Action Potential

Question 1

Parts of a Neuron

Answer 1

• Dendrites
• Cell body
• Nucleus
• Axon hillock
• Axon
• Axon terminals

Question 2

Types of Neuron

Answer 2

• Bipolar
• Semi-bipolar
• Multipolar

Question 3

Function of the Cell Body

Answer 3

Houses organelles and nucleus

Question 4

Function of the Dendrites

Answer 4

• Increases surface area for receiving signals
• Sends graded potential towards the cell body/axon
• “Input zone” for the neuron

Question 5

Function of the Axon

Answer 5

• Nerve fibers
• ## Conducts action potentials away from the cell body toward the axon terminals

Question 6

Function of the Axon Hillock

Answer 6

• Where the cell body meets the axon
• Trigger point for the all or nothing response
• Where graded potentials summate

Question 7

Function of Axon Terminals

Answer 7

• Where axons synapse with other neurons or the effector tissue
• Release chemical messengers

Question 8

Dyneins and Kinesins

Answer 8

• The microtubule railway that carry products up and down the length of the neuron
• Dyneins carry recycled vesicles and chemical messengers towards the cell body
• Kinesins do the same but towards the axon terminals