1. I think that rock from the mantle is added to the edges of both plates at convergent plate boundaries.
2. I think that one plate sinks into the mantle and is destroyed at divergent boundaries.
The correct answer is: E) provide the defense for the CNS
Astrocytes are star-shaped cells found in central nervous system (brain and spinal cord) .Some of their functions include:
• Support of neurons by supporting endothelilal cell of blood–brain barrier,
• Provide nutrients to neurons
• Maintain ion balance and thus controlchemical environment around neurons
• Repair of injuries in the brain
• the secretion or absorption of neural transmitters…
The cells that provide the defense for the CNS are called microglia. Those cells are also glial cells, derived from macrophages and thus, part of active immune defense.
It implants itself to the walls of the uterus (endometrium) by umbilical cord.
The answers are
1. nitrogenous
2. acid-base
3. fluid
