Question

1 multiple choice 0.5 points
which of the following is part of the central nervous system?
spinal cord
muscles
organs
glands
2 multiple choice 0.5 points
the lower parts of the brain function primarily in _____, whereas the outer layer of the brain functions mainly in _____.
survival; complex thought
emotion; cognition
complex behavior; complex thought
complex thought; complex behavior
3 multiple choice 0.5 points
a fatty material that covers and insulates some axons to allow for faster movement of electrical impulses along those axons is called the _______ sheath.
potentiated
myelin
dendritic
somatic

Explanation:

1. The central nervous system consists of the brain and spinal cord; muscles, organs, and glands are part of the peripheral nervous system or effector structures.
2. Lower brain structures (like the brainstem) regulate basic survival functions, while the outer brain layer (cerebral cortex) is responsible for complex thought processes.
3. The myelin sheath is a fatty insulating layer around axons that speeds up electrical signal transmission in neurons.

Answer:

1. spinal cord
2. survival; complex thought
3. myelin