Exam 5: Development and Plasticity of the Brain

After loss of sensory input from a limb, the axons representing that limb degenerate and:

Chemicals known as ____ and ____ guide neuron migration.

An axon that does not receive enough neurotrophins from a target cell will:

Damage to some of the axons that innervate a given structure may give rise to:

Define differentiation during neural development.

Ischemia and hemorrhage kill neurons by:

For some axons, glial cells produce an insulating sheath that makes rapid transmission possible. What is this process called?

____ steer new axonal branches and synapses in the right direction.

Central nervous system axons regenerate much better in fish than in mammals because fish:

Myelination in the human brain:

In response to nervous system injury, neurotrophins:

Differentiation is the:

A stroke caused by an artery rupturing is also known as:

Paralysis caused by spinal cord injury is usually only temporary in humans.

If a brain area loses a set of incoming axons, we can expect some combination of ____ by the remaining axons and collateral sprouting by other axons that ordinarily attach to some other target.

The fluid-filled cavity of the developing neural tube becomes the:

Mammals and amphibians are similar in that they can both easily generate new axons.

Which of the following best describes the process by which developing axons find their general target areas?

Tissue plasminogen activator (tPA):

Which of the following are selective as axons form synapses with target cells?