Study Questions: Week 1

- What is the substance the brain uses as fuel?

- Name two functions of the glial cells in the brain.

- What are the functions of Oligodendrocytes and Schwann cells? Where are they found?

 - Which ions are more concentrated on the inside of the cell, which ones are most concentrated on the outside?

 - What is the blood-brain barrier?

- T/F: Phagocytosis refers to the ability of a glial cell to 'digest' debris

- What symbiotic cellular entity contains its own, independent, set of genes?

- What happens to a neuron if it comes in contact with blood?

- T/F: The inside of a neuron contains more positive ions than the outside

- Name 3 glial cells types and describe where in the nervous system they are located (CNS or PNS).

- What are the two forces that keep the Cl-  and K+ concentrations in balance inside and outside the cell?

- What happens when a capillary vessel breaks inside the brain? Why is it dangerous?

- Vitamin B helps to maintain myelin in the brain.  What advantage(s) does myelin have?

a)  speeds communication between cells
b)  insulates axons from one another
c)  forms the blood/brain barrier
d)  both a) and b)
e)  all of the above

- What are the 3 forces that maintain Na+ balance along the neuron membrane?

- The central nervous system (CNS) includes:

a)  the brain
b)  the brain and spinal cord
c)  the brain, spinal cord, and nerves going out to muscles of the body
d)  all of the nerves in the brain, spinal cord, and trunk of the body

- When your brain is damaged, what type of cell attempts to counteract growing damage by absorbing unwanted chemicals and by clearing away debris?

- What mechanism maintains the high Na+ concentration outside the cell?

- When someone receives a hard blow to the head, a network of arteries and capillaries that only permit certain substances to reach the brain is ruptured.  What normally prevents toxic substances from reaching neurons?

- The axon of which animal was used to discover the nature of the action
potential?

        A. Rabbit        B. Cat
        C. Squid         D. Rhesus monkey




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