -> neurotransmitters pass information from one neuron to the next

Question 6

Membrane potential

Answer 6

• Difference in voltage or electrical charge between the inside and outside of membrane

Question 7

Sodium Potassium Pump

Answer 7

• Where the build up of voltage handled-> creates voltage differential by moving positively- charged sodium ions out for every 2 potassium ions in –> net negative charge inside
• Inside is positive and outside is negative -> sodium channels close and potassium channels open-> Want negative inside and positive outside
• Pumps burn up ATP to pump out sodium back out and potassium back in

Question 8

Resting potential

Answer 8

• When neuron is inactive- 70 milli volts

Question 9

10n channels

Answer 9

• Proteins straddle membranes –> do not need ATP

Question 10

Action potential

Answer 10

• Where electrical potential of cell rises and falls
• Input/stimulus- creates a change in the neuron which reaches the axon
• Signal changing voltage travels down neuron’s membrane like a wave

Question 11

Saltatory conduction

Answer 11

• Sppeds up travel time of action potential down the neurons

- Myelin insulates the signal so it is not a steady wave

Question 12

Exocytosis

Answer 12

• Wave reaches end of neuron triggers release of neurotransmitters-> neurotransmitters flow from synapse to next neuron

Question 13

Sensory neuron

Answer 13

• Carry information to the brain and the spinal cord for analysis

Question 14

Association neuron

Answer 14

• Found in central nervous system. In the spinal cord is for inhibitory control. Interconnect other cells with one another.

Question 15

Motor neuron

Answer 15

• Carry information from the brain and spinal cord to muscles to allow movement
• Go to other organs –> helps make them work
• Carry information to special parts of the brain to other parts of the brain and spinal cord