Ch 49

Which glial cells have the capacity to act as stem cells for neurons?

• Schwann cells

• oligodendrocytes

• microglia

• astrocytes

• ependymal cells

Where in the spinal cord are myelinated axons most likely to be found, and what trait of these axons makes their myelination important?

• lining the central canal; these axons are relatively wide

• inner layer; these axons are relatively long

• inner layer; these axons are relatively wide

• outer layer; these axons are relatively short

• outer layer; these axons are relatively long

What may occur to interneurons in circuits that are not accessed often?

• the addition of synapses to improve accessibility

• the removal of synapses to improve overall cognition

• the addition of new neurons by stem cells to make access easier

• the myelination of such neurons to improve their speed

• the demyelination of such neurons to improve their sensitivity

Arousal and sleep are controlled by the part of the brain called the _____.

• hypothalamus

• medulla oblongata

• cerebrum

• amygdala

• reticular formation

Which is an incorrect statement about the somatosensory and motor cortex?

• Neurons are arranged according to the part of the body that generates the sensory input

• Neurons are arranged according to the part of the body that receives the motor commands

• The cortical surface area devoted to each body part is proportional to the size of the part

• Surface area correlates with the extent of neuronal control needed

• The surface area of the motor cortex devoted to the face is larger than that devoted to the trunk

The establishment of differences in cortical hemisphere function is called _____.

• specialization

• lateralization

• the split-brain effect

• hemispheric dominance

Patients with damage to the amygdala of their brains do not _____.

• feel pain

• recall images followed by an unpleasant experience

• experience increased heart rate or sweating

• connect memories with emotions

• comprehend language

Which body part is represented by the largest area in the primary motor cortex?

• foot

• arm

• hand

• chest

• wrist

Coordination and timing of movements and balance are functions of which of the following brain structures?

• basal ganglia

• motor cortex

• midbrain motor centers

• cerebellum

• ventricles

Interconnected cavities within the brain are called _____; they contain _____.

• ventricles; white matter

• meninges; cerebrospinal fluid

• apertures; white matter

• meninges; gray matter

• ventricles; cerebrospinal fluid