CBNS 121 Final Exam Questions and Answers Latest Update 2025
What is the function of the axon? - Answers it conducts signals and forms synapses with
targets
What is the function of the dendrite? - Answers receives information from other neurons
What is the pre-neuron called? - Answers neurite
What happens when you cut an axon? - Answers it allows ONE dendrite to become a new axon
What are two things that help the axon find the correct target? - Answers Environmental cues
guidepost cells
What are the two long range cues mentioned in class? - Answers netrins and semaphorins
What are the two short range cues mentioned in class? - Answers cadherins and ephrins
What is the growth cone? - Answers the leading edge of the axon
Why do neurons die? - Answers neurons are overgenerated during development and so
programmed cell death acts as a control over neuronal number
What are some of the reasons why a neuron may die? - Answers remove non functioning cells
remove cells that with inappropriate connections
systems matching
remove guidance cues
remove transiently important cells
remove harmful cells
evolutionary change
What are the two types of neuronal death? - Answers necrosis
programmed cell death
Why does necrosis occur? - Answers the cell has become injured
pyknosis - Answers condensation of nuclear material that occurs during necrosis
What type of cell death occurs during a stroke? - Answers necrosis:
hemorrhagic and ischemic
What is the function of the axon? - Answers it conducts signals and forms synapses with
targets
What is the function of the dendrite? - Answers receives information from other neurons
What is the pre-neuron called? - Answers neurite
What happens when you cut an axon? - Answers it allows ONE dendrite to become a new axon
What are two things that help the axon find the correct target? - Answers Environmental cues
guidepost cells
What are the two long range cues mentioned in class? - Answers netrins and semaphorins
What are the two short range cues mentioned in class? - Answers cadherins and ephrins
What is the growth cone? - Answers the leading edge of the axon
Why do neurons die? - Answers neurons are overgenerated during development and so
programmed cell death acts as a control over neuronal number
What are some of the reasons why a neuron may die? - Answers remove non functioning cells
remove cells that with inappropriate connections
systems matching
remove guidance cues
remove transiently important cells
remove harmful cells
evolutionary change
What are the two types of neuronal death? - Answers necrosis
programmed cell death
Why does necrosis occur? - Answers the cell has become injured
pyknosis - Answers condensation of nuclear material that occurs during necrosis
What type of cell death occurs during a stroke? - Answers necrosis:
hemorrhagic and ischemic
