Chapter 9 Quiz 2

A  is always followed by regeneration.

B  is a stage of normal early neural development

C  is a common, but unfortunate, consequence of accidental exposure to neural gradients.

D  is rare in healthy humans until after puberty

E  starts to occur in humans around the age of 50.

A  with almost any neuron.

B  only with their correct targets.

C  only with neurons of the same type.

D  only with glial cells

E  only with the correct glial cells.

A  monogamy

B  inertia.

C  promiscuity.

D  faithfulness

E  specificity

A  astrocytes

B  pioneer cones

C  guidance molecules

D  growth cones

E  neurons

A  retinas and optic tectums always grow in precise proportion to one another.

B  axons do not grow out from the retinas until their target structures (e.g., optic tectums) are fully grown.

C  the synaptic connections originally formed by retinal ganglion cells on the optic tectums gradually shift as both the eyes and optic tectums grow at different rates during development.

D  axons do not grow out from the retinas until the retinas are fully grown, which is why babies have disproportionately large eyes.

A  the axons grow out from the retinal ganglion cells in the remaining half of the retina to their original targets on the optic tectum.

B  the destroyed retina regenerates and then axons grow out from the complete retina and innervate the optic tectum in the species-typical fashion.

C  the axons grow out from the retinal ganglion cells in the remaining half of the retina to targets systematically distributed over the entire optic tectum.

D  half of the optic tectum degenerates

A  chemoaffinity

B  topographic gradients

C  stopping and asking for directions

D  fasciculation

E  blueprints

A  early

B  quick

C  premier

D  fast

E  pioneer

A  identify colors.

B  detect the presence of dim lights

C  perform a visual discrimination task

D  strike accurately at fly-like stimuli

E  solve maze problems

F    

A  thalamus.

B  tegmentum.

C  tectum.

D  visual cortex.

E  cerebellum.

A  proliferation.

B  regeneration.

C  degeneration.

D  color vision.

E  aggregation.

A  chemoaffinity hypothesis

B  radial glial hypothesis.

C  CAM hypothesis

D  cell-adhesion hypothesis

E  growth cone hypothesis

A  siphons.

B  adhesion digits.

C  growth cone adhesion digits.

D  filopodia

E  pseudopodia.

A    

B  ependymal cells

C  radial glial cells

D  neural cell-adhesion molecules

E  retinal ganglion cells

F  growth cones

A  sprouting.

B  cell death.

C  differentiation.

D  aggregation.

E  proliferation.

A  neural tube.

B  peripheral nervous system.

C  ventricular system.

D  cortex.

E  circulatory system of the brain.

A  layer.

B  canal.

C  crest.

D  groove

E  zone.

A  accelerated.

B  ependymal.

C  insidious.

D  inside out

E  subventricular.

A  ease

B  age

C  timing

D  experience

E  genetics