30. The left cerebral hemisphere controls the muscles on the right side of the body and vice versa. Which pathway generalization best explains this phenomenon? a. pathways decussate b. pathways use a relay of neuronal connections c. pathways exhibit somatotopy d. pathways are symmetrical e. all of the above

Choose all of the processes below that are related to the nervous system communications: (multiple select question) A. Chemicals transported in blood B. Quick initiation and conclusion of regulatory effect in the body C. Slow initiation, but long-term regulatory effect in the body D. Chemicals released at synapses. E. Directly regulates the metabolism of tissues and cells

37) Multiple sclerosis is a disease in which the body attacks its own nervous system and specifically affects the myelin.  Its many symptoms include a person having a reduced sense of touch. Explain how the disease effects the conduction of information and what class of neurons appears to be affected to cause this symptom.

1b) The process of myelination results in an increase in white matter. Myelination happens for all brain regions. Because of increases in myelination i. At different times; neural signals can travel through the brain faster ii. At different times; neurogenesis is improved iii. At the same time; neurogenesis is improved iv. At the same time; neural signals can travel through the brain faster 1c) Which of the following is an illustration of experience-dependent plasticity? i. Rats raised in cages with toys have more dendritic spines and more synapses per neuron than rats raised in cages without this stimulation ii. The brain expects experiences that all humans have (such as visual and auditory input) and uses them to shape the structure of the brain. iii. Adults who became blind early in life were better able to discriminate musical pitch than were those who became blind later in life. iv. All of the above